Centric 320.66017F Disc Brake Rotor - Front

Centric GCX Front Brake Rotor Overview

Centric GCX Elemental Protection Disc Brake Rotor, part number 320.66017F, is a front vented rotor built for OE-style braking performance and corrosion resistance. It is a fitment-based replacement for select Chevrolet S10, GMC Sonoma, Isuzu Hombre, Chevrolet Blazer, GMC Jimmy, S10 Blazer, and S15 Jimmy front brake applications.

The GCX Full Coating design uses Centric’s RS200 finish on non-mating surfaces to help protect the rotor from rust while maintaining a clean appearance over time. For shoppers searching for a front brake rotor for 1994-2003 Chevrolet S10 or 1994-2003 GMC Sonoma, this rotor is built around the vehicle’s original metallurgy and brake pad friction requirements.

Key Features

• Part number 320.66017F
• Front disc brake rotor with vented construction
• Fully coated disc finish and coated hat finish
• Smooth surface type for consistent pad contact
• ABS tone ring included
• 5-lug hub-and-rotor mounting pattern
• Outside diameter: 266.0 mm (10.472 in.)
• Nominal thickness: 26.3 mm (1.035 in.)
• Discard thickness: 24.5 mm (0.965 in.)
• Center hole diameter: 72.0 mm (2.835 in.)
• Vane style: straight

Product Details

Centric’s GCX Elemental Protection line is application-specific, with coating patterns and metallurgy selected to match OE brake requirements. This rotor uses Centric’s advanced RS200 coating on non-mating surfaces to help resist rust and corrosion, while the rotor metallurgy is matched to the vehicle’s original brake system profile. That makes 320.66017F a practical choice for drivers maintaining a Chevrolet S10 front brake rotor setup or replacing a GMC Sonoma front rotor with an OE-style part.

Fits 1994-2003 Chevrolet S10, front; fits 1994-2003 GMC Sonoma, front; fits 1996-2000 Isuzu Hombre, front; fits 1995-1997 Chevrolet Blazer, front; fits 1992-1997 GMC Jimmy, front; fits 1991-1994 Chevrolet S10 Blazer, front; fits 1991 GMC S15 Jimmy, front.

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

Common Problems This Rotor Can Address

• Rust buildup on exposed rotor surfaces
• Brake pulsation caused by worn or below-spec rotors
• Reduced braking consistency from rotor wear
• Corrosion on the hat and non-mating surfaces
• Fitment issues when replacing an OE-style front rotor on S10, Sonoma, or Jimmy platforms

Installation Notes and Tips

Verify rotor dimensions, hub bore, bolt circle, and ABS tone ring requirements before installation. This rotor is a front application with a vented design, so it should be matched to the vehicle’s original front brake configuration. Inspect pads, calipers, and wheel bearings during service to help ensure even rotor wear and proper braking performance.

Quality Assurance

Centric engineers the GCX line to align with OE performance targets and vehicle-specific metallurgy. The coated finish is intended to provide added protection against rust and corrosion across the rotor’s non-mating surfaces, helping preserve appearance and service life on the vehicle.