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1999 GMC Sierra engine won't start when turned over.

Tiny
1999GMC
  • MEMBER
  • 1999 GMC SIERRA
  • V8
  • 4WD
  • AUTOMATIC
  • 250,000 MILES
Hello. Truck was running fine. The when I tried to start the engine it didn't start but head lights worked radio worked. Got a tow home and tired disconnecting the battery. Then tried to start it but it didn't. Finally the neighbour came out and offered to give me a boost. We tried and tried and ect. Looked at the fuse box and chaged some of the fuses. Nothing is working


so if u have any ideas please write back to me thanks
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Monday, November 9th, 2009 AT 7:30 PM

1 Reply

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Welcome to the forum, are you saying it cranks good but won't start, or it won't even crank? If your saying it won't crank, make sure the battery has a full charge and the connections are good, then check the circuits at the starter relay in the fuse box under the hood. If it cranks good but won't start, have a helper crank it, while you check for spark at the plugs. Use a gage and check fuel pressure.
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Monday, November 9th, 2009 AT 9:10 PM

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