Last post on Jul 09, 2012 at 10:00 AM
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Chevrolet TrailBlazer, SUV
#91 of 120 2003 Trailblazer Idle
Jun 15, 2010 (1:12 pm)
Replaced a bad alternator last week. Now it starts and charges fine but I have a new problem. The idle seems OK without out the A/C on, but goes crazy when I turn it on. It dies when I come to stops and sometimes speeds up when I take my foot off the gas going over 35mph. I've been driving it around without A/C on and have only noticed a couple of minor surges when parking. Does anyone know which fuses I should check or any other causes of this issue?
#92 of 120 Re: 2003 Trailblazer Idle [jagtx]
Jun 16, 2010 (7:07 pm)
First I have to say that I'm so glad I found this site. I have an 04 TB, 114,000 miles. Have had no problems until recently. I went out one morning and tried to start it. Nothing....no clicking no nothing. Thought it was the starter, but after a phone call to the mechanic and following some directions over the phone it was determined that it wasn't the starter, but the battery. Replaced the battery and now I have another problem all together. I can start the TB, drives fine, but when I turn the fan on for heat or cool air (not ac) then the RPM's drop to below half and it stalls out. Then if I'm driving and coming to a stop it does the same thing with the fan on. If I turn the fan off the RPM's drop but it doesn't stall. If I try the ac, it stalls. Can anyone please give me the answer on how to fix this problem?!! My mechanic can't figure it out and I need help. I'm a single mom with 2 kids and 2 jobs that I can't afford to lose!
Thanks in advance.
#93 of 120 Re: KEEPS STALLING [trailblazergal]
Jun 21, 2010 (8:10 pm)
Hay, Did you ever get your TB fix. I would like to know.
Jun 22, 2010 (12:13 am)
It sounds like either a bad computer or your mechanic needs to go and look inside your idle air control circuit. When ever you activate your defrost or ac settings your computer is suppose to raise and lower your idle and keep it from dieing.
#95 of 120 Re: Beautiful Cranberry 2000 Trail Blazer 4 Dr. [burdawg]
Jun 24, 2010 (9:03 pm)
I also have 2000 chevy TRAIL BLAZER yes they made the trail blazer in 2000 and it will die going down the road but start right back up. I've only had this TB for two weeks and it's been at three shops and they all just scratch their head and say"Well I don't know". I had two fuel pumps put in it and no change. Everything else seems to work great ecept the radio now shows err instead of the time or station,have no idea if that meens anything. It still plays fine. I'm going to get it tommrow. So any ideas?
#96 of 120 Re: Beautiful Cranberry 2000 Trail Blazer 4 Dr. [62cowman]
Jun 24, 2010 (9:32 pm)
In 2000 it was an S10 Blazer with the "trailblazer" option.
#97 of 120 Re: 2003 Trailblazer Idle [frustrated37]
Jun 29, 2010 (2:18 pm)
I just joined looking for other TB user problems. I have the same A/C on car dies problem too. Just started when the battery would not charge. Bought new battery last weekend. Now idles great until i turn on the fan switch. Even if the A/c is off, the fan switch makes it vary in idle and usually stall, especially at stops. Definitely electric but what?
Does the dealer have any real answers?
#98 of 120 Re: KEEPS STALLING [desertstorm01]
Jul 12, 2010 (8:25 pm)
What happens when the battery is replaced or cables disconnected, the on board computer loses its memory. When you start it up after new battery is installed, either the computer needs to be reprogrammed by a dealer or you can let it teach itself by driving it, starting and stopping often, turning the engine off, and restarting, this happened to me and it took me several days of driving to get the car back to normal. The quick fix is to take it to a dealer and have the computer reprogrammed with the correct parameters.
When you have the battery replaced, it is a good idea to have a second battery hooked up before disconnecting the bad battery. This way the computer will not lose its memory. Most reliable auto shops when replacing a battery will use this method when replacing the battery.
This happened to me and it took me several days of driving, starting, stopping before the computer reprogrammed itself. My trailblazer is now running fine. It is aggravating, to have to do it this way, but is cheaper than having the computer reprogrammed.
#99 of 120 04 Trailblazer Trouble
Jul 21, 2010 (7:40 pm)
I have a 2004 Trailblazer LS that is giving me a headache! About 6 months ago it started hesitating to start on cold starts(by hesitate I mean I would have to turn the key and hold it for about 5-10 secs before it would start) and now it is doing it ALL the time. I had a tune up done already(new spark plugs and fuel filter), I had the battery replaced and the fuel regulator replaced. My mechanic is stumped too, we are debating whether to continue with replacing the starter or fuel pump next. Any input would be great thanks!!
#100 of 120 Re: 04 Trailblazer Trouble [carmax21]
Jul 21, 2010 (8:50 pm)
I suggest you take to someone who will actually troubleshoot and find the problem, instead of throwing parts at it like it sounds has been done. There's all kind of problems that can cause the symptoms you describe, from simple to complex.
When you do get it started, how does it run? Smooth idle? Normal power?