Did this swap on my truck. Best thing I've done for stopping. I used the ac delco slotted rotors and power stop ceramic pads in the front. Ordered everything for a 2005 with rear drum brakes. That gives you the 13" rotor and get the calipers for the same truck. The rear I have Silverado SS dual piston calipers and ac delco slotted rotors with OEM ceramic pads. Best it's ever stopped.
Huh, this whole time I had no idea that the SS had dual piston rears. Looks like according to Rockauto they are just front calipers in the rear!
FitsRear Left; Silverado 1500 HD; with Phenolic Piston Caliper
OrFront Right; Silverado 1500 Base Model; Rear Disc brakes; with Phenolic Piston Caliper; with Brake Code JC4; GM Brake Codes are on the "Service Parts Identification" sticker.
OrFront Right; Silverado 1500 Base Model; Rear Disc brakes; with Phenolic Piston Caliper; with Brake Code JH1
OrFront Right; Silverado 1500 Base Model; Rear Disc brakes; with Phenolic Piston Caliper; with Brake Code JH2; GM Brake Codes are on the "Service Parts Identification" sticker. (Only 6 Remaining)