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Refer to the Gross Combination Weight Ratings shown on page 10 for allowable GCWRs.
NOTES:
• 2500HD and 3500 models have a weight-carrying hitch limit of
3402 kg (7500 lb.) and require a weight-distributing hitch with trailer weights
in excess of this limit.
• Trailer kingpin weight should be 15-25% of total loaded trailer weight.
• Trailering capacity may be limited by the tow vehicle’s ability to carry the
trailer kingpin weight without exceeding the GVWR or Rear GAWR.
Provision for an overdrive lock-out and manual control using a tap-up, tap-down
feature on vehicles equipped with the Allison automatic transmission provides
improved performance and control when towing heavy trailers.
Often used with the heaviest trailers, fifth-wheel (or gooseneck) hitches are mounted in a pickup’s box and bolted
through the frame with the trailer’s kingpin weight located slightly in front of the tow vehicle’s rear axle. Fifth-wheel
trailer kingpin loads are higher than ball hitch trailer tongue loads, so careful attention must be given to the truck’s
payload capacity and rear-axle weight ratings (GAWR). Subtract the tow vehicle’s weight plus passenger and cargo
weights from the GVWR to determine the available payload and/or kingpin weight allowance.
Sierra 3500 models
with dual rear wheels
provide an extra
measure of stability,
traction and braking –
important attributes
when towing heavy
fifth-wheel trailers.
FIFTH-WHEEL TRAILERING WITH SIERRA 2500HD AND 3500 PICKUPS
SIERRA 2500HD & 3500 PICKUPS WITH FIFTH-WHEEL HITCH
ENGINE/TRANSMISSION Vortec 6.0L V8 (LQ4) Vortec 8.1L V8 (L18) Duramax 6.6L V8 Diesel (LBZ)
Manual or Automatic Automatic 6-speed Automatic 6-speed
Horsepower 300 @ 4400 330 @ 4200 360 @ 3200
Torque (lb.-ft.) 360 @ 4000 450 @ 3200 650 @ 1600
MODEL Max. Trailer Axle Ratio Max. Trailer Axle Ratio Max. Trailer Axle Ratio
Weight, kg (lb.) Required Weight, kg (lb.) Required Weight, kg (lb.) Required
2500HD - 4173 kg (9200 lb.) GVWR
C25903 – Regular Cab 6395 (14,100) 3.73 7212 (15,900) 3.73
Long Box, 2WD 4763 (10,500) 4.10 7303 (16,100) 4.10
C25753 – Extended Cab 6305 (13,900) 3.73 7122 (15,700) 3.73
Standard Box, 2WD 4672 (10,300) 4.10 7212 (15,900) 4.10
C25953 – Extended Cab 6214 (13,700) 3.73 7031 (15,500) 3.73
Long Box, 2WD 4627 (10,200) 4.10 7122 (15,700) 4.10
C25743 – Crew Cab 6169 (13,600) 3.73 6985 (15,400) 3.73
Standard Box, 2WD 4581 (10,100) 4.10 7076 (15,600) 4.10
C25943 – Crew Cab 6124 (13,500) 3.73 6849 (15,100) 3.73
Long Box, 2WD 4536 (10,000) 4.10 7031 (15,500) 4.10
K25903 – Regular Cab 6260 (13,800) 3.73 7076 (15,600) 3.73
Long Box, 4x4 4672 (10,300) 4.10 7167 (15,800) 4.10
K25753 – Extended Cab 6169 (13,600) 3.73 6985 (15,400) 3.73
Standard Box, 4x4 4536 (10,000) 4.10 7076 (15,600) 4.10
K25953 – Extended Cab 6078 (13,400) 3.73 6713 (14,800) 3.73
Long Box, 4x4 4491 (9900) 4.10 6985 (15,400) 4.10
K25743 – Crew Cab 6033 (13,300) 3.73 6441 (14,200) 3.73
Standard Box, 4x4 4445 (9800) 4.10 6940 (15,300) 4.10
K25943 – Crew Cab 5988 (13,200) 3.73 5988 (13,200) 3.73
Long Box, 4x4 4400 (9700) 4.10 6623 (14,600) 4.10
3500 - 4491 kg (9900 lb.) GVWR with Single Rear Wheels (SRW) / 4171 kg (11,400 lb.) GVWR with Dual Rear Wheels (DRW)
C35953 – Extended Cab 6940 (15,300) 3.73
Long Box, 2WD/SRW 4445 (9800) 4.10 7031 (15,500) 4.10
C35953 – Extended Cab 7530 (16,600) 3.73
Long Box, 2WD/DRW 4400 (9700) 4.10 6940 (15,300) 4.10
C35943 – Crew Cab 6849 (15,100) 3.73
Long Box, 2WD/SRW 4355 (9600) 4.10 6940 (15,300) 4.10
C35943 – Crew Cab 7439 (16,400) 3.73
Long Box, 2WD/DRW 4309 (9500) 4.10 6849 (15,100) 4.10
K35903 – Regular Cab 6985 (15,400) 3.73
Long Box, 4x4/SRW 4536 (10,000) 4.10 7076 (15,600) 4.10
K35903 – Regular Cab 7575 (16,700) 3.73
Long Box, 4x4/DRW 4445 (9800) 4.10 6985 (15,400) 4.10
K35953 – Extended Cab 6804 (15,000) 3.73
Long Box, 4x4/SRW 4355 (9600) 4.10 6895 (15,200) 4.10
K35953 – Extended Cab 7394 (16,300) 3.73
Long Box, 4x4/DRW 4264 (9400) 4.10 6804 (15,000) 4.10
K35943 – Crew Cab 6668 (14,700) 3.73
Long Box, 4x4/SRW 4264 (9400) 4.10 6804 (15,000) 4.10
K35943 – Crew Cab 7258 (16,000) 3.73
Long Box, 4x4/DRW 4173 (9200) 4.10 6713 (14,800) 4.10
SRW = Single Rear Wheels DRW = Dual Rear Wheels
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