2002 GMC Envoy Engine will not turn over

123,000 MILES • 6 CYL • 4WD • AUTOMATIC
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WERNER
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  • 1 POST
Intermittent non-start (engine does not crank lights do come on) usually follows "security" dashboard light coming on then going off by several days. Does not show error code on dealers scan. Usually starts after 15-20 minutes w/ignition in on position - but not last time. Had to turn key off/on a number of times finally started. Replaced ignition sw helped for a year or so but back to same issue. Certain it has something to do with security system. Dealer no help. Acquaintences with other GM vehicles have same issue.
Jun 22, 2010 at 6:43 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
if you have the diode type system the diode in the key or the lock may have gone bad and not reading all the time like it should.
Jun 24, 2010 at 12:30 PM
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