PowerStop AR8646 Disc Brake Rotor - Rear

Rear OE Stock Replacement Rotor for Heavy-Duty GM Trucks

PowerStop AR8646 is a rear disc brake rotor built as a direct-fit OE stock replacement for select Chevrolet and GMC heavy-duty applications. It is made for rear use on dual rear wheel models and matches the original equipment fit and performance requirements for the listed vehicles.

For shoppers searching for a rear brake rotor for Chevrolet Silverado 3500 HD, GMC Sierra 3500 HD, or Express/Savana 3500 rear brake service, this rotor provides the correct dimensions and vented construction for the specified fitments.

Key Features

• Direct-fit rear disc brake rotor for OE replacement service
• Vented rotor design for rear brake applications
• Outside diameter: 12.80 in. / 324.00 mm
• Nominal thickness: 1.18 in. / 30.00 mm
• Discard thickness: 1.12 in. / 28.50 mm
• Overall height: 5.20 in. / 132.10 mm
• 8 lug holes with a 6.50 in. / 165.10 mm bolt circle
• Rear position fitment for dual rear wheel configurations

Product Details

Power Stop’s Autospecialty line focuses on direct replacement brake components that match original equipment fit and performance expectations. AR8646 is a rear OE stock replacement brake rotor for 2001-2010 Chevrolet and GMC heavy-duty vans and trucks, including Silverado 3500, Silverado 3500 Classic, Silverado 3500 HD, Sierra 3500, Sierra 3500 Classic, Sierra 3500 HD, Express 3500, and Savana 3500 rear applications. This part number, AR8646, is the correct reference for buyers comparing rear brake rotor options for these GM platforms.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What This Rotor Helps Address

• Rear brake pulsation caused by worn rotor surfaces
• Brake noise related to rotor wear or uneven braking surfaces
• Reduced braking consistency from rotors below discard thickness
• Service replacement needs on rear GM dual rear wheel brake systems
• Fitment issues from using the wrong diameter, bolt circle, or lug count

Installation Notes and Tips

Confirm rear axle and dual rear wheel configuration before ordering. Verify the rotor matches the vehicle’s outside diameter, bolt circle, lug count, and thickness specifications. Clean the hub mounting surface before installation and inspect pads, calipers, and hardware condition during brake service. AR8646 is listed for rear position only and should be matched to the exact year, make, and model shown in the fitment data.

Quality Assurance

Power Stop Autospecialty rotors are direct-fit replacement parts built to meet original equipment fit and performance expectations for the listed applications. AR8646 is specified for confirmed rear fitment on 2001-2010 Chevrolet and GMC heavy-duty models, including Silverado 3500 HD and Sierra 3500 HD rear brake service.