There is no separate switch for the overdrive, simply put the gear selector in the overdrive position. It looks like a D inside a square. Not all Chevy Celebrities have the overdrive feature, it was an extra cost option.
I have not seen a standard Chevy Celebrity with a toggle switch under the dash. I would suspect that is something a previous owner installed.
The petcock on a 1989 Chevy Celebrity is at the bottom of the radiator on the drivers side.
The oxygen sensor on a 1989 Chevy Celebrity is located in the rear exhaust manifold on top about the center.
The 1989 Chevy Celebrity V6 is rated at 130 hp.
The spark plug gap for your 1989 Chevy Celebrity 2.8 V6 is .045".
Looking in my factory service manual for a 1989 Chevy Celebrity I found no reference to an accessory relay.
There is no fuse on the alternator.
on the side of the transmission
The thermostat on a 1989 Chevy Celebrity is located under the water outlet fitting. Follow the upper radiator hose, it will end at the water outlet.
No Chevy Celebrity ever had a 4.0L engine
how do you install new ignition switch on 1989 chevy G10 van?
All Chevy Celebrities have rack and pinion steering.