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Could be the Purge Control Valve.
The low pressure port on the 99 Grand am is on the passenger side. It is right against the firewall.
How do you replace evpansion valve on 99 gs 300
Were is the egr valve on a 99 Mazda progege 1.8
if you have a 2.2,most 99's dont have a egr valve, changed to a different to a different emission system in 99
First off, where did you get the 99 grand am strut bar?
passenger side valve cover
how do install a blow valve on passa 1.8t 99
The PCV valve on a 99 GMC Yukon is found in the left valve cover. It allows trapped gases inside the engine to be recirculated and reused.
on the motor
Some 99 Grand Prix vehicles will shift hard when it is warm. Not all of these vehicles will do this.
On the 3.5 engine, the valve is at the right back of the intake. On the 2.7 the valve is on the left front of the intake.