Trying to replace gas cap on my 2011 Malibu with a 2.4l and I'm finding 3 different types and was wondering if anyone knew which one was the good fit for mine.
One is a Vacuum Only Cap and the other is a Pressure Vacuum Cap and a OE Equivalent Vacuum Only Cap. I don't want to grab the wrong one.

Thanks in advance,
Chris...

 

get a cap from the chevy dealer; then you know its correct.
are you trying to fix a evap system fault?

 

Yes, the car has a P0442 EVAP code so I was going to try to replace cap again. The first cap I replaced doesnt seem like it fits quite right. I was just wondering if the 3 choices I found on the auto parts place mattered which one I picked. I'll call my local Chevy dealer and see if they have one.

 

the code sets when a small leak is detected in the system. The pcm test the system by closing the vent solenoid and monitoring the fuel tank pressure sensor. If a pressure change is not detected the po442 sets.

clear the dtc, install the new cap. if the code resets have a shop pressure up and seal the system with a smoke machine. If the flow meter of the machine zeros out...there is no leak...the fault is possibly the fuel tank pressure sensor.

 

I'm gonna call the dealer and see if I can order a new part fit for the car. The cap I bought was a carquest cap from an auto parts place. I also replace the purge solenoid and the canister purge valve with no luck. Hopefully the correct cap for the car fixes it.