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Discussion Starter · #1 ·
Hey just heard from a local mechanic if I want to see a major difference add a chip to my 85 GMC sierra classic. he even said it might up the fuel economy anyone have one? Know where I could get one? goods/bads?
 

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an 85 has a feedback carb,I would save your money-the chip can only manipulate timing and add fuel at part throttle,it will ping on reg pump gas and youll nned 92 octane minimum,on newer gm's Hypertech makes the power programmer-its worth the money,but I would not buy one in your case

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John D
 
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