The specification desk
Find the right configuration. Search 34,354 chart rows transcribed from manufacturer towing guides. See the engine, cab, axle, required equipment, and source together. These are published comparison ratings; your truck’s equipment and loaded weight still matter.
A model missing here may have a published maximum without detailed chart rows. Check coverage or browse every cataloged model .
2025 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 4WD · Crew Cab · Long Bed
Equipment: Max Trailering Package; 18"/20" wheels
GVWR 11,050 lbs as printed.
Page 36, Silverado HD conventional and gooseneck/5th-wheel trailer weight ratings, 2500 HD Crew Cab / Long Bed 4x4 with Max Trailering Package / Duramax 6.6L Turbo-Diesel V8
Conventional 20,000lb GCWR 30,300 lb 2025 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 4WD · Crew Cab · Long Bed
Equipment: Max Trailering Package; 18"/20" wheels
GVWR 11,900 lbs as printed.
Page 36, Silverado HD conventional and gooseneck/5th-wheel trailer weight ratings, 2500 HD Crew Cab / Long Bed 4x4 with Max Trailering Package / Duramax 6.6L Turbo-Diesel V8
Conventional 20,000lb GCWR 30,000 lb 2025 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 2WD · Crew Cab · Standard Bed
Equipment: Max Trailering Package; 18"/20" wheels
GVWR 11,500 lbs as printed.
Page 34, Silverado HD conventional and gooseneck/5th-wheel trailer weight ratings, 2500 HD Crew Cab / Standard Bed 2WD with Max Trailering Package / Duramax 6.6L Turbo-Diesel V8
Conventional 20,000lb GCWR 30,000 lb 2025 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 4WD · Crew Cab · Standard Bed
Equipment: Max Trailering Package; 18"/20" wheels
GVWR 11,750 lbs as printed.
Page 34, Silverado HD conventional and gooseneck/5th-wheel trailer weight ratings, 2500 HD Crew Cab / Standard Bed 4x4 with Max Trailering Package / Duramax 6.6L Turbo-Diesel V8
Conventional 20,000lb GCWR 30,000 lb 2026 · OEM published maximum
6.6L Duramax turbo diesel V8 · 2WD · Crew Cab · 8-ft
Equipment: Max Trailering Package
Published available conventional maximum with required equipment. Rounded wheelbase from fleet guide. Payload and GVWR maxima in adjacent columns do not describe this diesel tow configuration.
PDF page 129: Crew Cab 2WD 8-ft, conventional column and footnotes 3–4
Conventional 20,000lb GCWR Not cited 2026 · OEM published maximum
6.6L Duramax turbo diesel V8 · 4WD · Crew Cab · 8-ft
Equipment: Max Trailering Package
Published available conventional maximum with required equipment. Rounded wheelbase from fleet guide. Payload and GVWR maxima in adjacent columns do not describe this diesel tow configuration.
PDF page 129: Crew Cab 4WD 8-ft, conventional column and footnotes 3–4
Conventional 20,000lb GCWR Not cited 2026 · OEM published maximum
6.6L Duramax turbo diesel V8 · 2WD · Crew Cab · 6-ft 9-in
Equipment: Max Trailering Package
Published available conventional maximum with required equipment. Rounded wheelbase from fleet guide. Payload and GVWR maxima in adjacent columns do not describe this diesel tow configuration.
PDF page 129: Crew Cab 2WD 6-ft 9-in, conventional column and footnotes 3–4
Conventional 20,000lb GCWR Not cited 2026 · OEM published maximum
6.6L Duramax turbo diesel V8 · 4WD · Crew Cab · 6-ft 9-in
Equipment: Max Trailering Package
Published available conventional maximum with required equipment. Rounded wheelbase from fleet guide. Payload and GVWR maxima in adjacent columns do not describe this diesel tow configuration.
PDF page 129: Crew Cab 4WD 6-ft 9-in, conventional column and footnotes 3–4
Conventional 20,000lb GCWR Not cited 2016 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 2WD · Crew Cab · Long Box · 3.73 axle
Equipment: Dually
Page 10, Silverado 2500HD and 3500HD conventional trailer weight ratings (Crew Cab), row 'Duramax 6.6L Turbo-Diesel V8' axle 3.73, column Crew Cab Long Box 2WD Dually
Conventional 20,000lb GCWR 31,100 lb 2016 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 4WD · Crew Cab · Long Box · 3.73 axle
Equipment: Dually
Page 10, Silverado 2500HD and 3500HD conventional trailer weight ratings (Crew Cab), row 'Duramax 6.6L Turbo-Diesel V8' axle 3.73, column Crew Cab Long Box 4X4 Dually
Conventional 20,000lb GCWR 31,100 lb 2016 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 2WD · Double Cab · Long Box · 3.73 axle
Equipment: Dually
Page 10, Silverado 2500HD and 3500HD conventional trailer weight ratings (4-Door Double Cab), row 'Duramax 6.6L Turbo-Diesel V8' axle 3.73, column Double Cab Long Box 2WD Dually
Conventional 20,000lb GCWR 31,100 lb 2016 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 4WD · Double Cab · Long Box · 3.73 axle
Equipment: Dually
Page 10, Silverado 2500HD and 3500HD conventional trailer weight ratings (4-Door Double Cab), row 'Duramax 6.6L Turbo-Diesel V8' axle 3.73, column Double Cab Long Box 4X4 Dually
Conventional 20,000lb GCWR 31,100 lb 2016 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 4WD · Regular Cab · Long Box · 3.73 axle
Equipment: Dually
Page 10, Silverado 2500HD and 3500HD conventional trailer weight ratings (Regular Cab), row 'Duramax� 6.6L Turbo-Diesel V8' axle 3.73, column Regular Cab Long Box 4X4 Dually
Conventional 20,000lb GCWR 31,100 lb 2017 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 2WD · Crew Cab · Long Box · 3.73 axle
Equipment: Dually
Page 11, Silverado 2500HD and 3500HD conventional trailer weight ratings (Crew Cab), row 'Duramax 6.6L Turbo-Diesel V8' axle 3.73, column Crew Cab Long Box 2WD Dually
Conventional 20,000lb GCWR 31,300 lb 2017 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 4WD · Crew Cab · Long Box · 3.73 axle
Equipment: Dually
Page 11, Silverado 2500HD and 3500HD conventional trailer weight ratings (Crew Cab), row 'Duramax 6.6L Turbo-Diesel V8' axle 3.73, column Crew Cab Long Box 4X4 Dually
Conventional 20,000lb GCWR 31,300 lb 2017 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 2WD · Double Cab · Long Box · 3.73 axle
Equipment: Dually
Page 11, Silverado 2500HD and 3500HD conventional trailer weight ratings (4-Door Double Cab), row 'Duramax 6.6L Turbo-Diesel V8' axle 3.73, column Double Cab Long Box 2WD Dually
Conventional 20,000lb GCWR 31,300 lb 2017 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 4WD · Double Cab · Long Box · 3.73 axle
Equipment: Dually
Page 11, Silverado 2500HD and 3500HD conventional trailer weight ratings (4-Door Double Cab), row 'Duramax 6.6L Turbo-Diesel V8' axle 3.73, column Double Cab Long Box 4X4 Dually
Conventional 20,000lb GCWR 31,300 lb 2017 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 4WD · Regular Cab · Long Box · 3.73 axle
Equipment: Dually
Page 11, Silverado 2500HD and 3500HD conventional trailer weight ratings (Regular Cab), row 'Duramax� 6.6L Turbo-Diesel V8' axle 3.73, column Regular Cab Long Box 4X4 Dually
Conventional 20,000lb GCWR 31,300 lb 2018 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 2WD · Crew Cab · Long Box · 3.73 axle
Equipment: Dually
Page 12, Silverado 2500HD and 3500HD conventional trailer weight ratings (Crew Cab), row 'Duramax 6.6L Turbo-Diesel V8' axle 3.73, column Crew Cab Long Box 2WD Dually
Conventional 20,000lb GCWR 31,300 lb 2018 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 4WD · Crew Cab · Long Box · 3.73 axle
Equipment: Dually
Page 12, Silverado 2500HD and 3500HD conventional trailer weight ratings (Crew Cab), row 'Duramax 6.6L Turbo-Diesel V8' axle 3.73, column Crew Cab Long Box 4X4 Dually
Conventional 20,000lb GCWR 31,300 lb 2018 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 2WD · Double Cab · Long Box · 3.73 axle
Equipment: Dually
Page 12, Silverado 2500HD and 3500HD conventional trailer weight ratings (4-Door Double Cab), row 'Duramax 6.6L Turbo-Diesel V8' axle 3.73, column Double Cab Long Box 2WD Dually
Conventional 20,000lb GCWR 31,300 lb 2018 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 4WD · Double Cab · Long Box · 3.73 axle
Equipment: Dually
Page 12, Silverado 2500HD and 3500HD conventional trailer weight ratings (4-Door Double Cab), row 'Duramax 6.6L Turbo-Diesel V8' axle 3.73, column Double Cab Long Box 4X4 Dually
Conventional 20,000lb GCWR 31,300 lb 2018 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 4WD · Regular Cab · Long Box · 3.73 axle
Equipment: Dually
Page 12, Silverado 2500HD and 3500HD conventional trailer weight ratings (Regular Cab), row 'Duramax� 6.6L Turbo-Diesel V8' axle 3.73, column Regular Cab Long Box 4X4 Dually
Conventional 20,000lb GCWR 31,300 lb 2019 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 2WD · Crew Cab · Long Box · 3.73 axle
Equipment: Dually
Page 12, Silverado 2500HD and 3500HD conventional trailer weight ratings (Crew Cab), row 'Duramax 6.6L Turbo-Diesel V8' axle 3.73, column Crew Cab Long Box 2WD Dually
Conventional 20,000lb GCWR 31,300 lb 2019 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 4WD · Crew Cab · Long Box · 3.73 axle
Equipment: Dually
Page 12, Silverado 2500HD and 3500HD conventional trailer weight ratings (Crew Cab), row 'Duramax 6.6L Turbo-Diesel V8' axle 3.73, column Crew Cab Long Box 4x4 Dually
Conventional 20,000lb GCWR 31,300 lb 2020 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 2WD · Crew Cab · Long Bed · 3.42 axle
Equipment: DRW; 17" wheels
Page 18, Silverado 2500 HD and 3500 HD conventional trailer weight ratings (Crew Cab), row 'Duramax 6.6L Turbo-Diesel V8' axle 3.42, column Crew Cab Long Bed 2WD DRW
Conventional 20,000lb GCWR 40,000 lb 2020 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 2WD · Crew Cab · Long Bed · 3.42 axle
Equipment: SRW; 18"/20" wheels
Page 18, Silverado 2500 HD and 3500 HD conventional trailer weight ratings (Crew Cab), row 'Duramax 6.6L Turbo-Diesel V8' axle 3.42, column Crew Cab Long Bed 2WD SRW
Conventional 20,000lb GCWR 29,700 lb 2020 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 4WD · Crew Cab · Long Bed · 3.42 axle
Equipment: DRW; 17" wheels
Page 18, Silverado 2500 HD and 3500 HD conventional trailer weight ratings (Crew Cab), row 'Duramax 6.6L Turbo-Diesel V8' axle 3.42, column Crew Cab Long Bed 4x4 DRW
Conventional 20,000lb GCWR 40,000 lb 2020 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 4WD · Crew Cab · Long Bed · 3.42 axle
Equipment: SRW; 18"/20" wheels
Page 18, Silverado 2500 HD and 3500 HD conventional trailer weight ratings (Crew Cab), row 'Duramax 6.6L Turbo-Diesel V8' axle 3.42, column Crew Cab Long Bed 4x4 SRW
Conventional 20,000lb GCWR 29,700 lb 2020 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 2WD · Crew Cab · Standard Bed · 3.42 axle
Equipment: SRW; 18"/20" wheels
Page 18, Silverado 2500 HD and 3500 HD conventional trailer weight ratings (Crew Cab), row 'Duramax 6.6L Turbo-Diesel V8' axle 3.42, column Crew Cab Standard Bed 2WD SRW
Conventional 20,000lb GCWR 29,700 lb 2020 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 4WD · Crew Cab · Standard Bed · 3.42 axle
Equipment: SRW; 18"/20" wheels
Page 18, Silverado 2500 HD and 3500 HD conventional trailer weight ratings (Crew Cab), row 'Duramax 6.6L Turbo-Diesel V8' axle 3.42, column Crew Cab Standard Bed 4x4 SRW
Conventional 20,000lb GCWR 29,700 lb 2020 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 2WD · Double Cab · Long Bed · 3.42 axle
Equipment: DRW; 17" wheels
Page 17, Silverado 2500 HD and 3500 HD conventional trailer weight ratings (Double Cab), row 'Duramax 6.6L Turbo-Diesel V8' axle 3.42, column Double Cab Long Bed 2WD DRW
Conventional 20,000lb GCWR 40,000 lb 2020 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 4WD · Double Cab · Long Bed · 3.42 axle
Equipment: DRW; 17" wheels
Page 17, Silverado 2500 HD and 3500 HD conventional trailer weight ratings (Double Cab), row 'Duramax 6.6L Turbo-Diesel V8' axle 3.42, column Double Cab Long Bed 4x4 DRW
Conventional 20,000lb GCWR 40,000 lb 2020 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 2WD · Regular Cab · Long Bed · 3.42 axle
Equipment: DRW; 17" wheels
Page 17, Silverado 2500 HD and 3500 HD conventional trailer weight ratings (Regular Cab), row 'Duramax 6.6L Turbo-Diesel V8' axle 3.42, column Regular Cab Long Bed 2WD DRW
Conventional 20,000lb GCWR 43,500 lb 2020 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 4WD · Regular Cab · Long Bed · 3.42 axle
Equipment: DRW; 17" wheels
Page 17, Silverado 2500 HD and 3500 HD conventional trailer weight ratings (Regular Cab), row 'Duramax 6.6L Turbo-Diesel V8' axle 3.42, column Regular Cab Long Bed 4x4 DRW
Conventional 20,000lb GCWR 43,500 lb 2021 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 2WD · Crew Cab · Long Bed
Equipment: DRW; 17" wheels
GVWR 14,000 lbs as printed.
Page 39, Silverado HD conventional and gooseneck/5th-wheel trailer weight ratings, 3500 HD CREW CAB / Long Bed 2WD DRW / Duramax 6.6L Turbo-Diesel V8
Conventional 20,000lb GCWR 40,000 lb 2021 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 2WD · Crew Cab · Long Bed
Equipment: SRW; 18"/20" wheels
GVWR 11,900 lbs as printed.
Page 39, Silverado HD conventional and gooseneck/5th-wheel trailer weight ratings, 3500 HD CREW CAB / Long Bed 2WD SRW / Duramax 6.6L Turbo-Diesel V8
Conventional 20,000lb GCWR 29,700 lb 2021 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 4WD · Crew Cab · Long Bed
Equipment: DRW; 17" wheels
GVWR 14,000 lbs as printed.
Page 39, Silverado HD conventional and gooseneck/5th-wheel trailer weight ratings, 3500 HD CREW CAB / Long Bed 4x4 DRW / Duramax 6.6L Turbo-Diesel V8
Conventional 20,000lb GCWR 40,000 lb 2021 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 4WD · Crew Cab · Long Bed
Equipment: High Country DRW; 17" wheels
GVWR 14,000 lbs as printed.
Page 39, Silverado HD conventional and gooseneck/5th-wheel trailer weight ratings, 3500 HD CREW CAB / Long Bed High Country 4x4 DRW / Duramax 6.6L Turbo-Diesel V8
Conventional 20,000lb GCWR 40,000 lb 2021 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 4WD · Crew Cab · Long Bed
Equipment: High Country SRW; 20" wheels
GVWR 12,250 lbs as printed.
Page 39, Silverado HD conventional and gooseneck/5th-wheel trailer weight ratings, 3500 HD CREW CAB / Long Bed High Country 4x4 SRW / Duramax 6.6L Turbo-Diesel V8
Conventional 20,000lb GCWR 29,700 lb 2021 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 4WD · Crew Cab · Long Bed
Equipment: SRW; 18"/20" wheels
GVWR 12,250 lbs as printed.
Page 39, Silverado HD conventional and gooseneck/5th-wheel trailer weight ratings, 3500 HD CREW CAB / Long Bed 4x4 SRW / Duramax 6.6L Turbo-Diesel V8
Conventional 20,000lb GCWR 29,700 lb 2021 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 2WD · Crew Cab · Standard Bed
Equipment: SRW; 18"/20" wheels
GVWR 11,750 lbs as printed.
Page 39, Silverado HD conventional and gooseneck/5th-wheel trailer weight ratings, 3500 HD CREW CAB / Standard Bed 2WD SRW / Duramax 6.6L Turbo-Diesel V8
Conventional 20,000lb GCWR 29,700 lb 2021 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 4WD · Crew Cab · Standard Bed
Equipment: High Country SRW; 20" wheels
GVWR 12,100 lbs as printed.
Page 39, Silverado HD conventional and gooseneck/5th-wheel trailer weight ratings, 3500 HD CREW CAB / Standard Bed High Country 4x4 SRW / Duramax 6.6L Turbo-Diesel V8
Conventional 20,000lb GCWR 29,700 lb 2021 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 4WD · Crew Cab · Standard Bed
Equipment: SRW; 18"/20" wheels
GVWR 12,100 lbs as printed.
Page 39, Silverado HD conventional and gooseneck/5th-wheel trailer weight ratings, 3500 HD CREW CAB / Standard Bed 4x4 SRW / Duramax 6.6L Turbo-Diesel V8
Conventional 20,000lb GCWR 29,700 lb 2021 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 2WD · Double Cab · Long Bed
Equipment: DRW; 17" wheels
GVWR 14,000 lbs as printed.
Page 38, Silverado HD conventional and gooseneck/5th-wheel trailer weight ratings, 3500 HD DOUBLE / Long Bed 2WD DRW / Duramax 6.6L Turbo-Diesel V8
Conventional 20,000lb GCWR 40,000 lb 2021 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 4WD · Double Cab · Long Bed
Equipment: DRW; 17" wheels
GVWR 14,000 lbs as printed.
Page 38, Silverado HD conventional and gooseneck/5th-wheel trailer weight ratings, 3500 HD DOUBLE / Long Bed 4x4 DRW / Duramax 6.6L Turbo-Diesel V8
Conventional 20,000lb GCWR 40,000 lb 2021 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 2WD · Regular Cab · Long Bed
Equipment: DRW; 17" (5th-Wheel) wheels
GVWR 14,000 lbs as printed.
Page 37, Silverado HD conventional and gooseneck/5th-wheel trailer weight ratings, 3500 HD REGULAR / Long Bed 2WD DRW / Duramax 6.6L Turbo-Diesel V8
Conventional 20,000lb GCWR 43,500 lb 2021 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 2WD · Regular Cab · Long Bed
Equipment: DRW; 17" (Gooseneck) wheels
GVWR 14,000 lbs as printed.
Page 37, Silverado HD conventional and gooseneck/5th-wheel trailer weight ratings, 3500 HD REGULAR / Long Bed 2WD DRW / Duramax 6.6L Turbo-Diesel V8
Conventional 20,000lb GCWR 43,900 lb 2021 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 4WD · Regular Cab · Long Bed
Equipment: DRW; 17" wheels
GVWR 14,000 lbs as printed.
Page 37, Silverado HD conventional and gooseneck/5th-wheel trailer weight ratings, 3500 HD REGULAR / Long Bed 4x4 DRW / Duramax 6.6L Turbo-Diesel V8
Conventional 20,000lb GCWR 40,000 lb 2022 · OEM chart
Duramax 6.6L Turbo-Diesel V8 · 2WD · Crew Cab · Long Bed
Equipment: DRW; 17" wheels
GVWR 14,000 lbs as printed.
Page 48, Silverado HD conventional and gooseneck/5th-wheel trailer weight ratings, 3500 HD CREW CAB / Long Bed 2WD DRW / Duramax 6.6L Turbo-Diesel V8
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