SLT 4x4 Extended Cab 8 ft. box 157.5 in. WB
2003 GMC Sierra 1500 trims (24)
(Work Truck) 4x2 Extended Cab 6.5 ft. box 143.5 in. WB
| MSRP | $23,600 |
| Engine | 4.3L V-6 |
| MPG | 15 city / 20 hwy |
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(SLT) 4x4 Extended Cab 8 ft. box 157.5 in. WB
| MSRP | $31,752 |
| Engine | 5.3L V-8 |
| MPG | 15 city / 19 hwy |
(Denali) 4x4 Extended Cab 6.5 ft. box 143.5 in. WB
| MSRP | $44,255 |
| Engine | 6.0L V-8 |
| MPG | 12 city / 15 hwy |