1988 to 2000 GMC & Chevrolet pickup truck parts are, for the most part, interchangeable.
1998 - 1989 most Chevy gmc parts are the same,.. lmctrucks.com
Body panels- 1989-2006, 1989-1998 geo/chevy tracker
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Sierra Vista Scenic Byway was created on 1989-07-14.
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In the summer I use 10w-30 in my '89 Sierra in the summer I use 10w-40
4l60 non electric
There is no such thing on a vehicle that early.
1982 - 1994 (early year models).
Years of body parts that should match your 1989 4 door sedan: Front header 1987 through 1990. Hoods from all years. Front fenders 1986 through 1990. Front doors from all years. Rear doors from sedans only. Rear header panel from 1986 through 1989. Trunk lids from all sedans and coupes.
Please resubmit the question with more info.
1989.