EGR valve on 1998 Chevrolet Prizm

I need to clean are replace the EGR valve in my daughter's prizm...where is it located?

Asked by for the 1998 Chevrolet Prizm
I can't find good pictures or repair procedures for you. I am almost certain the EGR valve on the 1.8L is at the back of the engine toward the firewall, next to the rubber boot coming from the air filter housing you have the throttle housing and just further looking left (looking in from the radiator) is the EGR. There is usually a vacuum modulator and or an electrical solenoid to transfer vacuum.