2018 GMC Sierra 3500HD towing capacity

Up to 20,000 lbs with a conventional ball hitch. That rating is for this configuration: 3500HD SERIES DOUBLE CAB LONG BOX DRW 2WD, DURAMAX 6.6L V-8 TURBO DIESEL, 2WD, 3.73 axle. The lowest-rated configuration in the same tables is 13,000 lbs, so the answer for your vehicle depends on how it is equipped.

Highest published rating20,000 lbsConventional (ball hitch). Lowest in the same tables: 13,000 lbs.

The top figure belongs to one specific build. Find the row that matches your engine, cab, drive and axle, and check the label on your driver's door jamb. Passengers and cargo in the truck come off what you can tow.

2018 GMC Sierra 3500HD towing capacity by engine

The highest rating published for each engine. Pick a figure to see every configuration behind it.

Engine	Conventional	Fifth-wheel or gooseneck	Configurations
DURAMAX 6.6L V-8 TURBO DIESEL	20,000 lbs	23,300 lbs	36
VORTEC 6.0L V-8	14,500 lbs	14,600 lbs	40

2018 GMC Sierra 3500HD towing capacity chart

All 76 configurations in the source, by hitch type and engine, highest rating first. Each row links to the page it is printed on.

Conventional (ball hitch)

2018 GMC Sierra 3500HD DURAMAX 6.6L V-8 TURBO DIESEL towing capacity, conventional hitch
Configuration	Drive	Axle	Max trailer	Source
3500HD SERIES DOUBLE CAB LONG BOX DRW 2WDautomatic	2WD	3.73	20,000 lbs	p. 20
3500HD SERIES CREW CAB LONG BOX DRW 2WDautomatic	2WD	3.73	20,000 lbs	p. 20
Denali, 3500 DENALI HD CREW CAB LONG BOX DRW 2WDautomatic	2WD	3.73	20,000 lbs	p. 20
3500HD SERIES REGULAR CAB LONG BOX DRW 4WDautomatic	4WD	3.73	20,000 lbs	p. 21
3500HD SERIES DOUBLE CAB LONG BOX DRW 4WDautomatic	4WD	3.73	20,000 lbs	p. 21
3500HD SERIES CREW CAB LONG BOX DRW 4WDautomatic	4WD	3.73	20,000 lbs	p. 21
Denali, 3500 DENALI HD CREW CAB LONG BOX DRW 4WDautomatic	4WD	3.73	20,000 lbs	p. 21
3500HD CREW CAB LONG BOX SRW 4WDautomatic	4WD	3.73	15,000 lbs	p. 21
Denali, 3500 DENALI HD CREW CAB LONG BOX SRW 4WDautomatic	4WD	3.73	15,000 lbs	p. 21
3500HD SERIES DOUBLE CAB LONG BOX SRW 2WDautomatic	2WD	3.73	14,500 lbs	p. 20
3500HD SERIES CREW CAB LONG BOX SRW 2WDautomatic	2WD	3.73	14,500 lbs	p. 20
Denali, 3500 DENALI HD CREW CAB LONG BOX SRW 2WDautomatic	2WD	3.73	14,500 lbs	p. 20
3500HD SERIES REGULAR CAB LONG BOX SRW 4WDautomatic	4WD	3.73	14,500 lbs	p. 21
3500HD SERIES DOUBLE CAB LONG BOX SRW 4WDautomatic	4WD	3.73	14,500 lbs	p. 21
3500HD SERIES CREW CAB STANDARD BOX SRW 2WDautomatic	2WD	3.73	13,000 lbs	p. 20
Denali, 3500 DENALI HD CREW CAB STANDARD BOX SRW 2WDautomatic	2WD	3.73	13,000 lbs	p. 20
3500HD SERIES CREW CAB STANDARD BOX SRW 4WDautomatic	4WD	3.73	13,000 lbs	p. 21
Denali, 3500 DENALI HD CREW CAB STANDARD BOX SRW 4WDautomatic	4WD	3.73	13,000 lbs	p. 21

2018 GMC Sierra 3500HD VORTEC 6.0L V-8 towing capacity, conventional hitch
Configuration	Drive	Axle	Max trailer	Source
3500HD SERIES REGULAR CAB LONG BOX SRW 2WDautomatic	2WD	4.10	14,500 lbs	p. 20
3500HD SERIES REGULAR CAB LONG BOX DRW 2WDautomatic	2WD	4.10	14,300 lbs	p. 20
3500HD SERIES REGULAR CAB LONG BOX SRW 4WDautomatic	4WD	4.10	14,300 lbs	p. 21
3500HD SERIES DOUBLE CAB LONG BOX SRW 2WDautomatic	2WD	4.10	14,200 lbs	p. 20
3500HD SERIES CREW CAB LONG BOX SRW 2WDautomatic	2WD	4.10	14,100 lbs	p. 20
Denali, 3500 DENALI HD CREW CAB LONG BOX SRW 2WDautomatic	2WD	4.10	14,100 lbs	p. 20
3500HD SERIES REGULAR CAB LONG BOX DRW 4WDautomatic	4WD	4.10	14,000 lbs	p. 21
3500HD SERIES DOUBLE CAB LONG BOX SRW 4WDautomatic	4WD	4.10	13,900 lbs	p. 21
3500HD SERIES DOUBLE CAB LONG BOX DRW 2WDautomatic	2WD	4.10	13,800 lbs	p. 20
3500HD SERIES CREW CAB LONG BOX DRW 2WDautomatic	2WD	4.10	13,700 lbs	p. 20
Denali, 3500 DENALI HD CREW CAB LONG BOX DRW 2WDautomatic	2WD	4.10	13,700 lbs	p. 20
3500HD CREW CAB LONG BOX SRW 4WDautomatic	4WD	4.10	13,700 lbs	p. 21
Denali, 3500 DENALI HD CREW CAB LONG BOX SRW 4WDautomatic	4WD	4.10	13,700 lbs	p. 21
3500HD SERIES DOUBLE CAB LONG BOX DRW 4WDautomatic	4WD	4.10	13,600 lbs	p. 21
3500HD SERIES CREW CAB LONG BOX DRW 4WDautomatic	4WD	4.10	13,400 lbs	p. 21
Denali, 3500 DENALI HD CREW CAB LONG BOX DRW 4WDautomatic	4WD	4.10	13,400 lbs	p. 21
3500HD SERIES CREW CAB STANDARD BOX SRW 2WDautomatic	2WD	4.10	13,000 lbs	p. 20
Denali, 3500 DENALI HD CREW CAB STANDARD BOX SRW 2WDautomatic	2WD	4.10	13,000 lbs	p. 20
3500HD SERIES CREW CAB STANDARD BOX SRW 4WDautomatic	4WD	4.10	13,000 lbs	p. 21
Denali, 3500 DENALI HD CREW CAB STANDARD BOX SRW 4WDautomatic	4WD	4.10	13,000 lbs	p. 21

Fifth-wheel or gooseneck

2018 GMC Sierra 3500HD DURAMAX 6.6L V-8 TURBO DIESEL towing capacity, fifth-wheel or gooseneck hitch
Configuration	Drive	Axle	Max trailer	Source
3500HD SERIES REGULAR CAB LONG BOX DRW 4WDautomatic	4WD	3.73	23,300 lbs	p. 21
3500HD SERIES DOUBLE CAB LONG BOX DRW 2WDautomatic	2WD	3.73	23,200 lbs	p. 20
3500HD SERIES CREW CAB LONG BOX DRW 2WDautomatic	2WD	3.73	23,100 lbs	p. 20
Denali, 3500 DENALI HD CREW CAB LONG BOX DRW 2WDautomatic	2WD	3.73	23,100 lbs	p. 20
3500HD SERIES DOUBLE CAB LONG BOX DRW 4WDautomatic	4WD	3.73	22,900 lbs	p. 21
3500HD SERIES CREW CAB LONG BOX DRW 4WDautomatic	4WD	3.73	22,700 lbs	p. 21
Denali, 3500 DENALI HD CREW CAB LONG BOX DRW 4WDautomatic	4WD	3.73	22,700 lbs	p. 21
3500HD SERIES REGULAR CAB LONG BOX SRW 4WDautomatic	4WD	3.73	17,600 lbs	p. 21
3500HD SERIES DOUBLE CAB LONG BOX SRW 2WDautomatic	2WD	3.73	17,500 lbs	p. 20
3500HD SERIES CREW CAB STANDARD BOX SRW 2WDautomatic	2WD	3.73	17,500 lbs	p. 20
Denali, 3500 DENALI HD CREW CAB STANDARD BOX SRW 2WDautomatic	2WD	3.73	17,500 lbs	p. 20
3500HD SERIES CREW CAB LONG BOX SRW 2WDautomatic	2WD	3.73	17,400 lbs	p. 20
Denali, 3500 DENALI HD CREW CAB LONG BOX SRW 2WDautomatic	2WD	3.73	17,400 lbs	p. 20
3500HD SERIES DOUBLE CAB LONG BOX SRW 4WDautomatic	4WD	3.73	17,200 lbs	p. 21
3500HD SERIES CREW CAB STANDARD BOX SRW 4WDautomatic	4WD	3.73	17,200 lbs	p. 21
Denali, 3500 DENALI HD CREW CAB STANDARD BOX SRW 4WDautomatic	4WD	3.73	17,200 lbs	p. 21
3500HD CREW CAB LONG BOX SRW 4WDautomatic	4WD	3.73	17,000 lbs	p. 21
Denali, 3500 DENALI HD CREW CAB LONG BOX SRW 4WDautomatic	4WD	3.73	17,000 lbs	p. 21

2018 GMC Sierra 3500HD VORTEC 6.0L V-8 towing capacity, fifth-wheel or gooseneck hitch
Configuration	Drive	Axle	Max trailer	Source
3500HD SERIES REGULAR CAB LONG BOX SRW 2WDautomatic	2WD	4.10	14,600 lbs	p. 20
3500HD SERIES REGULAR CAB LONG BOX DRW 2WDautomatic	2WD	4.10	14,300 lbs	p. 20
3500HD SERIES REGULAR CAB LONG BOX SRW 4WDautomatic	4WD	4.10	14,300 lbs	p. 21
3500HD SERIES DOUBLE CAB LONG BOX SRW 2WDautomatic	2WD	4.10	14,200 lbs	p. 20
3500HD SERIES CREW CAB STANDARD BOX SRW 2WDautomatic	2WD	4.10	14,200 lbs	p. 20
Denali, 3500 DENALI HD CREW CAB STANDARD BOX SRW 2WDautomatic	2WD	4.10	14,200 lbs	p. 20
3500HD SERIES CREW CAB LONG BOX SRW 2WDautomatic	2WD	4.10	14,000 lbs	p. 20
Denali, 3500 DENALI HD CREW CAB LONG BOX SRW 2WDautomatic	2WD	4.10	14,000 lbs	p. 20
3500HD SERIES REGULAR CAB LONG BOX DRW 4WDautomatic	4WD	4.10	13,900 lbs	p. 21
3500HD SERIES DOUBLE CAB LONG BOX SRW 4WDautomatic	4WD	4.10	13,900 lbs	p. 21
3500HD SERIES CREW CAB STANDARD BOX SRW 4WDautomatic	4WD	4.10	13,900 lbs	p. 21
Denali, 3500 DENALI HD CREW CAB STANDARD BOX SRW 4WDautomatic	4WD	4.10	13,900 lbs	p. 21
3500HD SERIES DOUBLE CAB LONG BOX DRW 2WDautomatic	2WD	4.10	13,800 lbs	p. 20
3500HD SERIES CREW CAB LONG BOX DRW 2WDautomatic	2WD	4.10	13,700 lbs	p. 20
Denali, 3500 DENALI HD CREW CAB LONG BOX DRW 2WDautomatic	2WD	4.10	13,700 lbs	p. 20
3500HD CREW CAB LONG BOX SRW 4WDautomatic	4WD	4.10	13,700 lbs	p. 21
Denali, 3500 DENALI HD CREW CAB LONG BOX SRW 4WDautomatic	4WD	4.10	13,700 lbs	p. 21
3500HD SERIES DOUBLE CAB LONG BOX DRW 4WDautomatic	4WD	4.10	13,500 lbs	p. 21
3500HD SERIES CREW CAB LONG BOX DRW 4WDautomatic	4WD	4.10	13,300 lbs	p. 21
Denali, 3500 DENALI HD CREW CAB LONG BOX DRW 4WDautomatic	4WD	4.10	13,300 lbs	p. 21

Common questions

Which 2018 GMC Sierra 3500HD engine tows the most?

DURAMAX 6.6L V-8 TURBO DIESEL, at up to 20,000 lbs. Next is VORTEC 6.0L V-8 at up to 14,500 lbs.

Can a 2018 GMC Sierra 3500HD tow a fifth-wheel or gooseneck trailer?

The manufacturer publishes fifth-wheel or gooseneck ratings for it, up to 23,300 lbs. They are listed by configuration above.

Where do these numbers come from?

From 2018 GMC Trailering Guide. Each row in the tables above links to the document and gives the page the figure is printed on.

Towing equipment for the 2018 GMC Sierra 3500HD

Parts sold to fit this vehicle. Fitting one does not raise a rating, and the tables above say what each rating needs.

Trailer wiring harness for the 2018 GMC Sierra 3500HD. See on Amazon (paid link)
Trailer hitch receiver for the 2018 GMC Sierra 3500HD. See on Amazon (paid link)

As an Amazon Associate we earn from qualifying purchases. The ratings on this page come only from the documents cited.

Where these numbers come from

2018 GMC Trailering Guide, GMC. Manufacturer towing guide. Retrieved October 3, 2026.

Page numbers count pages in the linked file, which can differ from the number printed in the corner. Report a number that looks wrong.

Related ratings

2019 GMC Sierra 3500HD towing capacity
2017 GMC Sierra 3500HD towing capacity
Every year of the GMC Sierra 3500HD
Other pickup trucks that can tow 20,000 lbs
2018 GMC Sierra 2500HD, up to 14,500 lbs
2018 GMC Sierra 1500, up to 12,500 lbs
2018 GMC Savana Cargo, up to 10,000 lbs
2018 GMC Savana Passenger, up to 9,400 lbs
2018 GMC Yukon, up to 8,500 lbs