Overview
The Baer Brakes Extreme Plus 4302421R is a red rear disc brake system for GM C/K 1500 trucks from 1999 to 2019 and C/K 1500 SUVs from 2000 to 2020. Chevrolet, GMC and Cadillac models with factory rear disc brakes and a manual park brake are the intended vehicles.
The 15-inch rotor fits wheels 19 inches or larger, and the kit takes D1247 brake pads. Pre-assembled rotors, all brackets and hardware, and NAS high grade stainless hardware come in the box. Compare the N228U template with the wheel before mounting.
Key features
- Red powder coated finish on the 6S caliper
- Stainless steel pistons, abutments and noise suppression clips
- Staggered pistons that help reduce uneven pad wear
- Dual dust, weather and pressure seals
- Billet aluminum hat on the two-piece rotor
- Caliper machined from 2618 aluminum forging that is US sourced
Caring for a painted caliper
Powder coated calipers need gentle care to keep the red finish looking good over time. Brake dust and road salt can build up on the caliper body, and heat from repeated stops can dull or chip the coating. Clean the caliper with mild soap and water instead of strong solvents, and keep cleaners away from the pad and rotor area.
A coated caliper does not change how the brakes work. Pads, rotor and pistons do the braking, so a worn pad or scored rotor needs attention regardless of caliper color. Inspect the caliper boots and bleeder screws whenever the pads are changed, and touch up small chips with matching high-temperature paint once the surface is clean and dry.
- Wash brake dust off the caliper at regular oil changes
- Keep cleaners and penetrating oils off the pads
- Replace caliper boots that show cracks before they tear
- Use a lint-free cloth on the rotor face
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302421R |
| UPC | 844165049791 |
| Caliper | 6S, one-piece monoblock, 6-piston |
| Caliper color | Red |
| Caliper type | Floating |
| Rotor outside diameter | 15.0 Inch |
| Rotor thickness | 1.25 |
| Rotor type | 2-Piece |
| Rotor material | Iron with aluminum hat |
| Surface type | Slotted, drilled and zinc plated |
| Pad FMSI number | D1247 |
| Template | N228U |
| Minimum wheel diameter | 19.0 Inch |
| Lug count | 6 Lug |
| Wheel bolt pattern | 6×5.50 |
| Grade type | Performance |
| Hose material | Re-uses OE hoses |
| Country of origin | US |
Vehicle fitment
The manufacturer fitment list for this red kit names the following, all with factory rear disc brakes and a manual park brake: 2007–2013 Chevrolet Avalanche, 2002–2006 Chevrolet Avalanche 1500, 2015–2020 Chevrolet Suburban, 2000–2014 Chevrolet Suburban 1500, 2000–2020 Chevrolet Tahoe, 1999–2019 Chevrolet Silverado 1500, 1999–2019 GMC Sierra 1500, 2000–2020 GMC Yukon, 2015–2020 GMC Yukon XL, 2000–2014 GMC Yukon XL 1500, 2002–2020 Cadillac Escalade, 2003–2020 Cadillac Escalade ESV and 2002–2013 Cadillac Escalade EXT.
Trucks outside the 1500 applications, such as heavy-duty 2500 and 3500 models, are not covered, and vehicles without a rear disc setup and manual park brake do not match this kit. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Rotors ship pre-assembled, so check fit against the N228U template and the wheel before mounting. The kit re-uses the existing hoses. Rear brake service calls for a qualified technician familiar with GM rear disc calipers.
What’s included
The box holds the 6S caliper, two-piece rear rotors with billet aluminum hats, pre-assembled NAS stainless rotor hardware, and all brackets and hardware.
Not included: front rotors and lug nuts. Factory hoses are reused rather than supplied.
