Top 20 2008 Chevrolet Avalanche LTZ Questions & Answers

Sounds like a soft ware problem. Or an overheated/dieing chip. You can get on at a junk yard and have it programmed to your truck. Or get an aftermarket with the kit and install it. You do loose programming options with the aftermarket radios.

These were known for having faulty brake light switche that would cause that problem as well as cruise control inop. I would check that first. It operates the shift-lock solenoid which releases the shifter. There were also some problems with the ignition switches, but mostly on the gm cars.

Go to your auto part store or body shop and ask for 3M mirror adhesive.

unhook the batter cable and leave for about five minutes then rehook cable

https://www.modifiedlife.com/2004-chevrolet-avalanche-car-audio-wiring-diagram/

On my 04 Grand caravan,the E G R tube went through a pipe about the size of a quarter to the valve cover.it should have a rubber grommet in it

Some fixya user told me a website reliablestore it is very good.. I used it to repair my shredder it had some spark issue which wasn't easily fixed. you can go there and try

Try, www.youtube.com/watch?v=3RFTS22w6tM

First need to hook up a scanner to see if the emc is talking to the tcm, It may just be a communication problem

Sounds like your "traction control" system is having issues such as a wheel speed sensor. You can have these type things scanned free at your local auto parts store, Auto Zone, Advance Auto Parts etc. etc. They should be able to "steer" you in the right direction. Hope you get the problem at hand resolved, for that is dangerous driving like that. Jesus loves you, John 3:16-17 (KJV)

You found the right place right time buddy.. i know a lot of websites for repairs and manuals that can really help u..

Depending on what you have for diagnostic knowledge and tools. You may want to send it in for diagnostics and repair. I can tell you that your vehicle's BCM (Body Control Module) controls these circuits. If it was a t my shop. I would first look for any fault codes. Then through the scan tool, manually command the doors to lock and unlock. Depending on what I find, take a closer look at the master control switch. This is in the drivers door and opens/closes windows and locks/unlocks doors. I'm forwarding you a couple wiring schematics just in case. I don't want to slow you down. FYI under the hood, inside the power distribution box. There is a relay for the tailgate lock/unlock. Any questions please feel free to write back. Good Luck.

Look here https://www.mahle-aftermarket.com/media/local-media-north-america/pdfs-&-thumbnails/torque3.pdf

you found the right place buddy.. i know a lot of websites for repairs and manuals that can really hel p u.. like reliable-store is pretty good

Battery Disconnect or Replacement Problems

temp control is the board

if talking about evap container --under vehicle buy rear axle and fuel tank --disconnect lines and connections and replace be careful of sparks because of fumes from canister

May be a voltage drop on the feed wires or weak ground point to those passenger side windows .

It should be on side of transmission.