Overview
The Baer Brakes Extreme rear brake system, part number 4302136S, is a silver rear disc brake kit for GM 1500 trucks from 1999 to 2019 and GM 1500 SUVs from 2000 to 2020. It is intended for vehicles that already have rear disc brakes and a manual park brake, and it pairs a six-piston monoblock caliper with a 14-inch slotted and drilled rotor.
The caliper is a one-piece monoblock unit with six stainless steel pistons in a staggered pattern that helps reduce uneven pad wear. It is machined in Phoenix, AZ, from CNC-cut 2618 aluminum forging and is sized around the D1247 pad type. Chevrolet Silverado and Suburban, GMC Sierra and Yukon, Chevrolet Tahoe and Cadillac Escalade models are covered.
Key features
- One-piece monoblock six-piston 6S caliper with a powder coated silver finish
- Stainless steel pistons, abutments and noise suppression clips
- Staggered pistons designed to minimize uneven pad wear
- Dual dust, weather and pressure seals
- 14-inch slotted, drilled, zinc-plated rotor with an aluminum hat
- Uses the D1247 disc brake pad type
- Brackets and hardware included
- Fits most wheels 18 inches or larger
Rear brake service tips
Rear disc calipers work alongside the park brake on many GM trucks, so a manual park brake setup needs its own attention during service. Pad wear is often uneven when a vehicle is driven mostly on pavement and then taken off road, so check both pads on each side whenever the wheels are off. Rust on sliding surfaces can cause a caliper to drag, which shows up as heat near the wheel and a pull under braking.
Rotors and pads are commonly replaced together, since a new rotor wears a fresh pad faster if the old pad is glazed. Inspect the hose for cracks and swelling, and look for fluid seeping around the piston seals. Bleed the system after any hose or caliper work so the pedal stays firm.
- Check pad thickness on both sides
- Look for scoring or blue heat tint on the rotor face
- Inspect the park brake cable for stiffness
- Replace hoses that show cracks or bulges
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302136S |
| UPC | 844165042693 |
| Sold as | Kit |
| Axle | Rear |
| Caliper | 6S, one-piece monoblock, six pistons, floating |
| Caliper color | Silver |
| Caliper finish | Powder coated |
| Rotor outside diameter | 14.0 inches |
| Rotor thickness | 1.15 inch |
| Rotor type | 1-piece |
| Rotor style | Vented, slotted, drilled |
| Rotor material | Iron with aluminum hat, zinc plated |
| Pad type | D1247 (FMSI) |
| Wheel bolt pattern | 6×5.50 |
| Lug count | 6 lug |
| Minimum wheel diameter | 18.0 inches |
| Template | N228P |
| Emission code | 6 |
| Grade | Performance |
| Hose | Re-uses OE |
| Park brake | Manual park brake; park brake hardware not included |
| Country of origin | US |
Vehicle fitment
Covered vehicles are 1999–2019 Chevrolet Silverado 1500, 1999–2019 GMC Sierra 1500, 2000–2020 Chevrolet Tahoe, 2000–2020 GMC Yukon, 2002–2020 Cadillac Escalade, 2003–2020 Cadillac Escalade ESV, 2002–2013 Cadillac Escalade EXT, 2007–2013 Chevrolet Avalanche, 2002–2006 Chevrolet Avalanche 1500, 2015–2020 Chevrolet Suburban, 2000–2014 Chevrolet Suburban 1500, 2015–2020 GMC Yukon XL and 2000–2014 GMC Yukon XL 1500.
This kit covers rear disc brakes with a manual park brake only and does not cover front axles. Model years after 2020 are not on the list, so 2021 and newer GM models are not covered. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Brackets and hardware are supplied for the caliper mount, while the factory hoses and park brake components are reused. Check the N228P template against your wheels before fitting, because the minimum wheel diameter is 18.0 inches.
What’s included
The kit includes the 6S caliper, a 14-inch rear rotor, brackets and mounting hardware.
Not included: lug nuts, and park brake hardware, which is reused from the factory setup.
