Overview
The Baer Brakes 4302136CY is a rear disc brake kit for 1999 to 2019 GM C/K1500 trucks and 2000 to 2020 GM C/K1500 SUVs, sold for Chevrolet, GMC and Cadillac models. It pairs a 1-piece monoblock 6-piston caliper, designated 6S and finished in Comp Yellow, with a 14-inch slotted, drilled and zinc-plated rotor. The kit is intended for vehicles that came from the factory with rear disc brakes and a manual park brake.
This is the Extreme system. The caliper is CNC machined from a US-sourced 2618 aluminum forging and powder coated, with stainless steel pistons, abutments and noise suppression clips. The rotor carries a billet aluminum hat. Brackets and hardware are included, and the factory rear brake hose and park brake components are reused. The 14-inch rotor is designed to fit most wheels 18 inches or larger.
Key features
- 1-piece monoblock 6-piston 6S caliper with staggered pistons to reduce uneven pad wear
- Dual dust, weather and pressure seals
- CNC machined from a 2618 aluminum forging with a powder coated finish
- Stainless steel pistons, abutments and noise suppression clips
- 14-inch 1-piece slotted, drilled and zinc-plated vented rotor with billet aluminum hat
- Uses the FMSI D1247 pad type
- Manufactured in Phoenix, Az
Choosing rear brake upgrades
Rear disc brakes do a larger share of the work when a truck carries a load, tows, or runs down a long grade, so the rear caliper and rotor see real heat and pad wear. Upgrading the rear system is often done alongside the front, so braking balance stays consistent between the two axles. A larger rotor with a fixed multi-piston caliper spreads pressure across the pad more evenly than a stock setup, which can help pads wear consistently.
Before choosing, consider the wheel clearance and the room between the rotor hat and the spokes. Check that the parking brake works properly on the factory components this kit reuses, since the hand brake is a separate function that also depends on the rear hardware. Wheel and tire size, plus any lift or leveling kit, change how much room the caliper has.
- Inspect the rotor surface for scoring and heat cracks at each pad change
- Replace pads as a matched set with the rotor they will run against
- Look for fluid leaks at the hose connection after the first drives
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302136CY |
| UPC | 90127944011 |
| Sold as | Kit |
| Axle | Rear |
| Caliper | 1-piece monoblock, 6-piston, 6S, floating |
| Caliper color | Comp Yellow |
| Caliper body material | 2618 aluminum forging |
| Rotor | 1-piece, vented, slotted, drilled, zinc-plated, billet aluminum hat |
| Rotor outside diameter | 14.0 inch |
| Rotor thickness | 1.15 |
| Brake pad type | FMSI D1247 |
| Template | N228P |
| Minimum wheel diameter | 18.0 inch |
| Lug count | 6 |
| Wheel bolt pattern | 6×5.50 inch |
| Park brake | Not included; factory park brake components are reused |
Vehicle fitment
It fits the 1999 to 2019 Chevrolet Silverado 1500, the 2002 to 2006 Chevrolet Avalanche 1500, the 2007 to 2013 Chevrolet Avalanche, the 2000 to 2014 Chevrolet Suburban 1500, the 2015 to 2020 Chevrolet Suburban, the 2000 to 2020 Chevrolet Tahoe, the 1999 to 2019 GMC Sierra 1500, the 2000 to 2020 GMC Yukon, the 2015 to 2020 GMC Yukon XL, the 2000 to 2014 GMC Yukon XL 1500, the 2002 to 2020 Cadillac Escalade, the 2003 to 2020 Cadillac Escalade ESV and the 2002 to 2013 Cadillac Escalade EXT.
The list does not cover the Chevrolet Colorado, the GMC Canyon or 2500 and 3500 heavy-duty models, and no listed entry runs past the 2020 model year. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Brackets and hardware are included, so the caliper and rotor mount with the supplied parts. Because the factory rear hose and park brake parts are reused, the existing lines and parking brake must be in good working order. Compare the caliper with template N228P and your planned wheel before mounting, keeping the 18.0 inch minimum wheel diameter in mind. Because this is a braking system, have a qualified technician check the completed installation before the vehicle returns to service.
What’s included
The kit includes the 6S caliper, the 14-inch rotor, the mounting brackets and the hardware.
Not included: park brake components, which are reused from the factory setup. Wheels and tires are also not part of the kit.
