Question about 2002 Chevrolet TrailBlazer

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2002Chevy trailblazer engine cuts off when heater & ac is on

I got the battery changed in my 2002 chevy trailblazer. The idle started to drop and as soon as I turn on the heater or AC the engine cut off. Being doing it now for about week.

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  • Anonymous Mar 17, 2014

    AC AND HEATER NOT BLOWING AIR

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Remove the airintake boot and clean throttle butterfly with a rag and carb cleaner

Posted on Dec 03, 2008

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1 Answer

2004 chevy trailblazer idles up and down when heater is turned on


Not just the heater, but the defroster only. Turning the AC on will do the same thing. You need to clean your throttle body with the battery disconnected to fix this problem.

Oct 01, 2014 | 2004 Chevrolet TrailBlazer

1 Answer

ENGINE IDLE / ENGINE CUTS OFF


Its a sensor that increases the idle under load so it could be a sensor on the power steering rack or a sensor on the autobox when in drive with foot on brake ,its a sensor for sure but what and where i have no idea

Jan 29, 2014 | 2008 Chevrolet Trailblazer

1 Answer

Why does the idle drop when running ac or heater on 2006 trailblazer


your a/c compressor is puttin load on engine and a/c runs with heat also to dry air. have system ck for low 134 or problem a/c compressor .

Aug 05, 2012 | 2006 Chevrolet Trailblazer

1 Answer

My 2002 Trailblazer idles rough with the AC or defrost on when stopped. It rides fine while the car is moving. I changed my battery a couple of months ago and then the problem started. Thanks for your help


I would suggest having the Alternator checked for the proper amp output. Although it may be making enough power to keep the battery charged, it may not be making enough to power the vehicle and still be the reason the engine performs rough at low RPM's under accessory load.

Oct 29, 2010 | 2002 Chevrolet TrailBlazer

2 Answers

What causes the truck to stall when cut the ac on


it could be the iac(idle air control) not adjusting for the extra load on the engine,

May 17, 2010 | 2002 Chevrolet TrailBlazer

1 Answer

I have a 2002 Chevy Trailblazer. Just replaced


If you unhooked battery it will need to relearn its idle position, should help if you clean throttle blade edge and body of carbon so proper amount of idle air can enter engine.

Feb 28, 2010 | 2002 Chevrolet TrailBlazer

1 Answer

Chugging at idle


check oil level might be too full or air cleaner box not fitted correctly or hose from air cleaner to engine not sealed correctly.

May 03, 2009 | 2002 Chevrolet TrailBlazer

1 Answer

Chevy Trailblazer 2003 ran the battery down now wont idle


try changing the air filter ,i had a problem ,at ilde in drive my trailblazer would stall, changed the air filter now it's not stalling and got my power back ,there is a secondary air pump that i have to change ,
not sure were it is ? still not running perfect but it's running better .and my service light is on too.
i got it put on scope ,it's the pump .
not sure if this helps ,but i'm start to run in to problems too,i have a 2004 trailblazer.
i like to do fix things myself ,i hope i can.it's the cost if you know what i mean.

Dec 17, 2008 | 2004 Chevrolet TrailBlazer

1 Answer

2002 Chevy Trailblazer idle down cut off when heater or AC is on


most of the time computer just needs to relearn itself. should straighten itself out after a drive.if not try cleaning the throttle plate

Dec 03, 2008 | 2002 Chevrolet TrailBlazer

1 Answer

2002 trailblazer


first you should try cleaning the throttle body and let the computer relearn its idle by unhooking the battery again and restarting

Aug 29, 2008 | 2002 Chevrolet TrailBlazer

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