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iHav to Drive
American Muscle
1992 gmc started showing the service engine soon light?
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<blockquote data-quote="MadJack" data-source="post: 2687068" data-attributes="member: 223109"><p>I suspect the oil pressure and Check Engine light is unrelated.</p><p></p><p>This vehicle was built before 1996 and will have an OBD1 computer. It takes a different GM only code scanner. Most major automotive parts stores can extract the diagnostic codes from the computer for free. However you may have problems finding a store with a code scanner for an old OBD1 computer.</p><p></p><p>The oil pressure gauge. 25 PSI is a little low but not too low. I would not consider this a problem unless the oil pressure got below 15 PSI at idle and below 30 PSI on the highway.</p></blockquote><p></p>
[QUOTE="MadJack, post: 2687068, member: 223109"] I suspect the oil pressure and Check Engine light is unrelated. This vehicle was built before 1996 and will have an OBD1 computer. It takes a different GM only code scanner. Most major automotive parts stores can extract the diagnostic codes from the computer for free. However you may have problems finding a store with a code scanner for an old OBD1 computer. The oil pressure gauge. 25 PSI is a little low but not too low. I would not consider this a problem unless the oil pressure got below 15 PSI at idle and below 30 PSI on the highway. [/QUOTE]
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