Overview
The Baer Brakes Extreme Plus rear brake system, part number 4302421CY, is a complete rear disc brake kit for GM C/K 1500 trucks and SUVs that have factory rear disc brakes and a manual park brake. Baer lists it for 1999–2019 Chevrolet Silverado 1500 and GMC Sierra 1500 trucks, 2000–2020 Chevrolet Tahoe and GMC Yukon SUVs, 2000–2014 Chevrolet Suburban 1500 and 2015–2020 Chevrolet Suburban models, and the Cadillac Escalade range.
The kit pairs a 1-piece Monoblock, 6-piston, 6S caliper with a 15 inch two-piece slotted, drilled and zinc-plated rotor. The caliper is CNC machined from US-sourced 2618 aluminum forging, finished in a Comp Yellow powder coat, and manufactured in Phoenix, AZ. Baer describes the Extreme Plus as a performance-grade system, and the pads use the popular D1247 pad type.
Key features
- 1-piece Monoblock, 6-piston, 6S caliper, manufactured in Phoenix, AZ
- CNC machined from US-sourced 2618 aluminum forging with a powder coated Comp Yellow finish
- Stainless steel pistons, abutments and noise suppression clips
- Staggered pistons to minimize uneven pad wear
- Dual seals for dust, weather and pressure
- 2-piece slotted, drilled, zinc-plated rotor with billet aluminum hat
- Rotors pre-assembled with NAS high grade stainless hardware
- Uses the popular D1247 pad type
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302421CY |
| UPC | 90127943878 |
| Sold as | Kit |
| Axle | Rear |
| Caliper | 1-piece Monoblock, 6-piston, 6S, floating type |
| Caliper color | Comp Yellow |
| Caliper body material | 2618 aluminum forging |
| Rotor outside diameter | 15.0 inch |
| Rotor type | 2-piece |
| Rotor construction | Vented |
| Rotor surface | Slotted, drilled and zinc plated |
| Rotor thickness | 1.25 |
| Pad FMSI number | D1247 |
| Wheel bolt pattern | 6×5.50 |
| Lug count | 6 lug |
| Minimum wheel diameter | 19.0 inch |
| Template | N228U |
| Hardware | NAS high grade stainless |
| Grade type | Performance |
| Park brake included | No, reuses OE park brake |
| Hoses | Reuses OE hoses |
| Country of origin | USA |
Vehicle fitment
Baer’s manufacturer fitment list covers 1999–2019 Chevrolet Silverado 1500 and GMC Sierra 1500 trucks, 2000–2020 Chevrolet Tahoe and GMC Yukon, 2000–2014 Chevrolet Suburban 1500 and GMC Yukon XL 1500, 2015–2020 Chevrolet Suburban and GMC Yukon XL, 2002–2006 and 2007–2013 Chevrolet Avalanche, 2002–2020 Cadillac Escalade, 2003–2020 Cadillac Escalade ESV, and 2002–2013 Cadillac Escalade EXT.
Years outside these ranges and vehicles not on this list, such as the Chevrolet Colorado and GMC Canyon, are not covered. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Check the N228U template against your wheel before mounting. Baer states the 15.0 inch Extreme Plus fits most 19 inch or larger wheels, and the minimum wheel diameter is 19.0 inch. Because wheel designs vary, Baer cannot guarantee fit into every wheel style. Brake work is best done by a qualified technician with the vehicle safely supported on stands.
What’s included
The kit includes the 6S Monoblock caliper, the 2-piece rotors pre-assembled with NAS high grade stainless hardware, and all brackets and hardware.
Not included: The park brake components and brake hoses are not part of the kit; the existing OE park brake and hoses are reused.
