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2003 GMC Sonoma OCCASIONALY WONT START

Tiny
REBK1964
  • MEMBER
  • 2003 GMC SONOMA
  • 130,000 MILES
SOMETIMES MY TRUCK WONT START. IT JUST TURNS OVER AND ALMOST STARTS. AFTER ABOUT TEN MINUTES OF TRYING IT STARTS. DOES MPT MATTER IF HOT OR COLD. TODAY EVERYTIME I TRIED TO OSTART IT I HAD THE SAME PROBLEM. ONCE STARTED IT RUNS FINE BUT CHECKK ENGINE LIGHT IS ON
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Tuesday, September 3rd, 2013 AT 8:07 PM

1 Reply

Tiny
CARADIODOC
  • MECHANIC
  • 33,870 POSTS
You have the perfect clue to the cause of the problem. The Engine Computer detected a problem, set a diagnostic fault code, and turned the Check Engine light on to tell you. Start by having the code(s) read. Many auto parts stores will do that for you for free. Be aware those codes never say to replace parts or that they're bad. They only indicate the circuit or system that needs further diagnosis.

You didn't say which engine you have. Many GM engines are very intolerant of low fuel pressure. Some will not start or run if the pressure is low by just a few pounds.
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Tuesday, September 3rd, 2013 AT 8:56 PM

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