The petcock is at the bottom of the radiator on the drivers side of the car.
The drain is near the bottom of the radiator on the drivers side of the car.
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.
The oxygen sensor on a 1989 Chevy Celebrity is located in the rear exhaust manifold on top about the center.
The radiator drain plug on a 1989 Chevy C1500 Silverado is on the bottom of the radiator.
The 1989 Chevy Celebrity V6 is rated at 130 hp.
Looking in my factory service manual for a 1989 Chevy Celebrity I found no reference to an accessory relay.
The spark plug gap for your 1989 Chevy Celebrity 2.8 V6 is .045".
There is no fuse on the alternator.
on the side of the transmission
take the front grill off. the petcock is on the side of the radiator, passenger side.
* - 8/1/09 Open petcock on the passenger side of the radiator. This is not easy to do, but it is the enviromently cleanest way to do it. You will need to disconnect everything holding it into place, including the transmission cooler lines. you will need to slightly lift the radiator to reach the petcock. Good luck. - *