I have a 02 Envoy SLT. The other day I was driving and stopped at stop sign. I went to press the gas, and the truck would not move in ANY gear. When I put it in park, I heard a loud ratcheting noise coming from underneath the truck. The transmission fluid was fine. Then I tried to put it in 4hi, low and behold the truck regained all of its gears. When I put it back in 2hi, it worked fine again. I replaced the 4x4 selector switch. Well... this issue happened again. So I hooked up my Autel MD802 scanner on it to read the automatic transfer case to read the encoder motor position on the scanner itself. I noticed that sometimes when I shift the 4x4 selector on 4wd, auto, and 4wd. The transfer case encoder motor will still show neutral on the scanner, even though the 4wd selector switch is either on 2hi, auto, or 4wd. And the truck will not move when my scanner shows that the transfer case encoder motor position is on neutral.. This does not always happen. Sometimes it will go into 2hi & 4wd. Also, the neutral light does not illuminate on the 4wd selector switch.
SO could the transfer case encoder motor be the culprit here? And causing the transfer case to be stuck into the neutral position at times? Or could it be the TCCM? I'm just looking to see if anyone else has had this problem before. Also, I am shifting from 2hi to 4hi or lo when my gear shifter is placed into neutral.
Thanks!
SO could the transfer case encoder motor be the culprit here? And causing the transfer case to be stuck into the neutral position at times? Or could it be the TCCM? I'm just looking to see if anyone else has had this problem before. Also, I am shifting from 2hi to 4hi or lo when my gear shifter is placed into neutral.
Thanks!