Stoptech 126.66041SL Disc Brake Rotor - Rear Left

StopTech Slotted Rear Brake Rotor

The StopTech Sport Slotted Disc Brake Rotor, part number 126.66041SL, is a direct replacement rear left rotor for factory brake systems and stock calipers. It is built for drivers who want improved braking response, cleaner pad contact, and a rotor that presents well behind open wheels.

With a 325 mm outside diameter, 20.0 mm nominal thickness, vented construction, and a coated hat finish, this rotor is engineered for consistent rear braking performance on select Chevrolet and GMC trucks, SUVs, and vans.

Key Features

• StopTech Sport Slotted Disc Brake Rotors line for factory-style replacement fitment
• Slotted surface helps move heat and brake dust away from the pad face
• Slotting helps reduce pad glazing and improve initial bite
• Black e-coating helps protect against corrosion
• High-carbon metallurgy is used in most applications for quieter operation and improved crack resistance
• Vented rotor design for rear brake cooling
• Rear left position application
• Part number 126.66041SL

Product Details

StopTech 126.66041SL is a one-piece disc brake rotor made for stock-caliper brake systems. The slotted face is intended to support more stable braking in wet and dry conditions by helping clear dust and heat from the pad contact area. The rotor measures 12.795 inches in outside diameter, 3.358 inches in overall height, and 0.787 inches nominal thickness, with a 5.500-inch bolt circle and six lug holes. It also features a 78.7 mm center hole and straight vane construction.

This rotor is a strong match for drivers searching for a rear left brake rotor for 1999-2007 Chevrolet Silverado 1500, 1999-2007 GMC Sierra 1500, 2003-2005 Chevrolet Astro, or 2003-2005 GMC Safari applications. It also serves select 2000-2002 Chevrolet Tahoe, Suburban 1500, Avalanche 1500, and GMC Yukon models, along with Silverado 1500 HD and Sierra 1500 HD fitments listed below. The StopTech 126.66041SL is built for direct replacement use, not a custom brake conversion.

Common Brake Issues It Can Address

• Brake fade caused by heat buildup in repeated stops
• Glazed pads that reduce pedal response
• Brake dust accumulation on the rotor face
• Corrosion on exposed rotor surfaces
• Uneven braking feel from worn rear rotors

Installation Notes and Fitment

Install on the rear left position only where the vehicle uses the listed rear disc brake configuration. Confirm rotor dimensions, bolt pattern, and axle/brake setup before installation. This part cross-references common OE-style rear rotor applications for the same platform.

• Fits 2007 Chevrolet Silverado 1500 Classic, rear left, Classic GMT 800
• Fits 2007 GMC Sierra 1500 Classic, rear left, Classic GMT 800
• Fits 2005-2006 Chevrolet Silverado 1500, rear left
• Fits 1999-2001 Chevrolet Silverado 1500, rear left
• Fits 2005-2006 GMC Sierra 1500, rear left
• Fits 1999-2001 GMC Sierra 1500, rear left
• Fits 2003-2005 Chevrolet Astro, rear left
• Fits 2003-2005 GMC Safari, rear left
• Fits 2004 Chevrolet Silverado 1500, rear left, 6 lug wheels; 2 wheel steering; 325 mm rear disc
• Fits 2004 GMC Sierra 1500, rear left, 6 lug wheels; 2 wheel steering; 325 mm rear disc
• Fits 2002-2003 Chevrolet Silverado 1500, rear left, 2 wheel steering; 325 mm rear disc
• Fits 2002-2003 GMC Sierra 1500, rear left, 2 wheel steering; 325 mm rear disc
• Fits 2002 Chevrolet Avalanche 1500, rear left, single piston rear caliper
• Fits 2001-2002 Chevrolet Suburban 1500, rear left, except limited slip axle
• Fits 2001-2002 Chevrolet Tahoe, rear left, except limited slip axle
• Fits 2001-2002 GMC Yukon, rear left, except limited slip axle
• Fits 2002 GMC Yukon XL 1500, rear left, except limited slip axle
• Fits 2001 Chevrolet Silverado 1500, rear left, except limited slip rear end
• Fits 2001 Chevrolet Silverado 1500 HD, rear left
• Fits 2001 GMC Sierra 1500, rear left, except LSD
• Fits 2001 GMC Sierra 1500 HD, rear left
• Fits 2000-2001 GMC Yukon XL 1500, rear left, except limited slip axle
• Fits 2000 Chevrolet Suburban 1500, rear left, except limited slip axle
• Fits 2000 Chevrolet Tahoe, rear left, except limited slip axle
• Fits 2000 GMC Yukon, rear left, except limited slip rear axle

Quality Assurance

StopTech Sport Slotted Disc Brake Rotors are built with corrosion-resistant coating and, in most applications, high-carbon metallurgy for improved durability and quieter operation. The part number 126.66041SL is engineered as a direct replacement rotor for factory brake systems and stock calipers.