2003 Chevrolet Avalanche engine stalling

AMBERDAN89

MEMBER
2003 CHEVROLET AVALANCHE
5.3L
V8
4WD
AUTOMATIC
126,000 MILES

We left the radio on while working on vehicle for about 2 hours, and the battery died. So we jumped it off but it started stalling while driving, so we assumed it just didn't have enough charge. Let it slow charge over night. Next morning, it started but would still stall while driving so we had battery checked and it was a bad battery, replaced it with new one, but now it is idling extremely low and will stall as soon as your footis off the peddle. What can we do to fix this? Thanks!

6 Replies

JACOBANDNICKOLAS

MECHANIC
108,171 POSTS

Often times, if the battery goes completely dead, the computer / sensors have to go through a relearn process. How many miles have you put on it since this happened? Also, has the check engine light come on?

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Monday, September 22nd, 2014 AT 5:38 PM

AMBERDAN89

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4 POSTS

We have only had this vehicle for a couple of days, and after the battery died and we charged it up, we only drove it far enough to take to an AutoZone to check the battery so maybe 20 miles total. There has been no light come on at all.

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Monday, September 22nd, 2014 AT 6:06 PM

JACOBANDNICKOLAS

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108,171 POSTS

It could take a combination of highway and in town driving to relearn. However, the engine idle is controlled by the idle air control valve (IAC). The IAC is located on the throttle body. You could check to see if it is getting power and working to see if that is the issue. Also, make sure that no vacuum hoses were disconnected when the vehicle was being repaired.

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Monday, September 22nd, 2014 AT 7:40 PM

AMBERDAN89

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4 POSTS

So it's safe to drive it even with it stalling while going down the road? This is going to help fix the problem of it cutting off instead of making it worse?

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Monday, September 22nd, 2014 AT 7:47 PM

JACOBANDNICKOLAS

MECHANIC
108,171 POSTS

Is it stalling at idle or while you are traveling? If it is at idle only, just be aware of the issue and see if it relearns within about 50 miles. Be careful and aware of what is happening. If it is shutting down while you are driving and not just at an idle, there is a different problem.