Hi,I asked the same question for my 3.8 liters Pontiac Transport 1994, and was told at the concessionnary garage that there is no PCV valve to replace on my engine....that answer from the garage manager and parts dept. people.Pacman
on a 1998 Pontiac gan am ,they do not have a pcv valve.
Sorry I am not sure how to describe this, but this is a diagram of a Bonneville and its in the exact same location,
There is a great write-up with pics on how to change the PCV valve at: http://macgp.clubgp.com/howto/pcv/pcv.html Hope this helps. G
located about 12 inches right of oil fill cap.attached to front valve cover.
The PCV valve on a 2002 Pontiac Bonneville is located on the back of the in take manifold, however to get to the PCV valve you will need to remove the valve cover.
Try changing the pcv valve. Also check for blockage on the tube going to it.
The PCV valve is located on the back side valve cover. It should be a plug in type and easy to change.
The PCV is non-serviceable. It cannot be replaced.
Pontiac don't carry pcv valves
Pull straight up on the PCV valve to remove it from the valve cover, then pull off the hose from the PCV valve, install the new one by doing the opposite of removal.
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The pcv valne is located is located right near the alternator in the 1993 Bonneville.