Overview
The Baer Brakes 4301525MG Extreme Plus is a Monster Green front brake system for GM C/K 1500 trucks and SUVs, covering 1999 to 2023 trucks and 2000 to 2023 SUVs. It combines a 1-piece monoblock, 6-piston, 6S caliper with a 15 inch vented rotor and uses the D1247 pad type.
The 15 inch Extreme Plus is designed for most 19 inch or larger wheels, but wheel styles vary, so fit with every wheel cannot be confirmed. Compare the N077U template with your planned wheel before installation. Fitment runs from 1999 to 2023 across Chevrolet, GMC and Cadillac models.
Key features
- 1-piece monoblock caliper with 6-piston 6S design, manufactured in Phoenix, Az
- Powder-coated Monster Green finish
- CNC machined from US-sourced 2618 aluminum forging
- Stainless steel pistons, abutments and noise suppression clips
- Staggered pistons for more even pad wear
- Dual seals for dust, weather and pressure
- Vented 15.0 inch rotor, 2-piece slotted, drilled and zinc-plated, with billet aluminum hat
Choosing a wheel setup
A bigger caliper and rotor set changes how much room is left behind the wheel, so wheel choice matters as much as the brake kit itself. Offset, backspacing and spoke design all affect whether the caliper clears. A wheel that clears at rest can still touch at full steering lock, especially on trucks that have been lifted or leveled.
Suspension height and tire size also change the geometry. Taller tires move the wheel outward and can reduce clearance at the caliper, while a leveling kit can alter how the caliper sits relative to the wheel. Recheck clearance after any suspension change, and keep the hardware and hoses inspected whenever the wheels come off.
- Compare wheel backspacing with the caliper body
- Recheck clearance after any lift or leveling work
- Inspect the pre-assembled hardware at each pad change
- Look for contact at full steering lock
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4301525MG |
| UPC | 90127939215 |
| Caliper | 1-piece monoblock, 6-piston, 6S |
| Caliper color | Monster Green |
| 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 covers the 2002-2023 Cadillac Escalade, 2003-2023 Escalade ESV, 2002-2013 Escalade EXT, 2007-2013 and 2002-2006 Chevrolet Avalanche, 1999-2023 Chevrolet Silverado 1500, 2015-2023 and 2000-2014 Chevrolet Suburban, 2000-2023 Chevrolet Tahoe, 1999-2023 GMC Sierra 1500, 2000-2023 GMC Yukon, and 2015-2023 GMC Yukon XL and 2000-2014 GMC Yukon XL 1500. Heavy-duty Silverado models and Chevrolet Colorado or GMC Canyon models are not covered. Confirm your vehicle’s year, model and trim before ordering.
Truck fit years begin in 1999 and SUV fit years begin in 2000, running through 2025, which is later than the 2023 end year used for the other entries. Confirm your model year before ordering.
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 arrive pre-assembled with NAS high grade stainless hardware, and all mounting brackets and hardware are included. The kit re-uses OE hoses, which should be inspected for wear before they are reconnected. Have a qualified technician install the system and verify wheel clearance against the 19.0 inch minimum before driving.
What’s included
The package contains the 1-piece monoblock 6S caliper in Monster Green, the 15.0 inch vented rotor pre-assembled with stainless hardware, and all mounting brackets and hardware.
Not included: new brake hoses, because the system re-uses OE hoses.
