Fits the Following Models: 1985-1991 for Chevy for S10 1991 for GMC for Sonoma...Fits the Following Models: 1985-1991 for Chevy for S10 1991 for GMC for Sonoma 1985-1990 for GMC for S15A Performance Fuel Pump Will Fix These Problems : Sputter at high speeds Improves gas mileage Hard starting Loss of power Poor oil resistance...more