My 2002 envoy is stuck on hi 4wd it don't go back to 2wd and there is no lights working on the switch

SOURCE: 4WD shift problems

Some one told me to unhook the batery for half an hour then hook it back up and try it. Well it worked,no more shif problems.

SOURCE: Stuck in Lo Range 4WD. Suggestions?

Try key in run position(without starting it) and try to shift it into 4wd high with the shift lever in neutral.

SOURCE: I have a 2003 chevy blazer LS, 2-door 4wd w/

try putting in nuetral and then shift into high gear . if still does not work sounds like the 4x4 acctuator is bad

SOURCE: 2002 envoy 4wd problem. clicking sound comes and

Clicking sound- Possible electronic fan clutch failing. This is a typical problem with the 4.2L I6. When you hear the clicking, open the hood and listen if its coming from the fan clutch on front of the engine. this could also cause abnormal engine and transmission cooling. As for the "N" light and 4wd issue, have scanned at the dealer....Hopefully this helps

SOURCE: wont shift from 2WD to 4WD

check switch , fuse and relay if good check cable hoses and wiring at transfer are not damaged or disconnected -check actuator for proper movement actuator has a tendency to stick lube actuator rod if necessary