It's always best to start checking for wiring problems by inspecting the harness in areas where it's most likely to be damaged by moving engine components, rotating parts or road objects striking the underside of the vehicle. I now have 75K miles on this Yukon. The undercarriage is cleaner, corrosion-wise, than any of the Tahoes we looked at. Please notify me of anything do to the transfer case. The consumer took the vehicle to the dealer for inspection, and the mechanic determined that this was a design flaw from the manufacturer. Yes, you would expect a 309 if the encoder was bad.
The objects appeared far away than normal. This was the only issue I have had over the last 60k miles. Or, do I just unplug the wiring harness and check there? Removed the bolts holding it in place. The mechanic informed the consumer that the mirror could be replaced, but the driver had to pay for it. I began by indexing the front drive shaft. There were no codes, however he was able to make the 2wd, 4hi, and 4low lights come on in the switch module so I assume that means the switch is fine? I would also take the time to read the owners manual as well. There are bulletins on the auto 4x4 actuator and on a transfer case motor sensor.
I just went and checked my records and it turns out I went three prior times, twice to one place and once to another. Any help would be greatly appreciated? So, Onstar still reports only a code of C0306. My mechanic read the codes and said it was the Encoder Motor, I don't remember what the code he gave me was. I think I'll go out and get another Onstar diagnostic right now. Problem solved for a while. However, I knew the fuse also powered the transfer case control module. That's why I was a little relieved to see an electrical fault.
I don't think any reasonable person would prevent me from changing the fluid in that event. Or: change it and risk his denial? It can determine this because each switch has a different resistor in series with the circuit. It appeared that the auto 4x4 switch was changing. I didn't get the seal as it looks like, with care, it could be reused. On dash, message would read 'service stability'. What if the dealer refuses to take the car back? So, in my case, it won't cost the dealership anything to fix this.
This last time I went to yet a third place and when they couldn't give me an answer that's when I just told them to replace the encoder. It's held on by 2 bolts, can't take more than 10 - 15 minutes to change myself. It has even been towed into their shop on one occasion. This has occurred on several occasions. Guess I'll call the dealer again and see what he'll do, or won't do.
I've informed the dealer service dept to hold as the truck is there right now. No lights on your selector switch, etc? I'm getting ready in a couple day to replace my encoder ring and this write is perfect. Thanks for the info j cat. It was a fleet owned vehicle. I was told yesterday that this problem is known to gm engineers as the four wheel automatically sensing a need to shift , and that there was no known fix. I believe it is 100- 120 miles. When this sensor starts to burn out, it sends incorrect signals to the computer, which then starts to move the motor around to find the correct position and that leads to the random transfer case behavior.
That helped me to narrow it down to the transfer case. Ok so here's my non-mechanic dumb dumb question. So, not an immediate emergency. I simply pressed the buttons while watching the scan data. The consumer did some research and discovered it was a well known issue with the transfer case oil pump retaining method, causing the pump to move around in the housing, eventually wearing a hole in the rear transfer case housing. I'm trying to save as much money as I can.
I am having an issue lining up the motor with the transfer case in my 2005 Chevy Suburban. I have some mechanical ability so I have started checking things out. I kept it in Auto for a few months and then started to notice that it would randomly engage the 4-wheel drive while on the pavement, yikes! The other day the lights came on again and never went off. Any thoughts on where I could get one specific for the 2006? I have been having the following problems with my 2005 tahoe intermittantly for over a year Stability System Disabled Service 4 Wheel Drive Traction Control Light on Sometimes when first starting and for a while after engine would not exceed 1800 Rpms after highway driving this would start to function normal. Numerous companies have made a mod kit to address the issue which gm has not.
Other times i will have the same message but the buttons will not be lit. Of course, the clunking sound when shifting in and out is quite pronounced. No error lights came on. Here's the iceing on the cake, I disassembled the encoder, cleaned the contacts and re-aligned the brushes and viola! This is extremely dangerous when pulling into heavy traffic. It's easy to fall into the habit of replacing common problematic components without verifying that they actually are defective. This dealer is a small, privately owned business. Using a voltmeter, I determined 0 voltage was present on terminal C, circuit 241, brown wire.
If not repaired soon, car could engage in 4x4, and a turn on pavement could damage gears and other parts. Just hit 100k in my truck a couple of weeks ago and I'm really happy about having this fixed. If you did properly troubleshoot your work at the dealership , I would suspect that you would be fired. I'm 62 and don't get up off the floor real well anymore. They said they have the ability to read multiple codes, and that is the only code showing.