service 4wd

  1. Tray0625

    07 Yukon C0306 Service 4wd (most fixes tried already)

    C0306 (Motor A/B Circuit) persists for over a year and all the parts and $ thrown at it. Please Help! I have done; - actuator - selector switch - TCCM - TCCM wire harness - Encoder Motor & relearn flash - Checked all external grounds, cleaned - checked all fuses - I do not see broken wires...
  2. cbuckeye20

    Manual vs dealership maintenance schedule

    My 2015 just went past 100k and dealer wants to change everything. Some of this stuff, per the manual, I should have done 10k miles ago but I didn't see any mention of how often power steering fluid should be changed. Also internet search says coolant every 30-35k miles while manual says 150k...
  3. I

    02 z71 4x4 problems continue. New switch, new encoder, same problem.

    Hey sorry for posting so much So I have swapped the switch, no change I swapped in a new encoder motor and cleaned the connectors ( no corrosion just wanted to be thorough) , no change Before the encoder motor and cleaning I had c0308 and c0327 With the new encoder I had c0308 and c0323...
  4. A

    Kicking into 4L with encoder unplugged

    So I'm at a loss right now with my Tahoe. I have a rear main seal leak and it's been leaking into the encoder motor. I cleaned and replaced the encoder ring once I found the issue but since doing so my tahoe kicks into 4L on it's own when starting the vehicle and putting it into drive. I have...
  5. 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...

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