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| 2006 GMC Sierra 1500 Extended Cab | 2005 GMC Sierra 1500 Extended Cab | |
| Price Range | ||
| Engine(s) | 4.3l V6, 4.8l V8, 5.3l V8 | 4.3l V6, 4.8l V8, 5.3l V8 |
| Transmission(s) | A4 | A4 |
| Driven Wheels | 4WD, RWD | 4WD, RWD |
| Length / Width / Height | 230.2 / 78.5 / 71.2 | 230.2 / 78.5 / 71.2 |
| Curb Weight (lbs.) | 4617 - 5008 | 4617 - 5008 |