2003 GMC Sierra GMC Sierra stalls

Tiny
ADAM SIERRA
  • MEMBER
  • 2003 GMC SIERRA
  • V8
  • 4WD
  • AUTOMATIC
  • 101,000 MILES
I have a 2003 GMC sierra 4.8L. 4x4 Auto. Yesterday my girlfriend took it to the store and when she came back she left the lights on and ran the battery dead. I jump started it and all was fine. The next morning I started it to go to work and when I took it out of park the idle dropped to about 300 RPM and the came back to about 700 RPM. And on the way to work every time I would stop at a light or stop sign it would do the same thing and it would stumble a little. Then when I left work it stalled when I put it in gear and would stall every time I came to a stop but otherwise it ran fine. I also noticed that it does not matter if I put it in gear or neutral, as soon as I take it out of park the idle drops way low. I don't have a check engine light on or anything either. I've never had any problems with this truck untill after she ran the battery dead. I don't know if the two are related or just a coincedence.
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Monday, November 1st, 2010 AT 9:47 PM

4 Replies

Tiny
JDL
  • EXPERT
If the battery is down, you need to take it off and get it charged. The alternator wasn't made to charge a dead battery. I don't know if issues are related? You may need to check the charging system.

Usually with idle issues, I clean the throttle-body and check the iac.
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Tuesday, November 2nd, 2010 AT 10:11 AM
Tiny
ADAM SIERRA
  • MEMBER
Thanks, I'll give it a shot.
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Tuesday, November 2nd, 2010 AT 5:38 PM
Tiny
ADAM SIERRA
  • MEMBER
I cleaned the T.B. And the I.A.C. And now the truck runs normal again. Thanks!
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Friday, November 5th, 2010 AT 8:27 AM
Tiny
JDL
  • EXPERT
Glad you got it going your way.
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Friday, November 5th, 2010 AT 8:56 AM

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