2002 chevy trailblazer_lt_ext
O.k., lets start with goodmorning.. "SMILE". I've read alot of forums about simular problems with the service light for the 4wd comming on and the selector switch is black, no lights on, I've tryed everything from pulling fuses which sometimes works to unplugging the battery for several hours. The whole system works fine as long as it's above 8 deg. C., from 2 hi all the wat to 4 low, anything below temperature is a no go. The sevice 4wd light comes on and nothing works. If I drive around for awhile with heat on, turn off the engine for 10 to 15 min., restart, the service light is off and eveything works fine. Could this be caused by a failty TCCM that freaks out when it's cold or do you think it could be something different? When I asked GM about a new down load to the TCCM, well it could be " I think he said encoder", the piece that bolts to the side of the transfer case. This part he said is over a "G" note. But they would have to do a scan first, an extra 65.00$.