2011 GMC Upfitting Wisconsin - K-Series Snow Plow Prep Package

Special applicationS – FullSize K SerieS (4x4) i

PAGE
SNOWPLOW PREP PACKAGE (VYU)............................................................................................................................................. SP— 1
Ballast Compensating Weight........................................................................................................................................... SP— 2
‘K’ – Series Snow Plow Prep Package ............................................................................................................................... SP— 3
CMVSS 105 and FMVSS 105 Allowable Center of Gravity Calculation .............................................................................. SP— 5
CMVSS 105 and FMVSS 105 Allowable Center of Gravity Charts...................................................................................... SP— 7
CMVSS 135 and FMVSS 135 Allowable Center of Gravity Calculation .............................................................................. SP— 9
CMVSS 135 and FMVSS 135 Allowable Center of Gravity Charts...................................................................................... SP— 11
‘K’ Series Snow Plow Best Practices ................................................................................................................................. SP— 13
‘K’ Series Snow Plow Applications – Max. Plow/Hardware Weights ............................................................................... SP— 14
For Snowplow Prep Pkg. Electrical Provisions ................................................................................................. See C/K Electrical
http://www.gmupﬁtter.com/publicat/2008_BB/08_LDCKFS_Elec_D8a.pdf

Special Applications – SPPP – 2011

Special applicationS – FullullSize SerieS (4x4)4)
pecial applicationS – F Size K K SerieS (4x SP–1
SP— 1

PAGE
PAGE
SNOWPLOW PREP PACKAGE (VYU)
The chart on the page SP-4 shows GMTG and General Motors approved models available with snowplow prep package-option VYU.

GM recommends that when a snowplow is mounted on a vehicle, only one passenger should accompany the driver. More than one pas-
senger may exceed Front Gross Axle Weight Ratings.

Prior to installing a front mounted snowplow, the following process should be followed and necessary information obtained.

• Establish vehicle curb weight
• Establish chassis manufacturer’s front and rear axle weight ratings
• Chevrolet and GMC truck dealers can provide availability, specifications, Gross Vehicle Weight Ratings (GVWR), and Front and
Rear Gross Axle Weight Ratings (FGAWR/RGAWR). For vehicles already built, this information can be found on the certification
label installed on driver’s door/door frame or provided on the cover of the Incomplete Vehicle Document.

The following information should be obtained and provided by the manufacturers of snowplows and salt spreaders:

• Specifications, weights and center of gravity data
• Vehicle installation guidelines and instructions
• Calculation of weight distribution for the front and rear axles

The loaded vehicle with driver, passenger, aftermarket accessories, snowplows, spreader, and cargo must not exceed the Gross Vehicle
Weight Rating (GVWR), and Front and Rear Gross Axle Weight Ratings. In addition, the completed curb weight vehicle, with all installed
aftermarket accessories, snowplow, and spreader, and with 400 lbs. for vehicles less than 10,000 lbs. and 500 lbs. for vehicles greater
than 10,000 lbs. distributed in the driver-passenger area of the vehicle, must have a center of gravity location that is located within the
trapezoid formed by the coordinates A, B, C, D, H1 & H2, plus it must be to the rear of vertical line E and forward of vertical line F as
defined in the ALLOWABLE CENTER OF GRAVITY CHARTS. If the center of gravity location does not fall within the specified trapezoid,
ballast weight may be required to shift the center of gravity location until it falls within the specified trapezoid.

The snowplow manufacturer and the installer of the aftermarket equipment should determine the amount of rear ballast required to
ensure that the vehicle, with the attached snowplow and aftermarket equipment, complies with the Allowable Center of Gravity Trapezoid
and the resulting front and rear weight distribution ratio as defined in the Allowable Center of Gravity Charts published in this manual.
(Snowplow Prep Package — continued on next page)


SP—2

PAGE
PAGE
(Snowplow Prep Package — continued from previous page)
Ballast Compensating Weight

The use of rear ballast weight may be required to prevent exceeding the Gross Axle Weight Rating of the front axle. The use of rear
ballast weight may be required to ensure that the center of gravity location of the completed vehicle, with the attached snowplow and
other installed equipment, complies with the Allowable Center of Gravity Trapezoid and the resulting front and rear weight distribu-
tion ratio, even though the actual front weight may be less than the Gross Axle Weight Rating of the front axle. In either case, the rear
ballast weight should be securely attached in the cargo box or behind the rear axle of the vehicle in a manner which prevents it from
moving during driving and stopping.

To help avoid personal injury, refer to Z-height setting procedure
before adjusting torsion bars. If torsion bars are adjusted for
aftermarket equipment, be sure to return them to specifica-
tion when the equipment is removed. Otherwise, a front shock
absorber may dislodge and damage a front brake line. This could
result in an accident when minimum stopping distances are
required.


Special applicationS – FullSize K SerieS (4x4) SP–3

PAGE
‘K’ – GMT900 K - Series SNOWPlow Prep Package
Series Snow PLOW PREP PACKAGE 2011
PICKUPS - Single Rear Wheel (SRW)
Model K10703 K10903 K10753 K10953 K10543 K20753 K20743 K20903 K20953 K20943
Cab Regular Regular Extended Extended Crew Extended Crew Regular Extended Crew
Wheelbase inches 119 133 143.5 157.5 167 143.5 153 133 157.5 167
Pickup Box length feet / Cab to Axle length inches 6.5 8 6.5 8 8 6.5 6.5 8 8 8

GVWR lb. 6400 6400 7000 7000 7000 9500/10k* 9500/10k* 9500/9900* 9500/10k* 9900/10k*

GAWR lb. -Frt. 3950 3950 3950 3950 3950 4400/5200* 4800/5200* 4400/5200* 4800/5600* 4800/5200*
Engine Availability with VYU: opt. code
Vortec 4.8L V8 SFI Flex Fuel LY20 S S S N/A S N/A N/A N/A N/A N/A
Vortec 5.3L V8 SFI Flex Fuel LMG / LC9 A A A S A N/A N/A N/A N/A N/A

Vortec 6.0L V8 SFI Flex Fuel L96 N/A N/A N/A N/A N/A S S S S S

Vortec 6.2L V8 SFI L9H A A A N/A A N/A N/A N/A N/A N/A
Duramax 6.6L V8 Diesel LML / LGH N/A N/A N/A N/A N/A A A A A A
Base (B) Equipment Includes:
Battery 600 CCA (Gasoline Engines) S S S S S S S S S S
Dual Batteries 730 CCA (6.6L Diesel Engine) TUV N/A N/A N/A N/A N/A A A A A A
Provisions for Rear Back-Up Lighting
Front Tow Hooks V76 S S S S S S S S S S
Floor Covering HD Rubber - Std. on Work Truck / Base
BG9 B&A B&A B&A B&A B&A B&A B&A B&A B&A B&A
without YE9
Snow Plow Prep Pkg. Includes: VYU
Increased Front Spring rate 4WD F60 S S S S S S S S S S
Air cleaner, high-capacity K47 S S S S S S S S S S
External Eng. Oil Cooler KNP A A A A A R R R R R
Alternator 160 Amps - Gasoline Engines KW1 S S S S S S S S S S
Alternators - Dual 125 Amps - Diesel Engines K76 N/A N/A N/A N/A N/A S S S S S
Provision for Roof Mtd. Emergency Light TRW S S S S S S S S S S
Transmission Cooler (air to oil) Auto only KNP S S S S S S S S S S
***42mm Hole FOD with Rubber Grommet
Fwd Lamp Harness with In-Line Connector
Mntg. Location for Snow Plow Controls
Suggested Optional Equipment :
Battery 730 CCA - Gasoline Engines 6C5 A A A A A A A A A A
"B" Gas & "A"
3.73 Rear Axle Ratio GT4 A A A A A B B B B
Diesel

4.10 Rear Axle Ratio GT5 A A A A A A A A A A
Skid Plate, "Off Road" - Included with Z71 NZZ A&Y A&Y A&Y A&Y A&Y A&Y A&Y A&Y A&Y A&Y
Engine Block Heater (Req'd for Canada - opt. Z49) K05 A A A A A A A A A A

Locking Differential - Included with (NHT) Max Trailering
G80
Pack or (PCY) Towing Package or axle ratio GT5

Rear Window Defogger (N/A with A48 on Ext. & Crew Cabs)
C49 A A A A A A A A A A
(Reqs. C67 AC on Reg. Cabs)
Sliding Rear Window not avail. with C49 A48 N/A N/A N/A N/A N/A A A N/A A A
Windshield Washer Fluid System, Heated (Reqs. Opt. YE9
XA7 A A A A A A A A A A
or SLT)

* = DIESEL / k = x 1000 / s = SRW / d = DRW
B=base vehicle / A=available / X=included in package / Y=included where applicable / N/A=not available on this model / R=required on this model.



PAGE
‘K’ – Series Snow Plow Prep Package, cont.
GMT900 K - GMT900 K - Series SNOW PLOW PREP PACKAGE 2011
Series SNOW PLOW PREP PACKAGE 2011
PICKUPS - Single(s) & Dual(s) Rear Wheels Chassis-Cabs Utility
Model K30903 K30743 K30953 K30943 K31003 K31043 K31403 K20906
Cab Regular Crew Extended Crew Regular Crew Regular SUV
Wheelbase inches 133 167 157.5 167 137 161.5 161.5 130
Pickup Box length feet / Cab to Axle length inches 8 6.5 8 8 60" CA 60" CA 80" CA N/A
10700/11400*s 10800/11500*s 11000/11600*s 11000/11600*s
GVWR lb.
12800/13000*d 13000/13000*d 2 13000/13000*d 13000/13000*d 13,200 13,200 13,200 8600
GAWR lb. -Frt. 4400/5200* 4800/5600* 4800/5600* 4800/5600* 4400/5200* 4800/5600* 5200/5600* 4180
Engine Availability with VYU: opt. code
Vortec 4.8L V8 SFI Flex Fuel LY20 N/A N/A N/A N/A N/A N/A N/A N/A
Vortec 5.3L V8 SFI Flex Fuel LMG / LC9 N/A N/A N/A N/A N/A N/A N/A A

Vortec 6.0L V8 SFI Flex Fuel L96 S S S S S S S S

Vortec 6.2L V8 SFI L9H N/A N/A N/A N/A N/A N/A N/A N/A
Duramax 6.6L V8 Diesel LML / LGH A A A A A A A N/A
Base (B) Equipment Includes:
Battery 600 CCA (Gasoline Engines) S S S S B B B B
Dual Batteries 730 CCA (6.6L Diesel Engine) TUV A A A A A A A N/A
Provisions for Rear Back-Up Lighting
Front Tow Hooks V76 S S S S S S S S
Floor Covering HD Rubber - Std. on Work Truck / Base
BG9 B&A B&A B&A B&A B&A B&A B&A A
without YE9
Snow Plow Prep Pkg. Includes: VYU
Increased Front Spring rate 4WD F60 S S S S S S S N/A
Air cleaner, high-capacity K47 S S S S S S S A
External Eng. Oil Cooler KNP S S S S S S S A
Alternator 160 Amps - Gasoline Engines KW1 S S S S S S S A
Alternators - Dual 125 Amps - Diesel Engines K76 S S S S S S S N/A
Provision for Roof Mtd. Emergency Light TRW S S S S S S S N/A
Transmission Cooler (air to oil) Auto only KNP S S S S S S S A
***42mm Hole FOD with Rubber Grommet
Fwd Lamp Harness with In-Line Connector
Mntg. Location for Snow Plow Controls
Suggested Optional Equipment :
Battery 730 CCA - Gasoline Engines 6C5 A A A A A A A A

3.73 Rear Axle Ratio GT4 B B B B B B B B

4.10 Rear Axle Ratio GT5 A A A A A A A
Skid Plate, "Off Road" - Included with Z71 NZZ A&Y A&Y A&Y A&Y A&Y A&Y A&Y A
Engine Block Heater (Req'd for Canada - opt. Z49) K05 A A A A A A A A

Locking Differential - Included with (NHT) Max Trailering
G80
Pack or (PCY) Towing Package or axle ratio GT5

Rear Window Defogger (N/A with A48 on Ext. & Crew Cabs)
C49 A A A A A A A N/A
(Reqs. C67 AC on Reg. Cabs)
Sliding Rear Window not avail. with C49 A48 N/A A A A A A A N/A
Windshield Washer Fluid System, Heated (Reqs. Opt. YE9
XA7 A A A A A A A A&Y
or SLT)

* = DIESEL / k = x 1000 / s = SRW / d = DRW
B=base vehicle / A=available / X=included in package / Y=included where applicable / N/A=not available on this model / R=required on this model.


SP— 9

PAGE
PAGE
CMVSS105 and FMVSS105 Allowable Center of Gravity Calculation

C/G of vehicle in CMVSS or FMVSS unladen condition [Curb + 181.4 kg. (400 lb) or Curb + 226.8 kg. (500 lb) as defined by CMVSS
105 and FMVSS 105] must be inside shaded area – that is, the C/G must be within the trapezoid formed by the coordinates A, B, C,
D, H1, & H2, plus the C/G must be to the rear of vertical line E and forward of vertical line F.
The center of gravity of the total vehicle falls within the areas referenced on the “ALLOWABLE CENTER OF GRAVITY CHART” that follows.
Instructions for determining the allowable center of gravity variation are listed below:

These charts detail the envelope of allowable center of gravity variation for completed vehicles. This is significant for the lightly loaded por-
tion of FMVSS 105, which is defined as curb plus 181.4 kg (400 lb) distributed in the driver-passenger area of the vehicle for vehicles with
GVWR of 4536 kg (10,000 lb) or less or as curb plus 226.8 kg (500 lb) distributed in the driver-passenger area of the vehicle for vehicles with
GVWR greater than 4536 kg (10,000 lb).

The lightly loaded center of gravity complete vehicles needs to be restricted so it will meet FMVSS 105 stopping distances. The laden center
of gravity does not need to be specified as it is controlled within the CMVSS 105 and FMVSS 105 test procedure by specific instructions
as to how ballast is to be placed (while height is not controlled, it is assumed that for test purposes it would be reasonable).

For Body Builder’s use, the center of gravity location can be approximated by the following formula:

d = [Wrc + Wrb + [(Hp)(Wp)/WB]] WB
Wt
h = [h1Wc + h2Wb + (h3)(Wp)]
Wt
d = horizontal distance from front wheels to completed vehicle center of gravity cm (in)
(continued on next page)

SP—10

PAGE
PAGE
CMVSS 105 and FMVSS 105 Allowable Center of Gravity Calculation (continued)
h = vertical distance from ground to completed vehicle center of gravity cm (in)
Wrc = rear component of bare chassis weight kg (lb)
Wrb = rear component of body weight kg (lb)
WB = vehicle wheelbase cm (in)
Wt = total weight of chassis and body kg (lbs) plus 181.4 kg (400 lb) for vehicles with GVWR of 4536 kg (10,000 lb) or less
Wt = total weight of chassis and body kg (lbs) plus 226.8 kg (500 lb) for vehicles with GVWR greater than 4536 kg (10,000 lb)
h1 = center of gravity height from ground of the bare chassis = 71.1 cm (28 in)
Wc = total weight of chassis kg (lb)
h2 = center of gravity height of body from ground cm (in)
Wb = total weight of body kg (lb)
Wp = 181.4 kg (400 lb) amount from lightly loaded definition that is evenly distributed in driver-passenger area of
vehicle for vehicles with GVWR of 4536 kg (10,000 lb) or less
Wp = 226.8 kg (500 lb) amount from lightly loaded definition that is evenly distributed in driver-passenger area of
vehicle for vehicles with GVWR greater than 4536 kg (10,000 lb)
Hp = 146.7 cm (57.76 in) horizontal distance from front axle to center of gravity of 181.4 kg (400 lb) or
226.8 kb (500 lb) evenly distributed in driver-passenger area of vehicle
h3 = 94.8 cm (37.32 in) vertical center of gravity height of 181.4 kg (400 lb) evenly distributed in driver-passenger
area for vehicles with 3900 kg (8600 lb) GVWR
area for vehicles with 3856, 4173 and 4491 kg (8500, 9200 and 9900 lb) GVWR
area for vehicles with 5171 - 5443 kg (11,400 - 12,000 lb) GVWR

NOTE: An alternate method of center of gravity calculation may be found in the current issue of the General Motors Body Builders
Book in the general instruction section and in SVIE Bulletin #39.


Special applicationS – FullSize izeSerieS (4x(4x4)
pecial applicationS – FullS K K SerieS 4) SP–7
SP— 11

PAGE
PAGE
CMVSS 105 and FMVSS 105
CMVSS105 and FMVSS105 Allowable Center of Gravity Charts
ALLOWABLE CENTER OF GRAVITY CHARTS
Incomplete, Pickup Box Removal, or Snow Plow Prep Package Vehicles
Snowplow Prep Package Vehicles
Coordinates of Allowable C/G Variation at Fwd RRwd
Coordinates of Allowable C/G Variation+at CMSS/FMSS Unladen Curb Wt. +
CMVSS/FMVSS Unladen, Curb Weight 181.4 kg (400 lb) or C/G C/G Forward Rearward
Model GVWR Brake Wheel- Rear 181.4 kg kg (500 lb) or 226.8 kg (500 lbs.) 105deﬁned by CMVSS & FMVSS 105
226.8
(400 lbs.) as defined by CMVSS as and FMVSS 105 Limit Limit
C/G Limit C/G Limit
kg System Base Wheel mm mm mm
GVWR Brake
(lb) Wheelbase mm Rear (in) (in) (in)
Model (in) Wheel H1 mm (in) H2 mm (in) A A mm (in) B mm (in) CD (in) E D mm (in)
mm E mm (in) F mm (in)
Kg (lb) System mm (in) H1 H2 B C F

K20753 4173 (9200) 4309
JH6 3645 (143.5)3904 SRW 304.8 1219.2 (48.0)
12881208 (47.6)
1542 2785 2606 (102.6) 1288 (112.6)
3039 2860 2733
K20743 J95 SRW 304.8 (12.0) 1219.2 1462 (57.6) 1208 (47.6) 2860 (112.6)
(9500) (153.7) (12.0) (48.0) (50.7) (60.7) (109.6) (119.6) 50.7) (107.6)
K20743 4173 (9200) JH6 3886 (153.0) SRW 304.8 (12.0) 1219.2 (48.0) 1282 (50.5) 1536 (60.5) 2773 (109.2) 3026 (119.1) 1282 (50.5) 3026 (119.1)
4536 3904 304.8 1219.2 1288 1542 2785 3039 1288 2733
K20743 J95 SRW
K20903 4173 (9200) JH6
(10,000) 3378 (133.0)
(153.7) SRW 304.8 (12.0)
(12.0) (48.0) (48.0)
1219.2 1126 (44.3)
(50.7) (60.7) 1379 (54.3)
(109.6) (119.6)(95.3) 50.7)
2421 2675 (105.3)
(107.6) 1126 (44.3) 2675 (105.3)
K20953 4173 (9200)
K20753
JH6
4309 4000 (157.5)3662 SRW
J95 SRW
304.8 (12.0)
304.8 1219.2 (48.0)
1219.2 12131317 (51.9)
1467 1571 (61.9)
2618 2852 (112.3) 1209 (122.2)
2871 3105 2564 1317 (51.9) 3105 (122.2)
(9500) (144.2) (12.0) (48.0) (47.8) (57.8) (103.1) (113.0) (47.6) (100.9)
K20943 4173 (9200) JH6 4242 (167.0) SRW 304.8 (12.0) 1219.2 (48.0) 1392 (54.8) 1646 (64.8) 3019 (118.9) 3273 (128.9) 1392 (54.8) 3273 (128.9)
4536 3662 304.8 1219.2 1213 1467 2618 2871 1209 2564
K30903 K20753 JH6 J95
3378 (133.0) SRW
4490.5 (9900) (10,000) (144.2) SRW 304.8 (12.0)
(12.0) (48.0) (48.0)
1219.2 1126 (44.3)
(47.8) (57.8) 1379 (54.3)
(103.1) (113.0)(95.3) (47.6)
2421 2675 (105.3)
(100.9) 1126 (44.3) 2675 (105.3)
K30953 4490.5 (9900) JH6
4309 4000 (157.5)3395 SRW 304.8 (12.0)
304.8 1219.2 (48.0)
1219.2 11311317 (51.9)
1385 1571 (61.9)
2433 2852 (112.3) 1120 (122.2)
2687 3105 2377 1317 (51.9) 3105 (122.2)
K20903 J95 SRW
(9500) (133.7) (12.0) (48.0) (44.5) (54.5) (95.8) (105.8) (44.1) (93.6)
K30943 4490.5 (9900) JH6 4242 (167.0) SRW 304.8 (12.0) 1219.2 (48.0) 1392 (54.8) 1646 (64.8) 3019 (118.9) 3273 (128.9) 1392 (54.8) 3273 (128.9)
4491
K30903 5171 (11,400)
K20903 JH7
(9900)
3378 (133.0)3395 DRW
J95
(133.7)
SRW
304.8
304.8 (12.0)
(12.0)
1219.2
(48.0)
1131
(44.5)
1385
1219.2 (48.0) 939 (37.0)
(54.5)
2433
1150 (45.3)
(95.8)
2687 1120 2377
2580 (101.6)(44.1) (109.9)
(105.8)
2792 (93.6) 939 (37.0) 2792 (109.9)
K30953 5171 (11,400) JH7
4491
4000 (157.5)4259 DRW 304.8 (12.0)
304.8
1219.2 (48.0)
1219.2 1397
1099 (43.3)
1651
1310 (51.6)
3031
3042 (119.8)
3284
3254 (128.1)
1406 2982
1099 (43.3) 3254 (128.1)
K20943 J95 SRW
K30943 5171 (11,400) (9900)
JH7 4242 (157.7) DRW
(167.0) (12.0)
304.8 (12.0) (48.0) (48.0)
1219.2 (55.0) (65.0)
1161 (45.7) (119.3)
1373 (54.1) (129.3)
3222 (126.9)(55.4) (135.2)
3434 (117.4) 1161 (45.7) 3434 (135.2)
K31003 5443 (12,000) 4536
JH7 3480 (137.0)4259 DRW 304.8 1219.2 (48.0)
1397 965 (38.0)
1651 3031 2656 (104.6) 1406 (112.9)
3284 2868 2982
K20943 J95 SRW 304.8 (12.0) 1219.2 1177 (46.3) 965 (38.0) 2868 (112.9)
(10,000) (157.7) (12.0) (48.0) (55.0) (65.0) (119.3) (129.3) (55.4) (117.4)
K31053 5443 (12,000) JH7 4102 (161.5) DRW 304.8 (12.0) 1219.2 (48.0) 1125 (44.3) 1337 (52.6) 3118 (122.8) 3330 (131.1) 1125 (44.3) 3330 (131.1)
4309 4017 304.8 1219.2 1323 1576 2863 3117 1326 2812
K20953 J95 SRW
K31403 5443 (12,000) JH7
(9500) 4102 (161.5)
(158.2) DRW 304.8 (12.0)
(12.0) (48.0) (48.0)
1219.2 1125 (44.3)
(52.1) (62.0) 1337 (52.6)
(112.7) 3118 (122.8)(52.2) (131.1)
(122.7) 3330 (110.7) 1125 (44.3) 3330 (131.1)
4536 4017 304.8 1219.2 1323 1576 2863 3117 1326 2812
SRW = Single RearK20953
Wheel (10,000)
J95
(158.2)
SRW Brake Systems:
(12.0) (48.0) (52.1) (62.0) (112.7) (122.7) (52.2) (110.7)
DRW = Dual Rear Wheel Hydraulic Powered Boosters JH6, JH7
C/G = Center of Gravity 4899 3904 304.8 1219.2 1074 1286 2971 3182 1171 2928
K30743 J95 SRW
(10,800) (153.7) (12.0) (48.0) (42.3) (50.6) (117.0) (125.3) (46.1) (115.3)

5216 3904 304.8 1219.2 1074 1286 2971 3182 1171 2928
K30743 J95 SRW
(11,500) (153.7) (12.0) (48.0) (42.3) (50.6) (117.0) (125.3) (46.1) (115.3)

4853 3395 304.8 1219.2 943 1155 2593 2804 1019 2547
K30903 J95 SRW
(10,700) (133.7) (12.0) (48.0) (37.1) (45.5) (102.1) (110.4) (40.1) (100.3)

5171 3395 304.8 1219.2 943 1155 2593 2804 1019 2547
K30903 J95 SRW
(11,400) (133.7) (12.0) (48.0) (37.1) (45.5) (102.1) (110.4) (40.1) (100.3)

Special Applications – SPPP – 2008 13

Special applicationS – FullSize izeSerieS (4x(4x4)
pecial applicationS – FullS K K SerieS 4) SP–8
SP— 11

PAGE
PAGE
CMVSS 105 and FMVSS 105
Coordinates of Allowable C/G Variation+at CMSS/FMSS Unladen Curb Wt. +
CMVSS/FMVSS Unladen, Curb Weight 181.4 kg (400 lb) or C/G C/G Forward Rearward
Model GVWR Brake Wheel- Rear 181.4 kg kg (500 lb) or 226.8 kg (500 lbs.) 105deﬁned by CMVSS & FMVSS 105
226.8
(400 lbs.) as defined by CMVSS as and FMVSS 105 Limit Limit
C/G Limit C/G Limit
kg System Base Wheel mm mm mm
GVWR Brake
(lb) Wheelbase mm Rear (in) (in) (in)
Model (in) Wheel H1 mm (in) H2 mm (in) A A mm (in) B mm (in) CD (in) E D mm (in)
mm E mm (in) F mm (in)
Kg (lb) System mm (in) H1 H2 B C F

K20753 4173 (9200) 5806
JH6 3645 (143.5)3395 SRW 304.8 1219.2 (48.0)943 1208 (47.6)
1155 2593 2606 (102.6) 1019 (112.6)
2804 2860 2547
K30903 J96 DRW 304.8 (12.0) 1219.2 1462 (57.6) 1208 (47.6) 2860 (112.6)
(12,800) (133.7) (12.0) (48.0) (37.1) (45.5) (102.1) (110.4) (40.1) (100.3)
K20743 4173 (9200) JH6 3886 (153.0) SRW 304.8 (12.0) 1219.2 (48.0) 1282 (50.5) 1536 (60.5) 2773 (109.2) 3026 (119.1) 1282 (50.5) 3026 (119.1)
5897 3395 304.8 1219.2 943 1155 2593 2804 1019 2547
K30903 J96 DRW
K20903 4173 (9200) JH6
(13,000) 3378 (133.0)
(133.7) SRW 304.8 (12.0)
(12.0) (48.0) (48.0)
1219.2 (37.1)1126 (44.3)
(45.5) 1379 (54.3)
(102.1) (110.4)(95.3) (40.1)
2421 2675 (105.3)
(100.3) 1126 (44.3) 2675 (105.3)
K20953 4173 (9200)
K30943
JH6
4989 4000 (157.5)4259 SRW
J95 SRW
304.8 (12.0)
304.8 1219.2 (48.0)
1219.2 11651317 (51.9)
1377 1571 (61.9)
3235 2852 (112.3) 1278 (122.2)
3446 3105 3195 1317 (51.9) 3105 (122.2)
(11,000) (157.7) (12.0) (48.0) (45.9) (54.2) (127.4) (135.7) (50.3) (125.8)
K20943 4173 (9200) JH6 4242 (167.0) SRW 304.8 (12.0) 1219.2 (48.0) 1392 (54.8) 1646 (64.8) 3019 (118.9) 3273 (128.9) 1392 (54.8) 3273 (128.9)
5262 4259 304.8 1219.2 1165 1377 3235 3446 1278 3195
K30903 K30943 JH6 J95
3378 (133.0) SRW
4490.5 (9900) (11,600) (157.7) SRW 304.8 (12.0)
(12.0) (48.0) (48.0)
1219.2 1126 (44.3)
(45.9) (54.2) 1379 (54.3)
(127.4) (135.7)(95.3) (50.3)
2421 2675 (105.3)
(125.8) 1126 (44.3) 2675 (105.3)
K30953 4490.5 (9900) JH6
5897 4000 (157.5)4259 SRW 304.8 (12.0)
304.8 1219.2 (48.0)
1219.2 11651317 (51.9)
1377 1571 (61.9)
3235 2852 (112.3) 1278 (122.2)
3446 3105 3195 1317 (51.9) 3105 (122.2)
K30943 J96 DRW
(13,000) (157.7) (12.0) (48.0) (45.9) (54.2) (127.4) (135.7) (50.3) (125.8)
K30943 4490.5 (9900) JH6 4242 (167.0) SRW 304.8 (12.0) 1219.2 (48.0) 1392 (54.8) 1646 (64.8) 3019 (118.9) 3273 (128.9) 1392 (54.8) 3273 (128.9)
4989
K30903 5171 (11,400)
K30953 JH7
(11,000) 3378 (133.0)4017 DRW
J95
(158.2)
SRW
304.8
304.8 (12.0)
(12.0)
1219.2 1103
(48.0) (48.0)
1219.2 1315
(43.4) 939 (37.0)
(51.8)
3055
1150 (45.3)
(120.3)
3266 1205 3013
2580 (101.6)(47.4) (109.9)
(128.6) 2792 (118.6) 939 (37.0) 2792 (109.9)
K30953 5171 (11,400) JH7
5262
4000 (157.5)4017 DRW 304.8 (12.0)
304.8
1219.2 (48.0)
1219.2 1103
1099 (43.3)
1315
1310 (51.6)
3055
3042 (119.8)
3266
3254 (128.1)
1205 3013
1099 (43.3) 3254 (128.1)
K30953 J95 SRW
K30943 5171 (11,400) (11,600)
JH7 4242 (158.2) DRW
(167.0) (12.0)
304.8 (12.0) (48.0) (48.0)
1219.2 (43.4) (51.8)
1161 (45.7) (120.3)
1373 (54.1) (128.6)
3222 (126.9)(47.4) (135.2)
3434 (118.6) 1161 (45.7) 3434 (135.2)
K31003 5443 (12,000) 5897
JH7 3480 (137.0)4017 DRW 304.8 1219.2 (48.0)
1103 965 (38.0)
1315 3055 2656 (104.6) 1205 (112.9)
3266 2868 3013
K30953 J96 DRW 304.8 (12.0) 1219.2 1177 (46.3) 965 (38.0) 2868 (112.9)
(13,000) (158.2) (12.0) (48.0) (43.4) (51.8) (120.3) (128.6) (47.4) (118.6)
K31053 5443 (12,000) JH7 4102 (161.5) DRW 304.8 (12.0) 1219.2 (48.0) 1125 (44.3) 1337 (52.6) 3118 (122.8) 3330 (131.1) 1125 (44.3) 3330 (131.1)
5987 3493 304.8 1219.2 968 1180 2666 2877 1048 2619
K31003 J96 DRW
K31403 5443 (12,000) JH7
(13,200) 4102 (161.5)
(137.5) DRW 304.8 (12.0)
(12.0) (48.0) (48.0)
1219.2 (38.1)1125 (44.3)
(46.5) 1337 (52.6)
(105.0) 3118 (122.8)(41.3) (131.1)
(113.3) 3330 (103.1) 1125 (44.3) 3330 (131.1)
5987 4356 304.8 1219.2 1190 1402 3307 3518 1307 3267
SRW = Single RearK31043
Wheel (13,200)
J96
(171.5)
DRW Brake Systems:
(12.0) (48.0) (46.9) (55.2) (130.2) (138.5) (51.5) (128.6)
DRW = Dual Rear Wheel Hydraulic Powered Boosters JH6, JH7
C/G = Center of Gravity 5987 4115 304.8 1219.2 1128 1340 3128 3339 1234 3086
K31403 J96 DRW
(13,200) (162.0) (12.0) (48.0) (44.4) (52.8) (123.1) (131.5) (48.6) (121.5)

SRW = Single Rear Wheel
DRW = Dual Rear Wheel
C/G = Center of Gravity
Brake Systems: Hydraulic Powered Boosters – JH6, JH7

Special Applications – SPPP – 2008 14

SP—12

PAGE
PAGE
CMVSS135 and FMVSS135 Allowable Center of Gravity Calculation

C/G of vehicle in CMVSS or FMVSS unladen condition [Curb + 181.4 kg. (400 lb)] must be inside shaded area – that is, the C/G
must be within the trapezoid formed by the coordinates A, B, C, D, H1, & H2, plus the C/G must be to the rear of vertical line E and
forward of vertical line F.
The center of gravity of the total vehicle falls within the areas referenced on the “ALLOWABLE CENTER OF GRAVITY CHART” that fol-
lows. Instructions for determining the allowable center of gravity variation are listed below:
These charts detail the envelope of allowable center of gravity variation for completed vehicles. This is significant for the lightly loaded portion
of CMVSS 135 and FMVSS 135, which is defined as curb plus 181.4 kg (400 lb) distributed in the driver-passenger area of the vehicle.
The lightly loaded center of gravity complete vehicles needs to be restricted so it will meet CMVSS 135 and FMVSS 135 stopping distances.
The laden center of gravity does not need to be specified as it is controlled within the CMVSS 135 and FMVSS 135 test procedure by specific
instructions as to how ballast is to be placed (while height is not controlled, it is assumed that for test purposes it would be reasonable).

For Body Builder’s use, the center of gravity location can be approximated by the following formula:

d = [Wrc + Wrb + [(Hp)(Wp)/WB]] WB
Wt
h = [h1Wc + h2Wb + (h3)(Wp)]
Wt
d = horizontal distance from front wheels to completed vehicle center of gravity cm (in)
h = vertical distance from ground to completed vehicle center of gravity cm (in)
Wrc = rear component of bare chassis weight kg (lb)
Wrb = rear component of body weight kg (lb)
(continued on next page)

SP— 13

PAGE
PAGE
CMVSS135 and FMVSS135 Allowable Center of Gravity Calculation (continued)
WB =
vehicle wheelbase cm (in)
Wt =
total weight of chassis and body kg (lbs) plus 181.4 kg (400 lb)
h1 =
center of gravity height from ground of the bare chassis = 71.1 cm (28 in)
Wc =
total weight of chassis kg (lb)
h2 =
center of gravity height of body from ground cm (in)
Wb =
total weight of body kg (lb)
Wp =
181.4 kg (400 lb) amount from lightly loaded definition that is evenly distributed in driver-passenger area of vehicle
Hp =
146.7 cm (57.76 in) horizontal distance from front axle to center of gravity of 181.4 kg (400 lb) evenly distributed in
driver-passenger area of vehicle
area for vehicles with 3500 kg (7716 lb) GVWR or less

NOTE: An alternate method of center of gravity calculation may be found in the current issue of the General Motors Body Builders
Book in the general instruction section and in SVIE Bulletin #39.


Special applicationS – Fand Size ize135 SerieSx(4x4)
pecial applicationS – FullS K SerieS (4 4) SP–11
SP—14

PAGE
PAGE
ull K
CMVSS 135 FMVSS
Coordinates of Allowable C/G Variation at+CMSS/FMSS Unladen Curb Wt. + C/GForward
CMVSS/FMVSS Unladen, Curb Weight 181.4 kg (400 lb) C/G Rearward
Model GVWR Brake Wheel- Rear 181.4 kg (400 lbs.) or 226.8 kg (500 lbs.) as deﬁned by CMVSS & FMVSS 105 Limit
mm (in) Limit C/G Limit C/G Limit
kg System Base Wheel mm (in) mm
GVWR Brake Wheelbase Rear
Model (lb) mm H1 mm (in) H2 mm (in) A mm (in) B mm (in) C mm (in) D mm (in) (in)E mm (in) F mm (in)
Kg (lb) System mm (in) (in) Wheel H1 H2 A B C D E F
K10703 2903 (6400) JF7
2903 3022.6 (119.0) SRW
3022.6 305305
(12.0) 1219 (48.0) 904904 (35.6)
1219 1585 1585 (62.4)
1387 1397 (55.0)
2078 1041 (81.8) 2078
2078 1041 (41.0) 2078 (81.8)
C10703 JF7 SRW
K10903 2903 (6400) (6400)
JF7 3378.2 (119.0)
(133.0) SRW (12.0)
305 (12.0) (48.0) (48.0) (35.6) (38.6)
1219 980 (62.4) 1661 (54.6)
(65.4) (81.8)
1539 (60.6) (41.0) (87.2) (81.8)
2215 1143 (45.0) 2215 (87.2)
2903 3378.2 305 1219 980 1661 1539 2215 1143 2215
C10903 JF7 SRW
(6400) (133.0) (12.0) Systems:
Brake (48.0) (38.6) (65.4) (60.6) (87.2) (45.0) (87.2)
DRW = Dual Rear Wheel 2903 3401.1 Hydraulic Powered Boosters
305 1219 986 1666 JH6, 1549
JH7 2230 1143 2230
C10553 JF7 SRW
C/G = Center of Gravity (6400) (133.9) (12.0) (48.0) (38.8) (65.6) (61.0) (87.8) (45.0) (87.8)
2903 3644.9 305 1219 1046 1717 1649 2316 1219 2316
C10753 JF7 SRW
(6400) (143.5) (12.0) (48.0) (41.2) (67.6) (64.8) (91.2) (48.0) (91.2)
2903 3022.6 305 1219 904 1585 1397 2078 1041 2078
K10703 JF7 SRW
(6400) (119.0) (12.0) (48.0) (35.6) (62.4) (55.0) (81.8) (41.0) (81.8)
2903 3378.2 305 1219 980 1661 1539 2215 1143 2215
K10903 JF7 SRW
(6400) (133.0) (12.0) (48.0) (38.6) (65.4) (60.6) (87.2) (45.0) (87.2)

2994 JF3 3401.1 305 1219 945 1631 1656 2332 1143 2332
C10553 SRW
(6600) ABS (133.9) (12.0) (48.0) (37.2) (64.2) (65.2) (91.8) (45.0) (91.8)
3084 JF3 3649.0 305 1219 975 1661 1758 2433 1219 2433
C10753 SRW
(6800) ABS (133.9) (12.0) (48.0) (38.4) (65.4) (69.2) (95.8) (48.0) (95.8)
3130 JF3 4000.5 305 1219 1046 1722 1910 2586 1346 2586
C10953 SRW
(6900) ABS (157.5) (12.0) (48.0) (41.2) (67.8) (75.2) (101.8) (53.0) (101.8)
3184 JF3 3378.2 305 1219 925 1504 1646 2322 1143 2322
K10903 SRW
(6800) ABS (133.0) (12.0) (48.0) (36.4) (59.2) (64.8) (91.4) (45.0) (91.4)
3084 JF3 3401.1 305 1219 930 1610 1656 2332 1143 2332
K10553 SRW
(6800) ABS (133.9) (12.0) (48.0) (36.6) (63.4) (65.2) (91.8) (45.0) (91.8)
3175 JF3 3644.9 305 1219 965 1636 1758 2433 1219 2433
K10753 SRW
(7000) ABS (143.5) (12.0) (48.0) (38.0) (64.4) (69.2) (95.8) (48.0) (95.8)
3175 JF3 4000.5 305 1219 1026 1707 1910 2586 1346 2586
K10953 SRW
(7000) ABS (157.5) (12.0) (48.0) (40.4) (67.2) (75.2) (101.8) (53.0) (101.8)


Special applicationS – Fand Size ize135 SerieSx(4x4)
pecial applicationS – FullS K SerieS (4 4) SP–12
SP—14

PAGE
PAGE
ull K
CMVSS 135 FMVSS
Coordinates of Allowable C/G Variation at+CMSS/FMSS Unladen Curb Wt. + C/GForward
CMVSS/FMVSS Unladen, Curb Weight 181.4 kg (400 lb) C/G Rearward
Model GVWR Brake Wheel- Rear 181.4 kg (400 lbs.) or 226.8 kg (500 lbs.) as deﬁned by CMVSS & FMVSS 105 Limit
mm (in) Limit C/G Limit C/G Limit
kg System Base Wheel mm (in) mm
GVWR Brake Wheelbase Rear
Model (lb) mm H1 mm (in) H2 mm (in) A mm (in) B mm (in) C mm (in) D mm (in) (in)E mm (in) F mm (in)
Kg (lb) System mm (in) (in) Wheel H1 H2 A B C D E F
K10703 2903 (6400) JF7
3084 3022.6 (119.0)
JF3 3644.9 SRW 305305
(12.0) 1219 (48.0) 1092
1219 904 (35.6)
1768 1585 (62.4)
1834 1397 (55.0)
2515 1219 (81.8) 2515
2078 1041 (41.0) 2078 (81.8)
C10753 SRW
K10903 2903 (6400) JF7
(6800) 3378.2
VSES (133.0) SRW
(143.5) 305 (12.0)
(12.0) (48.0) (48.0) (43.0) (38.6)
1219 980 (69.6) 1661 (72.2)
(65.4) 1539 (60.6)
(99.0) (48.0) (87.2) (99.0)
2215 1143 (45.0) 2215 (87.2)
3084 JF3 3644.9 305 1219 1092 1768 1834 2515 1219 2515
C10543 SRW
SRW = Single Rear Wheel (6800) VSES (143.5) (12.0) Systems:
Brake (48.0) (43.0) (69.6) (72.2) (99.0) (48.0) (99.0)
DRW = Dual Rear Wheel 3175 JF3 3644.9 Hydraulic Powered Boosters
305 1219 1067 1742 JH6, 1834
JH7 2515 1219 2515
K10753 SRW
C/G = Center of Gravity (7000) VSES (143.5) (12.0) (48.0) (42.0) (68.6) (72.2) (99.0) (48.0) (99.0)
3175 JF3 3644.9 305 1219 1067 1742 1834 2515 1219 2515
K10543 SRW
(7000) VSES (143.5) (12.0) (48.0) (42.0) (68.6) (72.2) (99.0) (48.0) (99.0)

3084 3644.9 305 1219 1265 1951 1864 2545 1265 2545
C10753 JD9 SRW
(6800) (143.5) (12.0) (48.0) (49.8) (76.8) (73.4) (100.2) (49.8) (100.2)
3175 3644.9 305 1219 1265 1946 1864 2545 1265 2545
C10753 JD9 SRW
(7000) (143.5) (12.0) (48.0) (49.8) (76.6) (73.4) (100.2) (49.8) (100.2)
3084 3644.9 305 1219 1265 1951 1864 2545 1265 2545
C10543 JD9 SRW
(6800) (143.5) (12.0) (48.0) (49.8) (76.8) (73.4) (100.2) (49.8) (100.2)
3220 3644.9 305 1219 1270 1951 1864 2545 1270 2545
C10543 JD9 SRW
(7100) (143.5) (12.0) (48.0) (50.0) (76.8) (73.4) (100.2) (50.0) (100.2)
3175 3644.9 305 1219 1265 1946 1864 2545 1265 2545
K10753 JD9 SRW
(7000) (143.5) (12.0) (48.0) (49.8) (76.6) (73.4) (100.2) (49.8) (100.2)
3266 3644.9 305 1219 1290 1966 1864 2545 1290 2545
K10753 JD9 SRW
(7200) (143.5) (12.0) (48.0) (50.8) (77.4) (73.4) (100.2) (50.8) (100.2)
3311 3644.9 305 1219 1275 19.1 1864 2545 1275 2545
K10543 JD9 SRW
(7300) (143.5) (12.0) (48.0) (50.2) (76.8) (73.4) (100.2) (50.2) (100.2)

ABS = Antilock Braking System
Brake Systems: Vacuum Powered Boosters - JF3, JF7 and JD9.
C/G = Center of Gravity
DRW = Dual Rear Wheel
VSES = Vehicle Stability Enhancement System



PAGE
‘K’ Series Snow Plow Best Practices
1 OEM Steering gear, Suspension and Powertrain Component mounting holes & associated OEM fasteners should not be used
to attach Snow Plow Mounting equipment.
2) A suggested allowance of 10 mm minimumclearance to stationary OEM components example: Bumper Asm, Steering Box,
Cooling System components is highly recommended. Note these components have varying positional tolerances.
3) A suggested allowance of 20 mm minimum clearance to OEM components subject to movement example: Steering Gear,
Suspension (A-Arm, Axle, Strut, & Stab Bar asms) at full jounce is highly recommended. Note these components have
varying positional tolerances.
4) Snow Plow & Associated Mounting Equipment should not exceed front axle available payload rating of vehicle as optioned.
Plow Blade height, width & mass should be in accordance with Snow Plow Manufacturers recommended requirements for
specific vehicle.

15mm hole
for snow plow
attachment


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