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Registered User
Join Date: Oct 2016
Location: Mesa Az
Posts: 46
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Re: Noob Fixing a 1993 sierra gt, 5.7 engine, 2wd, positive differential
You can replace the buttons. If you want to check the health of the engine hookup a vacuum gauge tester and see what readings you have. Link up some pictures on here so there is a better idea of what you want answered.
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