Thread: 1990 Suburban wont start!!
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Old 08-16-2022, 03:23 PM   #14
Corts60
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Join Date: Jun 2008
Location: Holland, MI
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Re: 1990 Suburban wont start!!
Just throwing it out there that the oil pressure switch is a normally open switch. So unplugging it does nothing to help your troubleshooting.
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