For 1987-1989 GMC R2500 Knock Sensor Replacement AP 77756JVQJ 1988

For 1987-1989 GMC R2500 MAP Sensor Replacement AP 72278TDQT 1988 VIN: C

For 1987-1990 GMC R2500 Suburban Knock Sensor Replacement AP 69462QVPR 1988 1989

For 1987-1991 GMC R2500 Suburban MAP Sensor Replacement AP 46772NSJP 1988 1989

For 1987-1989 GMC P2500 Knock Sensor Replacement AP 39417NNJJ 1988