SIERRA 2500HD POWERTRAIN & CHASSIS
Regular Cab, Long Box
Extended Cab Standard Box
Extended Cab, Long Box
Crew Cab, Standard Box
Crew Cab, Long Box
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| Vortec 6.0L VVT V8 2WD | Vortec 6.0L VVT V8 4WD | Duramax 6.6L Turbo Diesel V8 2WD | Duramax 6.6L Turbo Diesel V8 4WD | Vortec 6.0L CNG/GAS V8 2WD | Vortec 6.0L CNG/GAS V8 4WD | |
| Powertrain | ||||||
| Horsepower @ RPM (gas) | 360 @ 5400 | 360 @ 5400 | 397 @ 3000 | 397 @ 3000 | 360 @ 5400 | 360 @ 5400 |
| Horsepower @ RPM (CNG) | N/A | N/A | N/A | N/A | 301 @ 5000 | 301 @ 5000 |
| Torque @ RPM (gas) | 380 @ 4200 | 380 @ 4200 | 765 @ 1600 | 765 @ 1600 | 380 @ 4200 | 380 @ 4200 |
| Torque @ RPM (CNG) | N/A | N/A | N/A | N/A | 333 @ 4200 | 333 @ 4200 |
| Fuel Type | Gas | Gas | Diesel | Diesel | Gas / CNG | Gas / CNG |
| 6-speed Automatic Transmission | Standard | Standard | N/A | N/A | Standard | Standard |
| 6-speed Allison Automatic Transmission | N/A | N/A | Standard | Standard | N/A | N/A |
| 3.73 Rear axle ratio | Standard | Standard | Standard | Standard | Standard | Standard |
| 4.10 Rear axle ratio | Available | Available | N/A | N/A | Available | Available |
| 4-wheel antilock 4-wheel disc | Standard | Standard | Standard | Standard | Standard | Standard |
| Fuel Economy | ||||||
| City (MPG) | Not Rated | Not Rated | Not Rated | Not Rated | Not Rated | Not Rated |
| Highway (MPG) | Not Rated | Not Rated | Not Rated | Not Rated | Not Rated | Not Rated |
| Fuel Tank Capacity (gas / gal.) | 36 | 36 | 36 | 36 | 36 | 36 |
| Fuel Tank Capacity (CNG / GGE) | N/A | N/A | N/A | N/A | 17 | 17 |
| Steering & Suspension | ||||||
| StabiliTrak | Standard | Standard | Standard | Standard | Standard | Standard |
| Front Suspension | Independent, Torsion Bar | Independent, Torsion Bar | Independent, Torsion Bar | Independent, Torsion Bar | Independent, Torsion Bar | Independent, Torsion Bar |
| Rear Suspension | Multi-Stage, Multi-Leaf | Multi-Stage, Multi-Leaf | Multi-Stage, Multi-Leaf | Multi-Stage, Multi-Leaf | Multi-Stage, Multi-Leaf | Multi-Stage, Multi-Leaf |
| Z85 HD Suspension Package | Standard | Standard | Standard | Standard | Standard | Standard |
| Z71 Suspension Package | Available | Available | Available | Available | Available | Available |
| Turning Diameter (ft.) | 47.9 | 47.9 | 47.9 | 47.9 | 47.9 | 47.9 |
| WT | ||||||
| Transfer Case, manual | N/A | Standard | N/A | Standard | N/A | Standard |
| Differential, Locking rear | Available | Available | Available | Available | Available | Available |
| Z82 HD Trailering Equipment | Available | Available | Available | Available | Available | Available |
| SLE | ||||||
| Transfer Case, automatic | N/A | Standard | N/A | Standard | N/A | Standard |
| Differential, Locking rear | Available | Available | Available | Available | Available | Available |
| Z82 HD Trailering Equipment | Available | Available | Available | Available | Available | Available |
| SLT | ||||||
| Transfer Case, automatic | N/A | Standard | N/A | Standard | N/A | Standard |
| Differential, Locking rear | Standard | Standard | Standard | Standard | Standard | Standard |
| Z82 HD Trailering Equipment | Standard | Standard | Standard | Standard | Standard | Standard |