TowVerdict / 2026 GMC Sierra 3500HD
Can a 2026 GMC Sierra 3500HD tow a Fifth wheel (40ft)?
★ Official Verdict ★
Assuming the lowest-rated 2026 GMC Sierra 3500HD. Pick your engine for a real answer.
Conservative
Hard no.
This is a two-trip problem, not a one-truck problem.
2026 GMC Sierra 3500HDTow capacity: 14,500 lbsFifth wheel (40ft)Typical load: 17,000 lbs
Related checks
Estimates only. Check your door jamb sticker and owner's manual before towing anything.