Can someone provide more detail on how to check these items on a 2003 Bonneville n/a? I am having the gas cap problem and have snaded the filler neck and purchased a new cap. message still on.

"There'* also a purge vent unit you need to clean... I think it'* hooked to one of the lines that goes to the evap canister under the passenger side rear floor board."

"It was the purge canister solenoid causing the problem. The solenoid is mounted on a bracket on top of the engine very close to the firewall"

Does anyone know the details on what the purge unit vent looks like

There'* also a purge vent unit you need to clean... I think it'* hooked to one of the lines that goes to the evap canister under the passenger side rear floor board.

I got this last week too, somehow I didnt put it on correctly (must have been in a rush) I felt stupid plugging in the Tech2 to see a code....something that GM should have just made an icon for somewhere on the instrument cluster.

Its bad enough my Oil Pressure Sensor just went bad and I'm reading 120psi on the I/P, sensor voltage reads almost 5volts, so I know its fried. I dont think it'll do any damage I haven't got any SES lights or odd performance because It'll have to wait a few days.

Does this help any?? I kinda skimmed over this topic so im not sure if its what your asking for.