When you remove the Power Steering cap, there is a measuring mark on the underside of the cap.
The flasher on a 1994 Pontiac Trans Sport is typically located under the dashboard on the driver's side. It is often mounted near the steering column or fuse box. Check your owner's manual or consult a repair guide for the exact location.
Power steering fluid maybe low check your power steering pump.
check the fluid in the power steering pump
Check the wheel bearings to start
Check under the dashboard, to the left of the steering column.
Link with picture of where steering fluid goes: http://www.fixya.com/cars/t1612500-power_steering_fluid
Same place you check it.
check down under the steering wheel at the bottom of the dash
Power steering or possibly brake. Check your reservoirs.
It could be a power steering belt that is wore or stretched. If no luck with the power steering belt check the pulley.
It is possible for the check engine light to come on in a Pontiac Transport when using ethanol gasoline because it burns hotter than other gasoline. The check engine light might also come on if the oxygen sensor is bad.
check the ignition modulator under the distributor cap