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Chevrolet TrailBlazer, SUV
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#448 of 665 Electrical Problems - several different ones
Jan 03, 2008 (5:56 pm)
Does this sound like a BCM problem?
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2002 Chevy Trailblazer 6 cyl Four Wheel Drive Automatic 144000 miles
We've recently had some strange things happening...
Interior lights - sometimes they fade and go out as they should, other times they stay on after leaving the car. After a couple of dead batteries, we've been using the override (interior lights always off) button.
The master panel on the driver's door.. always works for the driver's window and lock, but has occasional failures in regards to operating passenger windows and locks.
Feedback on locking or unlocking with the remote - used to blink the lights on unlock, blink on single lock command, and blow the horn with a second lock command. Now the results are inconsistent... sometimes nothing, sometimes multiple horn blows, sometimes just the lights blinking.
And finally, the autolock/unlock seems to have a mind of it's own. Works correctly 90% of the time, but occassionally you will hear it cycle the locks multiple times on either locking or unlocking. It also has at least a few times failed to lock when it normally would as well as cycled the locks while we were traveling at 50+ mph....
The battery is good. Voltage in the system is normal.
Are all these items controled by a single module? If so is this something that can be replaced easily. Any clues that you can offer will be greatly appreciated.
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What does a BCM control?
Other than various symptoms, is there a definitive test (i.e. stored codes) that tell you if you have a bad one?
#449 of 665 2003 trailblazer
Jan 05, 2008 (1:48 pm)
2003 trailblazer my rpm will not work what could be wrong. Also the ding sound that it makes when you open the door and the keys are in the ignition does not ding very loud anymore. when to the button on the radio turn the sound to loud but it keeps going back down. need some help
#450 of 665 2006 Chevy Trailblazer headlight problem
Jan 07, 2008 (11:54 pm)
A weird thing happened to me today and I am hoping someone will be able to help me out. I went to start up my truck tonight and the headlights will not turn on. My parking lights and high beams will work but not the headlights. I dont think it is a fuse because both the driver and passenger are out. Any suggestions??
#451 of 665 Re: 2006 Chevy Trailblazer headlight problem [mccone]
Jan 08, 2008 (12:51 pm)
Did the headlamp switch by some chance get moved to the parking lights only position? If so then the auto lamps won't work. If it's like my 02 then the left position is auto, the center is parking only, the right is the headlamp override.
Jan 09, 2008 (12:53 am)
The same thing happend to me two days ago. Everylight in the car worked high beams, tail lights, back ups, turn signals, marker lights, interior, fine the four headlight fuses were fine also. So i thought what could be wrong. I broke out the sercuit tester and tested fuses 6 and 3 which your book will show you on page 5-94 as your low beam fuses. But good old General Motors cant make life easy. The dumb asses left the fuses in the trucks for the power adjustable pedals which i don't have. Well luck have it it is fuse number 53 and it was the only fuse that tested bad. I pulled it saw it was blown. I didnt think this would make a difference, but god said let there be light. Check it out it worked for me.
#453 of 665 Couple of Issues on my 06 TB
Jan 09, 2008 (7:37 pm)
I have 2006 LT TB with the 5.3 V-8, not the EXT. I bought the car back in Aug 2006 and everything has been great...I already have 43,000 mi on it. A couple of things:
1. When looking under the hood around the battery, there is an on/off switch...I have never seen this before and was wondering if others had this. My vehicle does have an aftermarket anti-theft device, but I never activate it...it came with the car...do you think it could be the aftermarket device? If so, I wonder if I could turn it off. I bought the car new and the dealership had already installed this on the vehicle.
2. Sometimes, if the vehicle has been sitting overnight or a couple of days, when I crank it up the clock reads 12:00 like the battery was disconnected. All of my pre-set radio channels works fine and are still in memory, but the clock must be rest. Anyone else have this happen? The battery appears strong and is putting out 13-14 volts
3. When I put the vehicle in park, sometimes (and this is going to sound crazy), the speedometer jumps from 0-40 mph and immediately back down...it only does this once when it happens, and it occurs about twice a month.
4. Sometimes when I enter the vehicle, the CD charger is making noise like it thinks there is a CD, when I do not have one in. What the heck? I don't even have the key in the ignition and the CD is "shifting" like it is looking for a CD or trying to eject something.
Thanks for any help. Much appreciated!
#454 of 665 side marker lamp replacement
Jan 13, 2008 (7:59 am)
What is the easiest way to get to the right side marker lamp on a 2004 Trailblazer to replace it.
#455 of 665 2002 trailblazer
Jan 14, 2008 (5:28 am)
having problem with switch selector,sometimes nothing out of dash vents,then when i turn switch to another mode,say floor vent,i get a steady click noise inside dash,could this be the actuator module,blower settings work fine. any help would be appreciated.thanks woody
#456 of 665 Re: 2002 trailblazer [jerrcrib]
Jan 14, 2008 (7:26 am)
There was a TSB out for the "mode door actuator" which would make the kind of noise you describe. The only repair was to replace the actuator. I had it done a long time ago but it never really effected the operation of the vents for me, but it may be worse in your case. For me it was only occasional and only a few clicks.
#457 of 665 Re: 2002 trailblazer [burdawg]
Jan 15, 2008 (7:42 am)
thanks for the info. I changed the control module seems to have worked,just a small click every now and then vents workin ok for now.i will keep an eye on actuato thaks wwody