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1999 GMC Sierra

Tiny
COASTER55
  • MEMBER
  • 1999 GMC SIERRA
  • V8
  • 4WD
  • AUTOMATIC
  • 115,000 MILES
On thanksgiving my truck would turn over and over till the battery was almost dead. It was cold and wet out so I just put the battery charger on it and waited till the next day! When I went out It started right up. I drove it around to do a few errands and it started right up every time. Then next day when I went to start it, no go. I checked the fuel pump and it is working! I replaced the fuel filter and still nothing. Is the computer working? What is my next step? I know that a motor nedds fuel, spark, and air! But with the new fuel injection and computers in the equation it is confusing. If you can help me in any way it would be appreciated. Thank You
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Sunday, November 29th, 2009 AT 5:29 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
When was the last tune up? The reason I ask is because you mentioned it was damp. Also, when it doesn't start, have you checked for spark to the plugs and actual fuel pump pressure? Here are the how to's for checking both:

https://www.2carpros.com/how_to/how_to_test_an_ignition_system.htm

https://www.2carpros.com/how_to/how_to_check_fuel_pressure.htm

Let me know what you find.

Joe
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Sunday, November 29th, 2009 AT 11:48 PM

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