For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 2004 🢒 GMC K Sierra - 4WD (CNG) 🢒 Engine 🢒 Engine Controls - 6.0L 🢒 DTC P0171 or P0174

DTC P0171 or P0174 for GMC Truck GMC K Sierra - 4WD (CNG) 2004