2003 GMC Envoy "4wd" Questions

noise in the transfer case Hi. Hope I can help you, If you have the 4WD drive light on in the dash along with the noise, then there is a service bulletin that points to a bearing. See this copied from

2004 envoy 4 wd quit working I had TONS of issues with my 2001 Jimmy 4wd. A few things to check; the 4wd actuator switch, the vacuum switch, hub assembly, and the electronic 4wd dash switch. Could be ...

when i put my car on 4wd hi when turning it makes noise This is normal if you are driving on dry pavement. Your 4wd should only be used on loose gravel or snow. Google " 4wd torque bind"

4wd service came on and won't go off 4wd service light came on and won't go off I Had this same problem a while ago. the 4WD setup in the cars computer is set to send out this service light after so ...

2002 envoy 4wd problem. clicking sound comes and 2002 envoy 4wd problem. clicking sound comes and goes - seems like its coming from the front. Can't shift out of 2wd. The "N" indicator light next the ...

My ABS light and Service 4WD light both came on at the same time. None of my 4WD will engage now. The light just blinks. I've been told a sensor in one of my tires could be out. But I don't understand

05 envoy 4wd not engaging remove transfer case switch & front differential switch and they appear to be working the best I can tell, 4wd switch & lights on dash work properly, just not engaging front ...

2002 envoy code co550 you need to replace the tccm and get it programmed. 2-04-21-006E: Inoperative 4WD/AWD Lamps, Inoperative 4WD/AWD System, DTC C0550 Set No Communication with TCCM (Reprogram ...

...correctly, the only other possibility is the front disconnect mechanism. If this part of the 4WD system is not engaging then the Transfer Case Control Module (TCCM) will not allow the system

When the vehicle is cold, the 4WD indicator light will come on at start up and stay on until the vehicle warms up. This results in not being able to put it into 4WD if parked in 2WD or not being able ...