I did the same thing on my '98 K1500. If yours is a 4WD, you will be limited in filter choice due to the front driveshaft. I run either the AC PF454 or the aforementioned Wix 57099. I've read that the Wix 51069 may work, but I have a hard time finding it locally, and looks too close to comfort for me.
If you have a 2wd, this is a non-issue.
Here's a pic of the 51069 installed I found online.