[SOLVED] Trailblazer stalls at idle when defrost or A/C turns on - Page 2 - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 Vortec 4.2L I-6 Engine and Drivetrain > OEM Issues

OEM Issues Original Equipment Repairs and/or Problems

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  #11  
Old 03-26-2011, 04:49 PM
jdinjersey jdinjersey is offline
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2004 GMC Envoy SLE
Cranberry Red Metallic 4.2L I6 4X4
Join Date: Feb 2011
Location: Mount Laurel, NJ
Posts: 1
Talking stalls when defrost or A/C turns on

I read many threads related to the stalling and mostly all replies focused on a dirty throttle body. My 04 Envoy started stalling when defrost was turned on a week ago. Pretty dangerous condition when stopped at a light.

Given the how to instructions on this site, it seemed like a job I could handle myself. Figuiring that I have to take most of the breathers and other apparatus off already to get to the throttle body, I thought it was time to do the plugs also.

OK, after 100K miles, and never had the throttle body cleaned with original plugs I found perfectly laid out instructions on this site. Easy to read, great pictures, and good examples of the typical issues that you need to be aware of when taking the apparatus off.

The throttle body was like it had baked on carbon. It was a shocker. Plugs still had the tips. Everything I read on Trailvoy talked about AC/Delco Iridiums, as the other plug manufacturers seemed to have problems a few thousand miles later.

Yep, back plug was a b*tch to get out, and I placed a 1/4" hose to get the plug out after loosing it up first with the wratchet. Same hose used to install the plug without damaging the threads too. Anti-seeze was used as instucted.

The Envoy darn near purs like new and no cut out when defroster is turned on.

I am one happy camper and glad to have found this site. Saved me a bundle also by doing the job myself.
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  #12  
Old 05-26-2011, 08:48 AM
ables's Avatar
ables ables is offline
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2004 Chevy TrailBlazer LS
Sandstone Metallic 4.2L I6 4X4
Join Date: Apr 2011
Location: Anchorage, AK
Posts: 5
mine was doing the same thing and cleaned the tb and she runs like a champ, thanks for all the info
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  #13  
Old 09-03-2011, 07:23 AM
screener screener is offline
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2004 Chevy TrailBlazer LS
Forest Green Metallic Other 2WD
Join Date: Aug 2011
Location: hollywood, florida
Posts: 2
Quote:
Originally Posted by bvad02 View Post
it is most likely just a dirty throttle body. follow this how to and should clear up your problem.
http://forums.trailvoy.com/articles....ticle&artid=91
tried this yesterday and the results were excellent. thanks for the tip, the wife is going to have to find something else to nag about now that the a/c is working again. thanks, glennnnn
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  #14  
Old 09-03-2011, 05:18 PM
thekriegers thekriegers is offline
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2004 Chevy TrailBlazer LT EXT
Light Pewter Metallic 4.2L I6 4X4
Join Date: Jul 2011
Location: Chesapeake, VA
Posts: 1
It WORKS

Thank you for the excellent description and step by step photos. They all worked like a charm and more importantly my Trailblazer does not stall with the ac on and all for only $4.19

Thanks again!!
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  #15  
Old 09-02-2012, 02:34 PM
SSoltesz SSoltesz is offline
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2004 GMC Envoy SLT
Silver 4.2L I6 4X4
Join Date: Aug 2012
Location: St. Clairsville, OH
Posts: 1
Engine stalls when defrost is on

I just wanted to thank this website and the responses that everyone writes. I have trying to figure out why my 2004 GMC Envoy was bogging down and stalling. A mechanic at Meinike said it may be the throttle body and stated that it would 300.00 to replace it. Another mechanic said it was the ac compressor that was bad and that I needed a new one at the cost of 500 to 600 dollars to replace with a new one. Another mechanic had no idea what was going on. After reading these threads, I took it upon myself to get a can of throttle body cleaner on my way to my family reunion and see if I could clean it out. I had the TB taken out, cleaned, and put back in within an hour. Completely fixed the problem! Thanks a million (or at least 300). I will definitely check this site out before taking it to a mechanic.
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  #16  
Old 10-10-2012, 06:15 PM
Voytrail Voytrail is offline
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2002 Chevy TrailBlazer LTZ
Summit White 4.2L I6 4X4
Join Date: Dec 2008
Location: Montreal
Posts: 12
faulty exhaust cam shaft solenoid

I have a 2002 TB LTZ in which for the past six months was dropping RPM and stalling once a day-- from a cold start. After a quick search on the Internet I did the followings:
1- Cleaned the Throttle
2- Had the throttle body under vacuum test over night
3- Changed the gas filter
4- Changed the air intake sensor

Guess what , I did all of the above to no avail.
For the past two weeks, the RPM drops and stalls were occurring every five minutes at all times. I was freaking out and fuming. After taking it to a garage the guy visually found the culprit. It was the exhaust cam shaft solenoid, which was leaking oil. I hope you learn from my experience.
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  #17  
Old 02-17-2013, 05:18 PM
soric23 soric23 is offline
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2004 Chevy TrailBlazer LS
white 4.2L I6 4X4
Join Date: Dec 2012
Location: kenosha
Posts: 7
I just had this problem,,, NOTICE HAD!!

This site is awesome thanks for all the info you guys provide, I was able to remove,clean and reinstall the throttle body in about 45 mins...
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  #18  
Old 02-17-2013, 08:11 PM
04ChevyTbLs's Avatar
04ChevyTbLs 04ChevyTbLs is offline
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2004 Chevy TrailBlazer LS
Gold 4.2L I6 2WD
Join Date: Nov 2012
Location: Virginia
Posts: 39
Had the same issue awhile back during august 2012. Cleaned out the carb/build up inside the throttle body. Found a video on youtube on how to clean the throttle body! Save me money on DIY! So far no problem and driving strong 8,000+ miles with no issue!
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  #19  
Old 03-30-2013, 09:39 PM
cjmartinusn79 cjmartinusn79 is offline
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2004 Chevy TrailBlazer LS EXT
Black 4.2L I6 4X4
Join Date: Mar 2013
Location: Seattle washington
Posts: 1
Had the Same issue after disconnecting the battery cleaned the gunk out of the throttle body and is running awesome. Thanks this forum is the best.
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  #20  
Old 01-13-2014, 04:31 PM
txbear71 txbear71 is offline
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2003 Chevy TrailBlazer LS
Dark Green Metallic 4.2L I6 2WD
Join Date: May 2012
Location: Arlington, TX
Posts: 2
I also had the same problem with the engine dying while at idle with the air conditioning on. It was also right after I replaced my battery. After reading the posts on this site, cleaned the throttle body and it works great now.
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