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| Model | 2021 GMC Sierra 3500HD | 2006 GMC Sierra 3500 |
|---|---|---|
| Body Styles | Truck | Truck |
| MSRP | $37,400 - $66,900 | $22,605 - $38,340 |
| Invoice | $35,380 - $62,618 | $20,684 - $35,081 |
| Gas Mileage | ||
| Specs | 2021 GMC Sierra 3500HD Specs | 2006 GMC Sierra 3500 Specs |
| Transmission | A | A, M |
| Drivetrain | 4WD, RWD | 4WD, RWD |
| Engine Type | 8 Cylinder | 8 Cylinder |
| Fuel Type | Gasoline | Gasoline |
| Interior Features | 2021 GMC Sierra 3500HD Interior Features | 2006 GMC Sierra 3500 Interior Features |
| Warranty | 2021 GMC Sierra 3500HD Warranty | 2006 GMC Sierra 3500 Warranty |
| Safety Ratings | 2021 GMC Sierra 3500HD Safety Ratings | 2006 GMC Sierra 3500 Safety Ratings |