Regular ethylene glycol antifreeze............
mine does not have one
I believe they are located on the starter.
Curb weight, 3,309 lbs
The original wheel size is 15"
It uses a distributorless coil pack and a crankshaft trigger sensor.
I just purchased a 1990 Buick Riviera with 45,000 on it for my daughter. However, I did have a brief period that you discribed with the car stalling out. I don't know if this will help, but I just read at another site, that it may have a faulty idle air control.
Leaking from? Hose Water pump Intake gasket
1990 lincoln town car
If both sides (right and left) don't blink on and off, the blinker "can" may be the culprit.
inside , right by the drivers right calf, it's hidden behind a pull out panel
Kind of bolts- they use both metric, and SAE so you will need a full toolset for both.
The engine control module (ECM) on a 1990 Buick Riviera is typically located under the dashboard on the driver's side, near the steering column. It may be mounted to the firewall or behind a panel for protection. To access it, you may need to remove some trim pieces or panels. Always consult the vehicle's service manual for precise instructions.