is it overdrive not working or is it the o/d light not working?
Its a bit confusing - the light indicates O/D OFF.
normal is Light OUT = O/D ON
The o/d button puts 12v thru to select o/d off, the 2 wire cable from the gs stick sometimes breaks where it hinges, which means cant select o/d off.
If you aren't into towing you generally dont need o/d off so ignore it.
If you aren.t going into o/d (with warm engine) it may be the solenoid, or the temp sensor.
enri
June 2016
Hi, did you ever figure out what the problem is? Having same problem with mine. No overdrive