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The number one cause of intermitted gauge failure, acompanied by a no start is the ignition switch. The switch is a known issue with the second generation s/t series vehicles, and of those years 1997 was by far the worst. From my experience troubleshooting them, nearly 90% of 1997 Blazers, Bravadas, Jimmys, S10s, and Sonomas have needed an ignition switch replacement for various reasons. The switch can cause issues with anything routed through it, another one of the more common problems that can be caused by the switch is erractic/intermitted transmission shift problems. I will attach a link to the replacement procedure. Look for "Ignition Switch Replacement" in the links to the right.

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โˆ™ 2006-08-26 10:35:26
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Q: Why gages don't work on your 1997 Chevy blazer what could be the problem you changed the battery and alternator but still doesn't start?
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