Timken and SKF are or were the OE supplier for the 800s and 900s but don't know about your K2s. I run Timkens, Made in the USA.
Front hubs are sealed, no bearings to replace. If you need them out back, that's pretty rare and ought to be investigated. AAM was the OE supplier for your 12-bolt rear axle.
When unsure of who the OE supplier was, I stick with GM Original Equipment:
84869190
12479031/RW20-10
Rear wheel bearings need special tools for removal and installation so that one does not damage the ABS tone ring right behind it.
Front hubs are sealed, no bearings to replace. If you need them out back, that's pretty rare and ought to be investigated. AAM was the OE supplier for your 12-bolt rear axle.
When unsure of who the OE supplier was, I stick with GM Original Equipment:
84869190
12479031/RW20-10
Rear wheel bearings need special tools for removal and installation so that one does not damage the ABS tone ring right behind it.