I have a 1996 Prizm LSI and the OD switch is a small round button on the side of the shift lever. You could have accidentally switched it off and that is why you get the light.
It could be because the bulb is burned out ot he wire is disconnected.
Could be a bad overdrive solenoid switch or relay. No, I don't know where they are on this car.
Overdrive switch is located on the gear shift stick, just below the handle. You could toggle with your right thumb to see if the O/D light comes on when pressed.
Could be the overdrive on/off switch, which is located on the gearshift handle. That's all the help I can give you, best of luck.
If engaging the overdrive and then after a few seconds it starts to flick on the dash board the likely problem will be that the overdrive is no longer working properly. Also, this could indicate a battery being dead.
check the injection , and go for tuning. the tuning might be off
Overdrive relay switch behind the middle air vents..... Manual Transmission: the wires sometimes break if it is the type with the button on the gear/knob/ stick........... if it is a manual transmission.......the switch on the gearbox which tells when 4th gear is engaged can be faulty.....and will not allow the overdrive to engaged.
I just took my 97 in to have the switch fixed. Not only was the switch not the problem but is worst now. The overdrive will not shut off and the ford dealer charged me 800 dollars to break the overdrive. Make sure you have a switch problem. I could not find much information in my manual which is why I took it to the dealer who then shafted me.
I have a 99. how do you turn OD off, with wiper control stick button? Is so, could be a fuse or switch.
If the overdrive light won't go off or it flashes this indicates a transmission problem. It could be a matter of replacing the shift solenoids or an entire rebuild. You might try pulling the codes and see if any of them indicate a transmission problem.
The transmission for the 1996 Chevy 3500 could be jumping from overdrive for several reasons. The transmission could have a vacuum or electrical problem causing it to come out of overdrive. Or, there could be an internal valve problem causing this to happen.
I just read on another site, that the switch is controlled by the engine temp. It will not allow the Z to go into overdrive if the car is not up to temp. Could be the t-stat is stuck open or the engine temp switch is bad. Research engine temperature controls. Just a place to start.