Centric 320.66048F Disc Brake Rotor - Rear

Centric GCX Rear Brake Rotor for Select GM Minivans

The Centric GCX Elemental Protection Disc Brake Rotor, part number 320.66048F, is a rear solid rotor built for select Buick, Pontiac, and Oldsmobile applications. It features a fully coated disc finish and coated hat finish to help resist corrosion on exposed surfaces.

Compatible With 2002-2007 Buick Rendezvous rear, 2001-2005 Pontiac Aztek rear, 2002-2004 Oldsmobile Silhouette rear, and 2002-2004 Pontiac Montana rear, this rotor is sized for the specified rear brake applications and uses a smooth surface type for service replacement.

Key Features

• Centric GCX Elemental Protection Disc Brake Rotors - Full Coating
• Part number 320.66048F
• Fully coated disc finish with coated hat finish
• Solid rotor design with smooth surface type
• Outside diameter: 11.417 in. / 290.000 mm
• Nominal thickness: 0.433 in. / 11.000 mm
• Discard thickness: 0.354 in. / 9.000 mm
• Overall height: 1.831 in. / 46.500 mm
• 5-lug pattern with 4.500 in. bolt circle diameter
• Center hole diameter: 2.768 in. / 70.300 mm

Product Details

The Centric GCX Elemental Protection line focuses on corrosion-resistant rotor surfaces for everyday brake service. On this rear disc brake rotor, the fully coated finish covers the disc area while the coated hat adds additional protection where rust commonly forms. The solid rotor construction and smooth braking surface support direct replacement service for the listed Buick Rendezvous, Pontiac Aztek, Oldsmobile Silhouette, and Pontiac Montana rear brake applications. Part number 320.66048F is a practical choice when replacing a worn or rusted rear rotor on these vehicles.

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

Common Problems This Rotor Can Address

• Rear brake pulsation caused by rotor wear or thickness variation
• Rust buildup on exposed rotor surfaces
• Noise from a worn or uneven braking surface
• Reduced braking consistency from a rotor at or near discard thickness
• Service replacement needs on rear brake systems for the listed GM models

Installation Notes and Tips

Verify rotor dimensions, hub fit, and bolt pattern before installation. Clean the hub mounting surface thoroughly to help prevent runout-related brake issues, and inspect pads, calipers, and hardware condition during service. Because this rotor is listed for rear applications only, confirm vehicle position before ordering. For best results, follow the vehicle manufacturer’s brake service procedures and torque specifications.

Quality Assurance

Centric GCX rotors are built with coated surfaces to help manage corrosion on the disc and hat areas, supporting long-term service in exposed brake environments. Part number 320.66048F is specified for the listed rear applications on 2001-2007 Buick, Pontiac, and Oldsmobile models.