Specs - 2006 GMC Sierra 2500HD Technical Specifications
| Brakes | SL | SLE1 | SLE2 | SLT | Work Truck |
|---|
| Brake ABS System | Four-Wheel | Four-Wheel | Four-Wheel | Four-Wheel | Four-Wheel |
| Disc - Front (Yes or ) | Yes | Yes | Yes | Yes | Yes |
| Disc - Rear (Yes or ) | Yes | Yes | Yes | Yes | Yes |
| Front Brake Rotor Diam x Thickness (in) | 12.8 x 1.5 | 12.8 x 1.5 | 12.8 x 1.5 | 12.8 x 1.5 | 12.8 x 1.5 |
| Rear Brake Rotor Diam x Thickness (in) | 13 x 1.1 | 13 x 1.1 | 13 x 1.1 | 13 x 1.1 | 13 x 1.1 |
| Cargo Area Dimensions | SL | SLE1 | SLE2 | SLT | Work Truck |
|---|
| Cargo Box Width @ Wheelhousings (in) | 50.0 | 50.0 | 50.0 | 50.0 | 50.0 |
| Engine | SL | SLE1 | SLE2 | SLT | Work Truck |
|---|
| Displacement | 6.0L/364 | 6.0L/364 | 6.0L/364 | 6.0L/364 | 6.0L/364 |
| Engine Type | Gas V8 | Gas V8 | Gas V8 | Gas V8 | Gas V8 |
| SAE Net Horsepower @ RPM | 300 @ 4400 | 300 @ 4400 | 300 @ 4400 | 300 @ 4400 | 300 @ 4400 |
| SAE Net Torque @ RPM | 360 @ 4000 | 360 @ 4000 | 360 @ 4000 | 360 @ 4000 | 360 @ 4000 |
| Exterior Dimensions | SL | SLE1 | SLE2 | SLT | Work Truck |
|---|
| Height, Overall (in) | 76.2 | 76.2 | 76.2 | 76.2 | 76.2 |
| Wheelbase (in) | 133.0 | 133.0 | 143.5 | 143.5 | 133.0 |
| Width, Max w/o mirrors (in) | 79.7 | 79.7 | 79.7 | 79.7 | 79.7 |
| Fuel Tank | SL | SLE1 | SLE2 | SLT | Work Truck |
|---|
| Fuel Tank Capacity, Approx (gal) | 34 | 34 | 26 | 26 | 34 |
| Steering | SL | SLE1 | SLE2 | SLT | Work Truck |
|---|
| Steering Type | Pwr Recirculating Ball | Pwr Recirculating Ball | Pwr Recirculating Ball | Pwr Recirculating Ball | Pwr Recirculating Ball |
| Turning Diameter - Curb to Curb (ft) | 43.8 | 43.8 | 46.8 | 46.8 | 43.8 |
| Tires | SL | SLE1 | SLE2 | SLT | Work Truck |
|---|
| Front Tire Size | LT245/75R16 | LT245/75R16 | LT245/75R16 | LT245/75R16 | LT245/75R16 |
| Rear Tire Size | LT245/75R16 | LT245/75R16 | LT245/75R16 | LT245/75R16 | LT245/75R16 |
| Transmission | SL | SLE1 | SLE2 | SLT | Work Truck |
|---|
| Drivetrain | Rear Wheel Drive | Rear Wheel Drive | Rear Wheel Drive | Rear Wheel Drive | Rear Wheel Drive |
| Trans Description Cont. | Manual w/OD | Manual w/OD | HD Automatic w/OD | HD Automatic w/OD | Manual w/OD |
| Trans Type | 5 | 5 | 4 | 4 | 5 |
| Vehicle | SL | SLE1 | SLE2 | SLT | Work Truck |
|---|
| Front Head Room (in) | 41.0 | 41.0 | 41.0 | 41.0 | 41.0 |
| Front Leg Room (in) | 41.3 | 41.3 | 41.3 | 41.3 | 41.3 |
| Front Shoulder Room (in) | 65.2 | 65.2 | 65.2 | 65.2 | 65.2 |
| Passenger Capacity | 3 | 3 | 5 | 5 | 3 |
| Second Head Room (in) | 38.4 | 38.4 | 38.4 | 38.4 | 38.4 |
| Second Leg Room (in) | 33.7 | 33.7 | 33.7 | 33.7 | 33.7 |
| Second Shoulder Room (in) | 66.3 | 66.3 | 66.3 | 66.3 | 66.3 |