1996 GMC K2500 Suburban Engine: 5.7L V8 GAS;. 1996 GMC K2500 Suburban Engine: 7.4L V8 GAS; W/O Air Pump; Position: Serpentine;. 1997 GMC K2500 Suburban Engine: 5.7L V8 GAS;. 1997 GMC K2500 Suburban Engine: 7.4L V8 GAS; W/O Air Pump; Position: Serpentine;.