1997 GMC P3500 with A/C; Position: Front;. 1998 GMC P3500 with A/C; Position: Front;. 1999 GMC P3500 with A/C; Position: Front;. Part Type: HVAC Heater Core. Ensure that this part fits your vehicle by entering your vehicle's Year, Make, Model, Trim, and Engine in the Compatibility Table.
