Overview
The Baer Brakes 4301525GB Extreme Plus is a Grabber Blue front brake system for GM C/K 1500 trucks from 1999 to 2023 and GM C/K 1500 SUVs from 2000 to 2023. It uses a 1-piece monoblock, 6-piston, 6S caliper clamping a 15.0 inch vented rotor, which is designed to suit most 19 inch or larger wheels.
This part suits owners of the listed Chevrolet, GMC and Cadillac models who want a larger front brake setup. The caliper is made in Phoenix, Az from US-sourced 2618 aluminum forging, and the rotor comes pre-assembled with its hardware.
Key features
- Fixed 1-piece monoblock caliper with 6 pistons
- Grabber Blue powder-coated finish
- Stainless steel pistons, abutments and noise suppression clips
- Staggered pistons to minimize uneven pad wear
- Dual seals against dust, weather and pressure
- Vented rotor with slotted, drilled and zinc-plated surface, billet aluminum hat, pre-assembled with stainless hardware
Before you buy
Before buying a front brake system for a GM full-size truck or SUV, confirm the vehicle’s wheel size, offset and tire diameter. A larger rotor and caliper only work well when the wheel clears both, and a wheel that is close to the caliper can rub under load or at full steering lock.
Front brake upgrades are usually planned alongside other maintenance. Wheel bearings, hubs, brake hoses and the steering linkage should be in good condition, because a loose hub or a cracked hose can limit how much the new brakes improve stopping.
Monoblock calipers are often chosen for their stiffness under braking, which can help pedal feel. Pads and rotors still wear over time, so regular inspection of pad thickness and rotor surface should continue after the new system is in service.
- Check wheel offset and clearance before ordering
- Inspect hubs and wheel bearings during install
- Plan pad and rotor inspections at regular service intervals
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4301525GB |
| UPC | 90127939161 |
| Caliper | 1-piece monoblock, 6-piston, 6S |
| Caliper color | Grabber Blue |
| Caliper type | Fixed |
| Caliper body | CNC machined 2618 aluminum forging |
| Pistons | Stainless steel |
| Brake pad type | D1247 (FMSI) |
| Rotor outside diameter | 15.0 inch |
| Rotor construction | Vented, 2-piece |
| Rotor thickness | 1.25 |
| Rotor surface | Slotted, drilled and zinc-plated |
| Rotor hat | Billet aluminum |
| Lug count | 6 lug |
| Wheel bolt pattern | 6×5.50 |
| Minimum wheel diameter | 19.0 inch |
| Hardware | NAS high grade stainless steel, pre-assembled |
| Hoses | Re-uses OE hoses |
| Grade | Performance |
| Template | N077U |
| Axle | Front |
| Format | Kit |
| Country of origin | USA |
Vehicle fitment
Fitment runs from the 1999 Silverado 1500 and Sierra 1500 through 2023 models, and includes Tahoe and Yukon (2000-2023), Suburban (2015-2023 and 2000-2014 Suburban 1500), Yukon XL (2015-2023 and 2000-2014 Yukon XL 1500), Avalanche (2002-2006 and 2007-2013), and Escalade, Escalade ESV and Escalade EXT (2002-2023, 2003-2023 and 2002-2013).
The application note reads 99-25 for trucks and 00-25 for SUVs, which extends past the list’s 2023 end year, so confirm the year.
Not on the list: heavy-duty Silverado models and Chevrolet Colorado or GMC Canyon models. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Rotors are supplied pre-assembled with NAS high grade stainless hardware, and all mounting brackets and hardware come in the package. The kit re-uses OE hoses, so have them examined for condition at install. Have a qualified technician fit the system and verify wheel clearance against the 19.0 inch minimum before the vehicle is driven.
What’s included
The package includes the Grabber Blue 6S monoblock caliper, the 15.0 inch vented rotor pre-assembled with its hardware, and the mounting brackets with all hardware.
Not included: brake hoses, because the system is designed around the existing OE hoses.
