2003 Chevy Trailblazer Stalling

TOMN

MEMBER
2003 CHEVROLET TRAILBLAZER
6 CYL
2WD
AUTOMATIC
83,000 MILES

Hello, I have a 2003 Chevy Trailblazer 2wd 4.2L.I start the car and turn the heater on, the rpms go real low a few times then vehicle will stall out. It happens with vehicle in park or drive. If I don't use the heater I have no problem at all, it will not stall.I don't know where to begin to look, please provide me with a few pointers thanks for your help in this matter. Thanks, Tom

Friday, December 5th, 2008 AT 9:28 PM

2 Replies

BRIAN 1

MECHANIC
1,030 POSTS

Engine may stall with the air-conditioner on and or while adding additional loads to the engine at idle. An example of an addition load would be turning the steering wheel left or right with the air-conditioning on. This type of stall usually occurs during idle or slow parking lot maneuvers. This concern may not set any diagnostic trouble codes.

Recommendation/Instructions:
Clean the throttle body bore and the throttle valve plate using a clean shop towel with GM top engine cleaner, GM P/N 1052626 (Canadian P/N 993026) or AC-Delco Carburetor Tune-Up Conditioner, P/N X66-P, or an equivalent product.

Post back if this fixes it.

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Friday, December 5th, 2008 AT 9:42 PM

SPEEDYPETEY

MEMBER
1 POST

Mine happens only when its raining or snowing. And the power cycles on the car. This indicates to me that it is a short somewhere. Meaning either wire or other electrical is getting wet. Check the electrical as an option. Connectors and circuit brakers.

If you already resolved it, let me know how. Thanks.

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Saturday, December 20th, 2008 AT 2:05 PM