Is this an automatic transmission?
Probably the shift linkage in that model.
The on switch for a 1998 Buick Riviera is the ignition switch, located on the steering column. To start the vehicle, insert the key into the ignition, turn it to the "On" position, and then to "Start" to engage the engine. Additionally, ensure that the gear shift is in the "Park" or "Neutral" position for the car to start.
Check the transmsission fluid level May be time for a rebuild
In a 2000 Buick Regal, the power steering pump is typically located on the front of the engine, towards the driver's side. It is usually mounted to the engine block and connected to the steering gear via a hose. You can identify it by looking for a round, cylindrical component with a reservoir attached, which holds the power steering fluid.
Worn trans or diff parts. If it gets worse, have it looked at.
I have the same problem right now and im trying to figure it out. if you have any suggestions i would be glad to take them...but i think its the Neutral safety switch but im not 2 sure yet.
It is important to know the location of the different car parts. The Reverse Gear Light Switch is located on top of the gearbox in most cars.
it sounds like your neutral safety switch
on the gear shifter
It is located on the gear shift handle.
On the transmission!!
on the side of the gear box