The 2026 Colorado ZR2 Bison is an off-road package developed with American Expedition Vehicles. Its 35-inch tires and 12.2 inches of published ground clearance distinguish it from the standard ZR2, but they also change everyday fit, ride and towing considerations.
Information checked September 14, 2026 for U.S.-market vehicles. This is researched reference material, not a road test, repair diagnosis, sales quote or substitute for the exact owner’s manual and vehicle labels.
Quick answer and verified facts
| Item | What the evidence supports |
|---|---|
| Engine | 2.7L TurboMax, 310 hp and 430 lb-ft |
| Tires | 35-inch outside-diameter mud-terrain tires |
| Ground clearance | Up to 12.2 in |
| Reported tow limit | 6,000 lb for ZR2 configuration; verify the VIN label |
Bison hardware
The official Colorado page presents ZR2 as the most off-road-focused trim. Bison adds AEV equipment including beadlock-capable wheels and additional underbody protection. Published references describe hydraulic jounce control, larger tires and clearance beyond the regular ZR2. Verify the installed package on the window sticker.
For a purchase or maintenance decision, confirm the relevant detail on the exact VIN, window sticker, certification label or current manual. Model-wide headlines can hide trim, drivetrain and equipment restrictions.
Engine and transmission
Colorado uses one 2.7L TurboMax gasoline engine family for 2026, rated at 310 horsepower and 430 lb-ft, paired with an eight-speed automatic. Bison is not a diesel or hybrid. Its capability comes from chassis, tire and protection changes rather than a unique high-output engine.
For a purchase or maintenance decision, confirm the relevant detail on the exact VIN, window sticker, certification label or current manual. Model-wide headlines can hide trim, drivetrain and equipment restrictions.
Towing and payload tradeoffs
The general Colorado headline reaches 7,700 pounds, but competitor reviews place ZR2 at a lower 6,000-pound tow limit. Large tires, off-road suspension and configuration change ratings. Read the exact trailering and payload labels before selecting a trailer; do not apply the lineup maximum to Bison.
For a purchase or maintenance decision, confirm the relevant detail on the exact VIN, window sticker, certification label or current manual. Model-wide headlines can hide trim, drivetrain and equipment restrictions.
Daily-use considerations
Thirty-five-inch mud-terrain tires add height, noise, replacement cost and parking-garage concerns. Measure the vehicle with roof accessories, test entry height and inspect the spare. More clearance beneath the truck does not increase the height of a garage door.
For a purchase or maintenance decision, confirm the relevant detail on the exact VIN, window sticker, certification label or current manual. Model-wide headlines can hide trim, drivetrain and equipment restrictions.
Trail inspection and modifications
Check skid plates, bumpers, rocker protection, wheels, alignment and tire sidewalls after off-road use. Steps or accessories can reduce effective breakover or side clearance. Modifications can affect sensors, calibration, weight, warranty coverage and legal compliance; document every change.
For a purchase or maintenance decision, confirm the relevant detail on the exact VIN, window sticker, certification label or current manual. Model-wide headlines can hide trim, drivetrain and equipment restrictions.
Practical verification checklist
- Confirm the model year and full VIN; do not rely only on a listing headline.
- Match trim, drivetrain, cab or seating configuration and installed packages to the source specification.
- Request an itemized document for price, equipment or completed service.
- Check official recall resources and retain the result for the vehicle record.
- Recheck time-sensitive availability, incentives and ordering restrictions before committing.
Frequently asked questions
How much ground clearance does the ZR2 Bison have?
Published references list up to 12.2 inches.
Does it have 35-inch tires?
Yes, 35-inch outside-diameter mud-terrain tires are a defining feature.
Can it tow 7,700 pounds?
Do not assume the lineup maximum; ZR2 references indicate 6,000 pounds and the VIN label is decisive.
Is Bison a separate engine?
No. It is an off-road package using the Colorado's TurboMax gasoline powertrain.
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Bottom line
Choose Bison for its protection, tire and suspension package, not for the highest payload or quietest commute. Verify height and tow labels on the exact truck before buying accessories or a trailer.