the problem that i have with the car is when i tried to switch from rear wheel drive to all wheel drive, it felt like the front wheels were heavy when making turns. it got so heavy that broke the right side front axle. What can be wrong? thank you.
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Re: 2003 gmc envoy, 4x4 problem
Sounds like the wheel speed senser is not working properly when you are in all wheel drive the computer uses the brakes to keep the all wheels rolling at the same speed for good traction if one speed senser is reading that right side front wheel was going faster than the others it would activated that brake via the antilock brake system
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I have heard that the electric 4x4 push buttons in some Envoys get sticky and don't function right. Maybe disassemble and clean these after checking fuses? I have tons of ideas, but they're not always good. Good luck.
Have your right front Constant Velocity (c.v ) Driveshaft check out. Noise goes away on 2 wheel drive is there is no torq on the shaft like there is on 4 wheel drive. Bad c.v.shaft. Hope this was very helpful.
I also have a 2002 Envoy. Shifting to and from 4wh and 4wa can be done on the fly but shifting to 4wL has to be done stoped and while in neutral. Try that. Otherwise I'm afraid its a new computer for you. Its located under the left rear seat and you need a loan for one.
If your luck it's going to be a $15.00 vacuum switch on the transfer case that takes about 15 min to replace, if it's the electronic solenoid to the transfer case then it's going to be cost a little more and take a little longer. If your try switching from 4WD to 2WD and hear the solenoid working by hearing the cluck's when it engages and disengage then it's going to be the vacuum switch on top of the transfer case on the drivers side. Auto Zone Sell's them for $15.00 and they will have the step by step instructions to replacing the switch. They will also have the transfer case solenoid too, if you don't hear the solenoid. Check the fuses, the fuse may have gone bad. Good luck and hope this helps.