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  1. J

    Service 4wd Message

    So the service 4wd message popped up last night and so I hooked up the scan tool and this is what I could pull off does this help with anything? I cant imagine i need to replace the encoder motor again this would be the 3rd or 4th hell i don't remember now.
  2. J

    Service 4wd Message

  3. J

    Service 4wd Message

  4. J

    Service 4wd Message

  5. J

    Service 4wd Message

  6. J

    Service 4wd Message

  7. J

    Service 4wd Message

  8. J

    Service 4wd Message

  9. J

    Service 4wd Message

    Ok found a buddy who has a Snap-On scan tool. No current codes in the TCCM but under History C0327 and C0379 come up. 327 with a few quick checks seems to be encoder motor? I am guessing since this is the 3rd one that has been put on this truck that is not issue so maybe a wire or harness that...
  10. J

    Service 4wd Message

    Thank you
  11. J

    Service 4wd Message

    Does anyone have a good schematic or pictures that shows where each ground is that could have an impact on the 4wd system?
  12. J

    Service 4wd Message

    Yeah at least for mine I have Replaced the Switches which originally were bad based on the ohm meter readings. I then replaced the Encoder motor with a off brand, next I removed the main ground wire on the frame rail and cleaned all connections and painted over once installed. I then took to...
  13. J

    Service 4wd Message

    Well that is a very scary thought. I did not have many reoccurrences over the summer months how ever Tuesday night as I am leaving the bowling alley I start my Tahoe up and the truck is in 4-Low which normally I am able to shift to N and press the 2wd button and it will clunk and shift back...
  14. J

    Service 4wd Message

    I guess I owe another update on this. I have not been back to Dealer as it never has a problem during dealer hours so I can take it there while the code is actively displayed. @Eric Pylant Your problem sounds identical to mine sorry I cant help yet. I did watch a youtube video from a user I...
  15. J

    Any tips for better mpg

    I replaced my factory exhaust with Cat back 3" Flow Master 40 series cause that is the sound I like and I have averaged a +.8-1.0 mpg improvement as long as I keep my foot out of the gas other than that it is really the only improvement I have noticed. that gets me to right around 16.0 mpg on...
  16. J

    Service 4wd Message

    Update so far. Since my visit to the Dealership I have not had a single Service 4wd message. WTF. Did they clear the codes maybe and it is going to work for 2-3 months again? I am so irritated with this issue.
  17. J

    Service 4wd Message

    Ok thank you for sharing. When I give up on the dealer I will look for this. I know when I changed the encoder motor the shaft/gear was pretty clean and not oily like in your picture. When i took the old one off I looked for this issue before replacing and did not notice a build up on the...
  18. J

    Service 4wd Message

    Update: Error Code was C0327. I am heading back to the dealership as the problem has returned. Sporadic Service 4wd issues and Stability Control Disabled. So apparent paying the Chevy Dealership was no better than working on it my self. Really sad to pay $900.00 to have a pro fix and it is...
  19. J

    Service 4wd Message

    So update: The repair has been working well until the other day. When I started up my truck in the morning the service 4wd message popped up and stability control disabled as well. Also the seat heater was on. I turned it off and with in a few seconds the seat heater came back on. I drove to...
  20. J

    Service 4wd Message

    2006 Chevy Tahoe 189k 3rd transmission. I am unable to find my previous post about this so just wanted to post an update. I was having the Service 4wd message and also stability control disabled sporadically. I used information on here to test the switch and indeed the 4Lo button had a bad...
  21. J

    Service 4wd issue

    Yes it has the Auto 4wd button. I have never used it before and drive in 2Hi normally. Seems to happen more often after I have used 4Hi or 4Lo then the next time or two when I drive it the Service 4wd message will pop up. Ohmed the switch to confirm it was bad before I replaced it. I have not...
  22. J

    Service 4wd issue

    I am having a similar issue. 2006 Tahoe. Replaced the Button Panel after testing bad and then replaced the Control Module and also pulled and cleaned the ground wires. 4wd does work now and lights are illuminated as they were before the issues began. Now sporadically it will throw the Service...

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