I recently changed my rotors with stoptech drilled and slotted rotors along with Porterfield R4-S pads that i bed in properly.
dont waste your money on oem!
Here's the product landing page for our
Chevy Colorado:
https://www.zeckhausen.com/catalog/index.php?cPath=102_1698_3935_8049
StopTech doesn't make a drilled rotor for this application. However, they do make drilled & slotted rotors for it. They're not on the shelf, so they have to be machined to order. That process takes StopTech about 3-4 weeks and then they would ship directly to you from their City of Industry facility in California.
Not many pad choices for the Colorado. If this is a work truck, I would want something with good bite and torque and high fade resistance. That would be the Porterfield R4-S pads. No brainer. If it's a show truck and not used for towing, and brake dust is a major consideration, then you want Posi Quiet Ceramic pads.
Hope this helps!