Does someone have a suggestion for a good aftermarket master cylinder cap? I 've checked Rock Auto, Auto Zone, O'Reilly, Amazon and Dorman for a matching part but no one lists. one (Dorman part number 42042 matches lots of Chevy vehicles but it only lists up to 2008 HHR as compatible.) GM wants almost $30 for an OEM cap. Any suggestions would be greatly appreciated.

Edit: I have a 2009 HHR LT 2.2L.

 

Count me as confused.
If Dorman lists one up to the 2008, and you have a 2008 according to your profile( you didn't include that needed info in your post), then wouldn't that part work ?

Fwiw. Maybe just try a wrecking yard.

 

That was my fault on both things: my profile was wrong and I did not mention in my original post that I have a 2009 LT with a 2.2L.

 

I don't know that they are different. Dorman probably bougt the inventory in 2008 and never updated the catalog.

Did you think to check part numbers on an online parts place like gmpartsdirect.com?

 

I found in the Dorman site their part # 42042 fits the 2009.

GM has part #Genuine GM 22688449 Brake Master Cylinder Reservoir Cap and it is listed to fit as follows

This product fits 2603 vehicle variants.
Buick: 15 models, 313 variants between 1987 and 2009.
Cadillac: 13 models, 184 variants between 1987 and 2011.
Chevrolet: 34 models, 928 variants between 1987 and 2015.
GMC: 5 models, 188 variants between 2003 and 2014.
Hummer: 1 models, 10 variants between 2003 and 2008.
Oldsmobile: 15 models, 353 variants between 1987 and 2008.
Pontiac: 17 models, 542 variants between 1987 and 2010.
Saturn: 11 models, 85 variants between 1991 and 2009.