 
			| 2008 GMC Sierra 2500HD Specifications | |
|---|---|
| 2008 GMC Sierra 2500HD Sub Models | |
| Crew Cab | 0.8% | 
| Crew Cab 4x4 | 2.4% | 
| Crew Cab 4x4 Chassis | 0.8% | 
| Regular Cab | 0.8% | 
| Regular Cab 4x4 | 3.2% | 
| SLE Crew Cab | 2.4% | 
| SLE Crew Cab 4x4 | 12.1% | 
| SLE Extended Cab | 1.6% | 
| SLE Extended Cab 4x4 | 17.7% | 
| SLE Regular Cab 4x4 | 1.6% | 
| SLE Z71 Crew Cab 4x4 | 5.6% | 
| SLT Crew Cab | 0.8% | 
| SLT Crew Cab 4x4 | 27.4% | 
| SLT Extended Cab 4x4 | 7.3% | 
| SLT Z71 Crew Cab 4x4 | 15.3% | 
| 2008 GMC Sierra 2500HD Engines | |
| 6.0 Liter OHV 16V VVT V8 | 44.4% | 
| 6.6 Liter DOHC 32-Valve Duramax Turbo Diesel V8 | 55.6% | 
| 2008 GMC Sierra 2500HD Transmissions | |
| 6 Speed Allison Automatic | 50.8% | 
| 6 Speed Automatic | 49.2% | 
| 2008 GMC Sierra 2500HD Colors | |
| Dark Crimson Red Metallic | 9.7% | 
| Deep Blue Metallic | 1.6% | 
| Fire Red | 11.3% | 
| Medium Brown Metallic | 2.4% | 
| Onyx Black | 13.7% | 
| Silver Birch Metallic | 10.5% | 
| Sonoma Red Metallic | 1.6% | 
| Stealth Gray Metallic | 8.1% | 
| Steel Gray Metallic | 8.9% | 
| Summit White | 32.3% | 
| 2008 GMC Sierra 2500HD Interiors | |
| Dark Titanium | 13.7% | 
| Dark Titanium/Light Titanium | 23.4% | 
| Ebony | 49.2% | 
| Ebony/Light Cashmere | 3.2% | 
| Very Dark Cashmere/Light Cashmere | 10.5% |