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This is a problem I have and am still dealing with on my 2000 ZR2 blazer. First the cheapest is to check the vacuum line runs to acuator under the battery tray. Next it could be your buttons not working(I doubt it but has happend). Then its getting expensive could be silonoid or shifter on the transfer case. The n if not that the most expensive and notorious with our blazer is the ECM = Electronic Control Module which is the computer for the transfer case (dealership only part $475). Hope I helped!
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∙ 15y ago
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The Chevy Blazer with a 4.3l engine has a firing order of 1-6-5-4-3-2. The number one cylinder is on the driver side closest to the front of the Blazer.
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on a 91 blazer s10 4wd
