Same as the one pictured here. Under Map sensor on passenger side of upper intake.
http://autorepair.about.com/library/illustrations/bl795lib.htm
On the steering wheel
check for bent or burnt valve check for bent or burnt valve
On a 1998 Oldsmobile Cutlass, the bleeder valve is typically located on the brake caliper or brake cylinder, depending on whether you're bleeding the front or rear brakes. For the front brakes, it's usually found on the top of the caliper. For the rear brakes, check the wheel cylinder, which is often located on the rear axle. Make sure to consult your vehicle's repair manual for the exact location and any specific procedures.
Put it in the low side. The small round valve. Make sure the ac is on.
You don't have a heater control valve for this truck.......
its behind the power steering pump assembly pretty much right between the upper plenum and the back side of the pump. it sits straight out off of the fuel rail hard to get to but you can get a tester on it
On a 1998 Oldsmobile, the EGR (Exhaust Gas Recirculation) valve is typically located on the intake manifold, near the throttle body. It may be mounted vertically or horizontally, depending on the specific engine model. To access it, you might need to remove some components for easier visibility and reach. Always refer to a repair manual for your specific model for precise location and removal instructions.
It is located inside the evaporator case.
On the valve body inside the transmission.
The fuse panel cover is on the passenger side in a 1998 Oldsmobile intrigue. Same location as vehicles that have it on driver side. Just pull on it and it will pop off.
The "Related Question" below is an extensive discussion on the 1999-2003 temperature control valve / heater control valve. It is likely the information will be similar to the 1997 / 1998 Windstar
Next to the power steering pump