Top 20 2011 Chevrolet Avalanche Questions & Answers

This has to be a wiring issue in the seat heater harness. Do a continuity test for all the connections for the seat pad.

Probably a broken wire at the control end.

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The flasher itself is located in the fuse box. No relay.

sounds like one of the led bulbs were bad to begin with or had a bad connection. Try powering them on individually to make sure they are good then reinstalling.

Had a similar problem, found the tailgate was not closed all the way. Close the tailgate real hard and then lock with the key fob.

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

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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)

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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

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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