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Old 08-06-2015, 12:23 PM   #1
gasmn1620
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Join Date: Oct 2014
Location: panama city, fl
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87 silverado, service engine soon light

What causes this light. Mine comes on intermittently. Comes on after driving for 30 minutes or so then turns off if I floor it, then return to normal engine speed. Doesn't hurt anything it's just annoying.
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Old 08-06-2015, 01:20 PM   #2
Malo83
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Re: 87 silverado, service engine soon light

My 83 will light up during long idles but will go out as soon as you get going
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Old 08-06-2015, 03:44 PM   #3
77 Big 10
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Re: 87 silverado, service engine soon light

With an obd 1 reader you could just fix it, or it is also discribed how to do it without. Here is a how to: http://www.obd-codes.com/faq/read-gm...codes-free.php
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