1990 GMC Sierra 1500 Overview

Sierra 1500

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Sierra 1500

Looking for a Used Sierra 1500 in your area?

CarGurus has 64,603 nationwide Sierra 1500 listings starting at $999.

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GMC Sierra 1500 Questions

Tpi My Motor?

Hi I have a 1990 GMC sierra C1500 that I would like to put a tune port injector on. Do you think it is possible and worth doing rather than putting an efi aftermarket carburetor on? Thanks! ~Car

Truck Won't Start Unless Floored And Then Dies Out Is It Flooded?

My truck has been starting good and running pretty good but dies at times and I have to floor it to get it started again. Now it won't start at all. What could my problem be?

Truck Won't Move

Its starts good but it wont go, i need to floor ir in order to move but it move like it is forced but it move very slow like it wont go much

Calif Smog Legal Engine Swap Upgrade

what do you think would be the easiest engine to swap my 1990 gmc sierra k1500 with, concidering its going to have to pass the origanal smog test . thank you - todd stewart

Throttle Body

I'm working on a 1990 gmc 1500 it runs good but when it looses vacuum starts,to run really rough