Starts but doesnt turn over

Asked by Notacarguru1984 Sep 18, 2017 at 02:46 PM about the 1999 GMC Sierra 1500 SLE 4WD Extended Cab SB

Question type: Maintenance & Repair

I have a 99 sierra with a 5.3 motor (4x4 auto trans.)
that was given to me last owner said he was
driving and it just died on him. I have put a fuel
pump in it, it starts with fuep in cylinder 1 also new
ecm and camshaft positioning sensor. There is
fuel coming out of every injector it cranks bit wont
start.

5 Answers

Notacarguru1984 answered 7 years ago

So i just swapped out 7 of the sparkplugs (one was tougher) seems im making progress it turns over and runs for a few seconds then dies.

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