Originally Posted by Linctex
I didn't think GM used 13/16"-16 threaded filters any more.
Fram Ultra XG9837 is all you will ever, ever need
I doubt that. I uninstalled my Fram Ultra after 2K, due to real bad cold startup noise. I'm even blaming that filter for restrictions that affected my standing idle when cold. My 3.5 stuttered at cold idle and stopped stuttering right after taking that Ultra off. The Ultra performance woes is why I went to the K&N ...... then all my cold start clatter and engine idle stumbles immediately stopped.
So use an Ultra on that GM Colorado 3.7, if you want. Hopefully it works better for you - than me. There are a number of GM engines that don't like the Fram Ultra.