For 1987-1989 GMC R3500 Back Up Light Bulb API 99139XZWM 1988 Back Up Light

For 1989 Chevrolet R3500 Back Up Light Bulb API 59886HJMB Back Up Light

For 1987 GMC R3500 License Light Bulb API 83835BGZD

API ProTune Back Up Light Bulb fits GMC R3500 1987-1989 51CJNR

API 73DD34P Back Up Light Bulb Fits 1989 Chevy R3500

API ProTune Back Up Light Bulb fits GMC R2500 1987-1989 66GNQG

For 1988-1991 GMC R3500 License Light Bulb API 46885RQXH 1989 1990

API ProTune Back Up Light Bulb fits Chevy R3500 1989 78RWHX