Search by number: 1991 GMC Full Size Pickups 5.0L 8 Cyl Starter ProAmp 6416 $103.00 each OPTIONS: 4WD, wo/124 Amp Alt ProAmp 3733 $113.00 each OPTIONS: 4WD, w/124 Amp Alt, Opt ProAmp 3510M $117.00 each OPTIONS: 4WD, w/124 Amp Alt, Std ProAmpN 3510MN $118.00 each OPTIONS: 4WD, w/124 Amp Alt, Std ProAmpN 6416N $130.00 each OPTIONS: 4WD, wo/124 Amp Alt ProAmpN 3733N $181.00 each OPTIONS: 4WD, w/124 Amp Alt, Opt IMI IMI102N $249.00 each OPTIONS: IMI High Torque