Chevrolet has taken it to the next level with their ZR2 Bison lineup. This isn’t just a trio of trucks; it’s a statement of off-road prowess and on-road comfort. We’re talking about the Colorado ZR2 Bison, the Silverado ZR2 Bison, and the all-new 2024 Silverado HD ZR2 Bison. I had the privilege of taking these beasts for a spin, and let me tell you, they’re as exciting as they sound. Buckle up as we dive into the nitty-gritty of what makes these trucks the ultimate off-road machines.

The Chevy Colorado ZR2 Bison and Silverado HD ZR2 Bison
The Chevy Colorado ZR2 Bison and Silverado HD ZR2 Bison

What Is A ZR2 Bison?

The ZR2 badge isn’t just for show; it’s a symbol of Chevrolet’s commitment to high-performance, off-road trucks. Each ZR2 model is intended as the ultimate off-road version of that model. You can’t get any more serious about off-roading if you’ve picked a ZR2 trim-level Silverado or Colorado. By adding on the Bison level, you’re taking it even further- with American Expedition Vehicles aftermarket accessories installed standard from the factory. Steel bumpers, extra skidplates, and specialty details enhance the ability already baked into each ZR2 model.

AEV Badge On A Silverado ZR2 Bison
The ZR2 Bison Lineup was engineered with help from American Expedition Vehicles (AEV)

Chevrolet isn’t just producing the ZR2 for fun, either. It turns out that the ZR2 brand is a magnet for younger buyers, with 19% of LD ZR2 buyers under age 35. It’s also a brand switcher; nearly half of Colorado ZR2 buyers came from competing brands. The ZR2 lineup is designed to serve an avid customer base that loves outdoor recreation and hitting the trails.

Chevrolet didn’t just slap on some off-road tires and call it a day. They partnered with Chad Hall Racing to rigorously test these trucks. The Colorado ZR2 race truck has 12,000 racing miles and has finished every off-road race entered since 2017. The Silverado ZR2 isn’t far behind with over 6,000 racing miles and 22 race wins. This is real-world, battle-tested performance we’re talking about. Both the Colorado and Silverado ZR2 share numerous components with their Hall Race truck counterparts, including frame, suspension, steering, brakes, and more. This isn’t just marketing fluff; it’s technology transfer at its finest.

Colorado ZR2 Bison

Chevy Colorado ZR2 Bison in a desert setting with mountains behind it
Chevy Colorado ZR2 Bison in Johnson Valley, California

On Road
The Colorado ZR2 Bison is a head-turner, thanks to its aggressive 35-inch tires. But it’s not just about the looks; this truck offers a composed ride with DSSV dampers that adapt to a wide range of surfaces. Whether you’re dodging potholes or overtaking on the highway, the Colorado ZR2 Bison has got you covered. The steering is precise, and the brakes offer plenty of bite, making it a joy to drive in urban settings.

The interior of the Chevrolet Colorado ZR2 Bison
Interior of the Chevrolet Colorado ZR2 Bison

The interior is equally impressive, offering a level of comfort and styling that is in sync with its bigger brothers. The infotainment system is intuitive, and the cabin is well-insulated from road noise, making long drives a breeze. The seats are supportive, and there’s ample room for both the driver and passengers, making it a practical choice for daily commuting.

The 2024 Colorado ZR2 Bison rock crawling on an off-road trail

Off Road
This is where the Colorado ZR2 Bison truly shines. It’s the “sports car” of the desert, absorbing whatever you throw at it—rocky accents, undulating trails, you name it. The jounce control dampers might be a bit noisy, but they provide a soft landing every time. The truck’s low center of gravity and wide track make it stable on steep inclines and declines.

Rock Crawling With The Colorado ZR2 Bison
Rock Crawling With The Colorado ZR2 Bison

The extra skid plate protection is a boon, allowing you to push the boundaries without worrying about damaging vital components. The Baja mode is the cherry on top, allowing you to slide around corners and whip the tail out with ease. The front and rear locking differentials give you extra traction when you need it, making it a formidable off-road machine.

Silverado ZR2 Bison

The Chevrolet Silverado ZR2 Bison Is At Home Off-Road

On Road
The Silverado ZR2 Bison sets a new standard for comfort among Silverados. The DSSV dampers offer a superior level of control, making it a joy to drive on any surface. The truck comes with two engine options: a 3.0L Duramax Diesel for low-speed crawling and a 6.2L V8 for high-speed thrills. The diesel option is particularly impressive, offering excellent fuel efficiency without sacrificing torque.

The cabin is spacious and luxurious, with high-quality materials and an advanced infotainment system. The driver assistance features, such as adaptive cruise control and lane-keeping assist, make long drives less taxing. The truck also offers multiple storage options, making it practical for both work and leisure.

Front three-quarter view of the 2024 Silverado ZR2

Off Road
The Silverado ZR2 Bison takes all the good stuff from the Colorado and scales it up. It’s heavier but equally respectable in its off-road capabilities. It devours rocky and uneven terrain with ease, thanks to its robust suspension system. The truck’s high ground clearance allows it to wade through water obstacles without breaking a sweat.

The Multi-Flex tailgate is a handy feature when you’re out in the wilderness, doubling as a workbench or a seat. The truck also offers excellent towing capabilities, making it perfect for those who want to bring along ATVs or dirt bikes for an adventurous weekend. The front and rear locking differentials ensure that you’re never stuck, no matter how challenging the terrain.

Silverado HD ZR2 Bison

Silverado HD With A Camper Attached
Towing with the Silverado HD ZR2 Bison Is No Big Deal While Being a BIG deal

On Road
The Silverado HD ZR2 Bison is a beast, offering up to 18,500lbs of towing capacity. The diesel exhaust alone will get your adrenaline pumping. Despite being an HD, the DSSV dampers do a decent job of smoothing out the ride. The Allison 10-speed automatic transmission shifts smoothly, ensuring that you always have the right amount of power at your disposal.

The Silverado HD ZR2 Bison Can Go Just About Anywhere – If The Trail Is Wide Enough

The interior is equally impressive, with a focus on functionality and comfort. The seats are plush, and the infotainment system is top-notch, offering features like Apple CarPlay and Android Auto. The truck also comes with multiple USB ports and a 120V outlet, making it a mobile office for those who need to stay connected on the go.

Off Road
The Silverado HD ZR2 Bison is the biggest vehicle you’d still want to take off-road. It’s more composed and capable than you’d imagine, but it’s not as nimble as its smaller siblings. The truck’s sheer size can be a challenge in narrow trails, but its off-road capabilities are still commendable. The DSSV dampers and robust suspension system ensure a smooth ride, even on the roughest terrains.

The Silverado HD ZR2 Bison has an aggressive and unique face- ready for anything

One downside is the lack of rock sliders, which Chevrolet should consider adding in future models. However, the truck makes up for it with its incredible towing capacity, allowing you to bring along a trailer or even a small boat for your off-road adventures. The integrated trailer brake controller and trailer sway control make towing a breeze, ensuring that you’re always in control.

Should You Buy A Chevrolet ZR2 Bison?

ZR2 + Duramax Diesel = Ultimate Off Road Capability

Chevrolet’s ZR2 Bison lineup is a game-changer in the off-road truck market. These trucks offer an incredibly wide range of capabilities without any apparent compromises. Whether you’re a hardcore off-road enthusiast or a weekend warrior, there’s a ZR2 Bison for you. They may not be the most powerful off-road trucks out there (Yes, the Raptor and TRX have them beat in sheer horsepower), but they are demonstrably the most capable and daily drivable—a killer combo that no other brand can match. From narrow trails to wide-open deserts, the Chevrolet ZR2 lineup will meet and exceed any obstacle you throw at it.

Front view of the Chevy ZR2 truck family
Front view of the Chevy ZR2 truck family

Chevrolet Colorado ZR2 and ZR2 Bison Specifications, Capacities, & Statistics


Not yet available


21 gallons / 79 liters


Type: 2.7L I-4 Turbo High-Output DOHC VVT DI with Active Fuel Management and Stop/Start
Bore & Stroke (in. / mm): 3.63 x 4.01 / 92.25 x 102
Block Material: Cast aluminum
Cylinder Head Material:  Cast aluminum
Valvetrain:  Dual-overhead camshafts, four valves per cylinder, Tripower valvetrain with continuously variable valve timing, variable valve lift and Active Fuel Management
Fuel Delivery:  Direct high-pressure fuel injection with Active Fuel Management
Horsepower (hp / kW @ rpm): 310 / 231 @ 5600 
Torque (lb.-ft. / Nm @ rpm): 430 / 569 @ 3000 (GM est.) 


Type: Hydra-Matic 8L90 eight-speed automatic 
Gear Ratios (:1)
    First: 4.56
    Second: 2.97
    Third: 2.08
    Fourth: 1.69
    Fifth: 1.27
    Sixth: 1.00
    Seventh: 0.85
    Eighth: 0.65
    Reverse: 4.56
Final Drive Ratio: 3.42 


Front Suspension: Independent coil-over-shock with Multimatic DSSV dampers; Multimatic Jounce Control Dampers on Bison
Rear Suspension: Solid axle with semi-elliptic two-stage multi-leaf springs and Multimatic DSSV dampers; Multimatic Jounce Control Dampers on Bison
Rear axle:  Power-locking front and rear differentials 
Steering Type: Electric power-assisted rack-and-pinion
Brake Type: Power-assisted four-wheel discs with Duralife™ long-life brake rotors; standard ABS; hill descent control 
Wheel Size: 17 x 8-in. aluminum (ZR2)

17 x 8.5-in. aluminum (ZR2 Bison)

Tire Size: LT285/70R17 MT – 33-in. OD (ZR2) 

LT315/70R17 MT – 35-in. OD (ZR2 Bison) 


Wheelbase (in. / mm): 131 / 3338
Overall Length (in. / mm): 212.7 / 5402 – ZR2 

214.1 / 5437 – ZR2 Bison 

Overall Width (in. / mm): 84.4 / 2144 (with mirrors)

80.2 / 1938 (without mirrors)

Overall Height (in. / mm): 81.8 / 2078 
Track (in. / mm): 66.3 / 1684 (front)

66.3 / 1684 (rear)

Ground Clearance (in. / mm): 10.7 / 272 – ZR2 

12.2 / 311 – ZR2 Bison 

Approach Angle (deg.): 38.6 – ZR2

38.2 – ZR2 Bison

Departure Angle (deg.): 25.2 – ZR2

26.0 – ZR2 Bison

Breakover Angle (deg.): 24.8 – ZR2

26.9 – ZR2 Bison


Headroom (in. / mm): 40.3 / 1024 (front)

38.3 / 973 (rear)

Legroom (in. / mm): 45.2 / 1148 (front)

34.7 / 881 (rear)

Shoulder Room (in. / mm): 57.4 / 1458 (front)

56.3 / 1430 (rear)

Hip Room (in. / mm): 54.7 / 1389 (front)

53.1 / 1349 (rear)


Curb Weight (lb. / kg):  4940 / 2241 – ZR2 

5265 / 2388 – ZR2 Bison

GVWR (lb. / kg)1: 6250 / 2835 – ZR2 

6350 / 2880 – ZR2 Bison

Max Payload (lb. / kg)2: 1280 / 581 – ZR2 

1050 / 476– ZR2 Bison

Max Trailering (lb. / kg)3: 6000 / 2722 – ZR2 

5500 / 2495 – ZR2 Bison

Chevrolet Silverado ZR2 and ZR2 Bison Specifications, Capacities, & Statistics


6.2L:  14 city / 17 hwy 
3.0L Diesel:  20 city / 22 hwy


24 gal. / 91 liters


Type: 3.0L DOHC I-6 Turbo-Diesel
Bore & Stroke (in. / mm): 3.30 x 3.54 / 84 x 90
Block Material: Cast aluminum
Cylinder Head Material:  Cast aluminum
Valvetrain:  Dual-overhead camshafts, four-valves per cylinder
Fuel Delivery:  High-pressure, common-rail direct injection; electronic throttle valve

(hp / kW @ rpm):

305 / 227 @ 3750 (GM est.)
(lb.-ft. / Nm @ rpm):
495 / 671 @ 2750 (GM est.)


Type: 6.2L V-8 VVT DI with Dynamic Fuel Management 
Bore & Stroke (in. / mm): 4.06 x 3.62 / 103.25 x 92
Block Material: Cast aluminum
Cylinder Head Material:  Cast aluminum
Valvetrain:  Overhead valve, two valves per cylinder, variable valve timing
Fuel Delivery:  Direct high-pressure fuel injection with Dynamic Fuel Management
(hp / kW @ rpm):
420 / 313 @ 5600 

(tested per SAE J1349 rev. SEP2011)


(lb.-ft. / Nm @ rpm):

460 / 624 @ 4100 

(tested per SAE J1349 rev. SEP2011)


Type: 10L80 10-speed automatic 
Gear Ratios (:1):
    First 4.696
    Second 2.985
    Third 2.156
    Fourth 1.779
    Fifth 1.526
    Sixth 1.278
    Seventh 1.000
    Eighth 0.854
    Ninth 0.689
    Tenth 0.636
      Reverse 4.866
Axle Ratio: 3.23 (3.0L & 6.2L)


Front Suspension: High-performance lifted suspension with independent coil-over-shock with Multimatic DSSV™ dampers 
Rear Suspension: High-performance lifted suspension with solid axle and semi-elliptic, variable-rate, two-stage multileaf springs and Multimatic DSSV™ dampers 
Steering Type: Electric power-assisted rack-and-pinion
Brake Type: Four-wheel disc with electro-hydraulic power assist and ABS; vented front and rear DuralifeTM rotors
Brake Rotor Size (in. / mm): 13 x 1.18 / 330 x 30 (front)
13.6 x 0.79 / 345 x 20 (rear)
Wheel Size: 18-in. x 8.5-in. aluminum machined face (std.)

18-in. x 8.5-in. aluminum gloss black (avail.)

18-in. x 8.5-in. aluminum AEV gloss black (Bison)

Tire Size: LT275/70R18 Goodyear Wrangler Territory MT


Wheelbase (in. / mm): 147.8 / 3754 
Overall Length (in. / mm): 232.7 / 5912 (ZR2)

233.9 / 5943 (ZR2 Bison) 

Overall Width (in. / mm): 97.2 / 2478 (with mirrors)

84.9 / 2157 (mirrors folded)

Overall Height (in. / mm): 78.2 / 1998
Track Width (in. / mm): 68.5 / 1740 (front)

68.2 / 1732 (rear)


Ground Clearance 

(in. / mm):

11.2 / 285 (ZR2)

11.3 / 289 (ZR2 Bison)

Approach Angle (deg.): 33.5 (ZR2)

34 (ZR2 Bison) 

Departure Angle (deg.): 24.4 (ZR2)

24.4 (ZR2 Bison) 

Breakover Angle (deg.): 24.9 (ZR2)

24.4 (ZR2 Bison) 


Headroom (in. / mm): 43.0 / 1093 (front)
40.1 / 1019 (rear)
Legroom (in. / mm): 44.5 / 1131 (front)
43.4 / 1102 (rear)
Shoulder Room (in. / mm): 64.5 / 1639 (front)
64.0 / 1626 (rear)
Hip Room (in. / mm): 61.2 / 1554 (front)
59.2 / 1505 (rear)


Base Curb Weight (lb. / kg):  5709 / 2589 (3.0L ZR2)

6121 / 2776 (3.0L ZR2 Bison)     

5540 / 2513 (6.2L ZR2)

5952 / 2699 (6.2L ZR2 Bison)     

Max GVWR1 (lb. / kg):  7300 / 3311 (3.0L ZR2)

7300 / 3311  (3.0L ZR2 Bison)     

7100 / 3221 (6.2L ZR2)      

7100 / 3221  (6.2L ZR2 Bison)        

Max Payload2 (lb. / kg): 1550 / 703 (3.0L ZR2)

1140 / 517 (3.0L ZR2 Bison)

1520 / 689 (6.2L ZR2)   

1110 / 503 (6.2L ZR2 Bison)     


Max Trailering (lb. / kg):          8700 / 3946 (3.0L)

8800 / 3991 (6.2L)         

Chevrolet Silverado HD ZR2 and ZR2 Bison Specifications, Capacities, & Statistics

2500HD  Crew Cab Standard Bed (4WD)


Type: 6.6L V-8 gasoline or E85 FlexFuel
Bore & Stroke (in. / mm): 4.06 x 3.86 / 103.25 x 98
Block Material: Cast iron with nodular iron main caps
Cylinder Head Material: Cast aluminum
Compression Ratio: 10.8:1
Valvetrain:  Overhead-valve, two valves per cylinder, variable valve timing
Fuel Delivery:  Direct fuel injection
(hp / kW @ rpm):
401 / 299 @ 5200 (SAE certified – gasoline)
(lb.-ft. / Nm @ rpm):
464 / 629 @ 4000 (SAE certified – gasoline)


Type: Duramax 6.6L V-8 Turbo-Diesel
Bore & Stroke (in. / mm): 4.05 x 3.89 / 103 x 99
Block Material: Cast iron
Cylinder Head Material: Cast aluminum
Compression Ratio: 16.0:1
Valvetrain:  Overhead-valve, four valves per cylinder
Fuel Delivery:  Common-rail direct fuel injection 

(hp / kW @ rpm):

470 / 350 @ 2800 (per SAE J1349)
(lb.-ft. / Nm @ rpm):
975 / 1322 @ 1600 (per SAE J1349)


Type: Allison® 10L1000 10-speed automatic 
Gear Ratios (:1):
    First 4.54
    Second 2.87
    Third 2.06
    Fourth 1.72
    Fifth 1.48
    Sixth 1.26
    Seventh 1.00
    Eighth 0.85
    Ninth 0.69
    Tenth 0.63
    Reverse 4.54
Final Drive Ratio: 3.73 (6.6L gas)

3.42 (6.6L diesel)


Front Suspension: Short long arms independent front suspension with torsion bars
Rear Suspension: Semi-elliptic, two-stage multi-leaf springs
Steering Type: Hydraulic power-assisted recirculating ball
Brake Type: Hydraulic power-assisted Hydroboost brake booster, four-wheel disc brakes with ABS and Stabilitrak electronic stability assist
Brake Rotor Size (in. / mm): Front: 14 x 1.6 / 355 x 40
Rear: 14.1 x 1.3 / 360 x 34 
Wheel Size: 18 x 9-in. aluminum
Tire Size: LT305/70R18 MT


Fuel Tank (gal. / L):  36 / 136 (gas and diesel)


Wheelbase (in. / mm): 159.1 / 4042
Overall Length (in. / mm): 250 / 6351 (ZR2)
252 / 6401 (ZR2 Bison)
Overall Width (in. / mm): 81.9 / 2079 (without mirrors)
105.1 / 2670 (with mirrors extended)
Overall Height (in. / mm): 82.6 / 2100
Front Track (in. / mm): 69.3 / 1762
Rear Track (in. / mm): 70.0 / 1760
Ground Clearance (in. / mm): 11.6 / 295 (ZR2)
11.8 / 299 (ZR2 Bison)
Approach Angle (deg.): 32.5 (ZR2)
29.8 (ZR2 Bison)
Departure Angle (deg.): 25.7 (ZR2 & ZR2 Bison)
Breakover Angle (deg.): 21.2 (ZR2)
22.6 (ZR2 Bison)


Headroom (in. / mm): 43.03 / 1093 (front)
40.12 / 1019 (rear)
Legroom (in. / mm): 44.53 / 1131 (front)
43.4 / 1102 (rear)
Shoulder Room (in. / mm): 66.02 / 1677 (front)
65.3 / 1659 (rear)
Hip Room (in. / mm): 61.18 / 1554 (front)
60.24 / 1530 (rear)


Base Curb Weight (lb. / kg): 7409 / 3360 – ZR2 gas
8113 / 3680 – ZR2 diesel
7793 / 3535 – ZR2 Bison gas
8495 / 3853 – ZR2 Bison diesel
GVWR (lb. / kg): 10850 / 4921 – ZR2 / ZR2 Bison gas
11350 / 5148 – ZR2 / ZR2 Bison diesel
Payload1 (lb. / kg): 3397 / 1541 – ZR2 gas
3193 / 1448 – ZR2 diesel
3013 / 1367 – ZR2 Bison gas
2811 / 1275 – ZR2 Bison diesel


Conventional (lb. / kg): 16000 / 7257 – ZR2 gas
18500 / 8391 – ZR2 diesel
16000 / 7257 – ZR2 Bison gas
18500 / 8391 – ZR2 Bison diesel
Fifth-Wheel/Gooseneck  (lb. / kg): 18070 / 8210 – ZR2 gas
18100 / 8210 – ZR2 diesel
16900 / 7665 – ZR2 Bison gas
15570 / 7062 – ZR2 Bison diesel