The 1988–1998 GMT400 2500HD is a capable work truck that deserves capable tires. Whether you’re towing, hauling, or hitting trails, all-terrain tires are the best all-around choice for these trucks. Here are the top picks.
What to Look for in an AT Tire for a 2500HD:
- E-load (10-ply) rating for payload capacity
- M+S (Mud and Snow) designation
- Strong sidewalls to handle load stress
- Good wet and winter traction
- Acceptable highway noise for daily driving
Top Picks:
#1: BFGoodrich All-Terrain T/A KO2 – Best All-Rounder
The KO2 is the most popular AT tire in this segment for good reason. Excellent towing stability, good off-road capability, and reasonable highway manners.
BFGoodrich All-Terrain T/A KO2 – LT265/65R18/E – Available in most 2500HD fitment sizes including LT245/75R17E, LT265/70R17E, and LT285/70R17E.
#2: Firestone Transforce AT
Purpose-built for work trucks. Excellent towing stability and load ratings. Less aggressive off-road than the KO2 but excellent for pavement-primary use.
#3: Toyo Open Country AT3
A newer option with excellent reviews for both on and off-road. Good snow traction and aggressive tread design.
Common 2500HD Tire Sizes:
- 17" wheels: LT245/75R17E or LT265/70R17E (most common)
- 16" wheels: LT245/75R16E or LT265/75R16E
- 15" wheels: LT235/85R16E or LT31x10.50R15E
Load Rating Reminder:
2500HD trucks require E-load (10-ply) tires to maintain the truck’s rated payload capacity. Never downgrade to a lower load index tire on a heavy-duty truck.
Tread Life Expectations:
Quality AT tires on a 2500HD average 45,000–65,000 miles depending on load and driving style. Regular rotation (every 5,000–7,500 miles) extends life significantly.
What AT tires are you running on your GMT400 2500HD? How have they performed?