Cummins
Power Stroke
Duramax
Tech
Service & Repair
  1. Diesel Hub
  2. ›
  3. Diesel Tech
  4. ›
  5. 2021 Chassis Cab Guide

2021 Chassis Cab Work Truck Guide

2021 Model Year Ford, GM, Ram Chassis Cab Specs & Comparison

Models with a gross vehicle weight rating greater than 19,500 lbs are not covered in this guide and have been omitted. The vehicles discussed herein are class 3 to class 5 trucks, covering a GVWR range between 10,001 and 19,500 lbs. Exclusions include the Ford F-600, F-650, F-750, and Chevrolet Silverado 6500HD. All weight ratings and values are the maximum available for a properly equipped vehicle; actual ratings may vary and will depend on production selection, configuration, optional equipment, and upfit conditions.

GVWR Gross Vehicle Weight Rating. Maximum rated weight of a vehicle and its cargo, including passengers (excluding trailers). GCWR Gross Combined Weight Rating. Maximum rated combined weight of a vehicle, its cargo, and trailer(s).
FAWR Front Axle Weight Rating. Maximum rated weight that can be applied to the axle. RAWR Rear Axle Weight Rating. Maximum rated weight that can be applied to the axle.
Payload Maximum weight of combined cargo that a vehicle can carry (excluding trailers). Conventional Tow Maximum rated trailer weight when towing using a conventional "bumper pull" receiver hitch.
5th Wheel Tow Maximum rated trailer weight when towing using a 5th wheel hitch system. Gooseneck Tow Maximum rated trailer weight when using a gooseneck hitch system.
SRW Single rear wheel DRW Dual rear wheel
TBA To be announced; awaiting release of ratings from the manufacturer TBC To be confirmed; awaiting confirmation on ratings released from the manufacturer
2020 Chevrolet 3500HD chassis cab

2021 Chevrolet Silverado 3500HD/4500HD/5500HD Chassis cabs

Model Sierra/Silverado 3500HD Chassis Cab Silverado 4500HD Silverado 5500HD
Gas Engine GM 6.6L V-8 N/A - gas engine not available
Diesel Engine 6.6L Duramax V-8 L5P 6.6L Duramax V-8 L5D
Peak Horsepower (gas) 401 hp @ 5,200 rpm N/A - gas engine not available
Peak Torque (gas) 464 lb-ft @ 4,000 rpm N/A - gas engine not available
Peak Horsepower (diesel) 445 hp @ 2,800 rpm 350 hp @ 2,600 rpm
Peak Torque (diesel) 910 lb-ft @ 1,600 rpm 700 lb-ft @ 1,600 rpm
Transmission(s) GM 6L90 6 speed automatic (gas only)
Allison 10L1000 10 speed automatic (diesel only)		 Allison 1700/1750/2700 Series 6 speed automatic
Max GVWR 14,000 lbs 16,500 lbs 19,500 lbs
Max GCWR 24,000 - 40,000 lbs 26,000 - 37,000 lbs
Max FAWR 6,000 lbs 7,500 lbs 8,000 lbs
Max RAWR 10,400 lbs 15,500 lbs 15,500 lbs
Max Payload 7,571 lbs N/A - to be calculated after upfit using GVWR
Max Conventional Tow N/A - to be calculated after upfit using GCWR
Max 5th Wheel/Gooseneck Tow

2021 Ram 3500/4500/5500 Chassis Cabs

2020 Ram chassis cab trucks
Model Ram 3500 Chassis Cab, SRW Ram 3500 Chassis Cab, DRW Ram 4500 Chassis Cab Ram 5500 Chassis Cab
Gas Engine 6.4L Hemi V-8
Diesel Engine 6.7L Cummins I-6
Peak Horsepower (gas) 410 hp @ 5,600 rpm 370 hp @ 4,600 rpm
Peak Torque (gas) 429 lb-ft @ 4,000 rpm 429 lb-ft @ 4,000 rpm
Peak Horsepower (diesel) 360 hp @ 2,800 rpm
Peak Torque (diesel) 800 lb-ft @ 1,700 rpm
Transmission(s) Aisin AS66RC w/ 6.4L Hemi
Aisin AS69RC w/ 6.7L Cummins turbodiesel
Max GVWR 10,700 lbs 14,000 lbs 16,500 lbs 19,500 lbs
Max GCWR 24,000 lbs 33,000 lbs 37,500 lbs 43,000 lbs
Max FAWR 5,500 lbs 6,000 lbs 7,250 lbs 7,250 lbs
Max RAWR 6,800 lbs 9,850 lbs 12,000 lbs 13,500 lbs
Max Payload 4,230 lbs 7,750 lbs 9,690 lbs 12,510 lbs
Max Conventional Tow 18,950 lbs 23,000 lbs 23,000 lbs 23,000 lbs
Max Gooseneck/5th Wheel Tow 18,950 lbs 25,890 lbs 29,770 lbs 35,220 lbs
2020 Ford Super Duty chassis cab

2021 Ford F-350/F-450/F-550 Chassis Cabs

Model Ford F-350 Chassis Cab, SRW Ford F-350 Chassis Cab, DRW Ford F-450 Chassis Cab Ford F-550 Chassis Cab
Gas Engines 6.2L SOHC 2v V-8
7.3L DECVT 2v V-8		 7.3L DECVT 2v V-8
Diesel Engine 6.7L Power Stroke V-8
Peak Horsepower (gas) 385 hp @ 5,750 rpm (6.2L) 350 hp @ 3,900 rpm
350 hp @ 3,900 rpm (7.3L)
Peak Torque (gas) 430 lb-ft @ 3,800 rpm (6.2L) 468 lb-ft @ 3,900 rpm
468 lb-ft @ 3,900 rpm (7.3L
Peak Horsepower (diesel) 330 hp @ 2,600 rpm
Peak Torque (diesel) 825 lb-ft @ 2,000 rpm
Transmission TorqShift 10R140 10 speed automatic
Max GVWR 11,500 lbs 16,500 lbs 16,500 lbs 19,500 lbs
Max GCWR 30,000 lbs 32,500 lbs 35,000 lbs 40,000 lbs
Max FAWR 5,990 lbs 7,500 lbs 7,500 lbs 7,500 lbs
Max RAWR 7,230 lbs 12,880 lbs 12,880 lbs 14,706 lbs
Max Payload 4,970 lbs 8,800 lbs 9,850 lbs 12,750 lbs
Max Conventional Tow 13,500 lbs 17,500 lbs 17,500 lbs 18,500 lbs
Max 5th Wheel/Gooseneck Tow 22,700 lbs 24,700 lbs 26,600 lbs 31,600 lbs
More From Diesel Hub
2021 Diesel Pickup Guide - Power Stroke vs Cummins vs Duramax
Differences Between Chassis Cabs & Pickup Trucks
2020 Fullsize Diesel Pickup Guide
2020 Chassis Cab & Work Truck Guide

Sources: www.ford.com, www.chevrolet.com, www.gmc.com, www.ramtrucks.com