Does it have a funny smell? it could be leaky heater core
under the back seat passenger side
It's located under the rear passenger seat.
Buick Riviera was created in 1963.
Beneath the lower radiator hose is the petcock or drain. Be careful when loosening as it is made of plastic.
If it's like all the Riviera models from '95 thru '99, it's under the rear seat, passenger side.
By-pass elbow
The battery is located under the rear seat in the passenger compartment.
Under the dash on the passenger side below govebox
buick riviera '92. My dad had one and he loved it.
It is located in the fuse box under the hood on passenger side.
i have a 92 buick riviera that putters and chuggs when i accelarate but idles great
choke idle adjustment on 1988 Buick Riviera