Question about 1998 GMC Sierra

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Security light on GMC suburban will not let truck start on humid days until light goes off like half an hour later or so.It cranks over just not run. Maybe something connected to the ignition pump? Is their a sensor to unplug or bypass somehow? please help. Any suggestions?

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  • 299 Answers

Sounds like pass lock sensor in ignition housing has Failded.Try cycling door locks with key fob and make sure you check positive cable on battery for corrosion between cable and battery. may not be able to see till remove battery cable.If there is corrosion clean cable thoroughly and change bolt and battery.

Posted on Jun 20, 2009

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