No...................
Its located in the center of the vehicle but you will need to remove the side panels if equipped and then remove the lower heater core cover and the heater hoses.............
inside dashboard on passenger side
On a 1989 Chevy Celebrity the heater hose leaves the water pump via a hose barb then runs along the top of the passenger side frame rail and then into the heater core. The heater core is in the firewall below the blower fan on the passenger side of the car. The return hose leaves the heater core and runs along the firewall then to the water outlet below the thermostat.
YES. Good possibility if it is leaking at the passenger side
Under the dashboard on the drivers side, in the fuse block. Just pull it and replace it.
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.
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".
The 1989 Chevy Celebrity V6 is rated at 130 hp.
In a 1989 Chevy G20 van, the heater actuator is typically located under the dashboard on the passenger side. It is mounted to the heater box, which is situated near the center of the vehicle's interior. To access it, you may need to remove the lower dash panel and possibly the glove compartment for better visibility and access.
The 1989 Chevy Cavalier dashboard speakers measure 4.5 inches in diameter. There will be a speaker on each side of the dashboard.
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.