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any advise appreciated
Lots of luck
Now it does go into 4wd low, but still having problems with the power going to front shaft. Again up on stands, all wheels spin great. But i hold brakes and only rear spin. Could this be an actuator problem on transfer case? Bad fluid? Vaccum line? Or is the case just bad?
All 4wd selections including auto 4wd have same symptoms. But drive shaft does jerk like it wants to spin, just not enough power. 2WD works great, and no funny sounds, smells, or clanking in any selection.
Mine did the same , so I was a fix it my self, when I did see I could not fix it ,I got person with electronics to check it out, there was 25 codes on it and a bad selector switch.
New thermostat, radiator & temp sending unit but still shows overheating.
We installed a manual gauge, this one shows the temp is within operating range & that thermostat is opening & closing appropriately.
Any suggestions on what to check on the dash gauge? The ground wire is attached correctly but maybe we're missing something else.
Thanks in advance for any assistance!
I researched thousands of postings on the Web about this problem, and I have fixed it (for now). In the process, I drew out a wiring diagram of the Transfer Case Shift/Servo Motor, a Pinout, resistance checks with an Ohmmeter that can be done without removing the Transfer Case Shift/Servo Motor and that information is posted here.
Hope this will help you diagnose this common problem.
I would recommend taking the vehicle to your local authorized GM dealer of choice. If you need assistance locating a dealer, please let me know.
GM Customer Service
I have a 1999 140k miles have replaced the encoder motor once & and the front actuator 2 times, the dash switch 2 times, rebuilt the transfer case once.
link shows encoder motors
http://motors.shop.ebay.com/__?_from=R40&_trksid=p3841.m39.l1313&_nkw=encoder%20- motor&_sacat=&rvr_id=193394075195&MT_ID=335&crlp=1263599956_9887&tt_encode=raw&g- eo_id=491&keyword=encoder+motor&adgroup_id=773792716
I have a floor shifter and this makes it sound like its only on push button shift models?
I took it to the dealer and they said I needed to replace the encoder motor. I bought it from them and replaced it. Easy to do, I might add.
3 or 4 days later, the same message reappeared. I went back to dealer and they said it could be the switches instead. I bought the switche and replaced them (in about 5 min).
Few more days, message is back. I called the dealer and now they want $90 more to "reset" the code. They say it's not really broke, but I just need to pay them to reset the code and all will be fine.
My question is, if the parts have been replaced, do I really need to have the code reset or should it reset on it's own. I hate to pay them more money if it doesn't fix the problem.
I'm in for $90 for reading the code the first time, $400 for the encoder, $90 for another read, $100 for the switch. that's almost $700 and the truck is still doing the exact same thing.
Any other options for what this cause is. I checked the battery ground and it isn't corroded at all.
Your help is greatly appreciated...
I've heard that this is common on chevy's. Has anyone run into this problem and if so what was your fix? I've already spent $98 on the switch from the dealer, so I'm commited now.
The 4wd does not work whatsoever. I'm sure that I'm now looking at replacing the encoder motor which is between $185-$200 depending upon where you get it.
Fortunately I have studded tires so getting around town and such is fine, but I own a rental that is located in the mountains and with the snow that we've been getting I might get in there but I probably won't get out without the 4wd.
I understand you are working on fixing this yourself. Unfortunately, I cannot assist with diagnosing your vehicle. You could have the dealer assist you in diagnosing the vehicle. Please keep me updated on your situation.
GM Customer Service
last year i installed a new engine and before it was installed the 4x4 didnt work and as soon as i got it back with the new engine it worked, but has recently gone out again? really strange.
My best recommendation is to take it to the dealer. Even if only to have it diagnosed. I apologize for you frustrations. Please keep me updated on your concerns. Have a great 4th of July weekend!
GM Customer Service
Thanks in advance....Wayne
I put a call in to GM...they said a dealer had to check it out, so I took it to my GM authorized service department. They checked it out and said there was nothing wrong with it.... that all 4wd's "hop" and clunk when turning on dry pavement and that it's just the way they are built. I find it hard to believe that it's normal for it to do that since it sounds as if something would tear apart in short order if you had to use the 4wd on pavement. But.....they are the experts....not me, so I guess I have to believe them. Thanks again for the advice.