Chevrolet Avalanche 2500 Problem Report
Chevrolet Avalanche 2500 Service 4WD Message May be Displayed
The 4WD transfer case encoder motor position sensor or the selector switch may fail causing the service 4WD message to be displayed. Fault code(s) stored in the transfer case control module will be of assistance in determining the exact fault causing the message to be displayed.
Repeated "service 4wd" light comes on. Unable to change transfer position. Dealer replaces sensor - Visitor
My 2002 Avalanche will not switch into 4wd! I bought it new and take great care of it! Is there a recall on this issue? - sylcham67
4WD message came on and will not engage into 4WD> - Visitor
Was raining hard and started up my truck and 4wd service light came on. will not turn off. - Visitor
check 4wd light kept comping on and it would also shift very hard when buttons were pushed - firefighter118
My "4WD NEEDS SERVICING" warning message has been on for about 2 months. I checked/added 4WD fl...
One or more heater & AC (HVAC) air delivery and/or temperature mode door actuator may fail...
The steering wheel position sensor may fail, resulting in the service stability message being d...
The fuel pump may fail causing the engine to stall and not restart.
The CD player may fail due to an internal fault with the radio. Our technicians tell us that i...