5.3 Liter OHV 16-Valve Vortec V8 Engine on the 2003 GMC Sierra 1500 Regular Cab 4x4
5.3 Liter OHV 16-Valve Vortec V8 Engine on the 2003 GMC Sierra 1500 SLE Extended Cab
5.3 Liter OHV 16-Valve Vortec V8 Engine on the 2003 GMC Sierra 1500 SLE Extended Cab 4x4
5.3 Liter OHV 16-Valve Vortec V8 Engine on the 2003 GMC Sierra 1500 SLE Regular Cab 4x4
5.3 Liter OHV 16-Valve Vortec V8 Engine on the 2003 GMC Sierra 1500 SLT Extended Cab 4x4