ACDelco Rear Brake Rotor for GM SUVs & Trucks — 18A2332A (GM 19241843) Silver, Direct-Fit, Improved Cooling

ACDelco Silver Rear Brake Rotor 18A2332A (GM 19241843) is a single replacement rear rotor engineered for reliable stopping, improved cooling, and quieter operation on select GM SUVs and trucks.

This ACDelco Silver rear rotor is a direct-fit replacement designed for a range of Cadillac, Chevrolet, and GMC models from the early-to-mid 2000s. Built from durable cast iron with a multi-alloy structure and an optimized vane pattern, the rotor focuses on controlled heat dissipation and stable braking performance. The non-directional finish helps reduce noise and promotes even pad wear, making it a practical, value-oriented option backed by GM engineering.

What makes this rotor handle heat better during heavy use?

The 18A2332A rotor uses a multi-alloy construction and a vane layout tailored to its vehicle applications to move heat away from the braking surface faster than a basic solid disc. Improved airflow around the rotor helps reduce fade during repeated stops and maintains more consistent braking feel.

• Application-specific internal vane design improves cooling efficiency
• Multi-alloy cast iron composition resists thermal cracking
• Rounded radius edges add structural strength under heat

How does this rotor reduce noise and vibration?

This rear rotor is finished with a non-directional grind and balanced to minimize noise, vibration, and harshness (NVH). A smoother contact surface encourages even pad seating and reduces the chance of chirps or uneven pulsing under braking.

• Non-directional surface finish for quieter pad contact
• Balanced casting lowers vibration transfer to the vehicle
• Smooth surface reduces thickness variation for stable pedal feel

Will this rotor extend brake pad life and simplify maintenance?

Yes — the clean, uniform rotor face limits eccentric wear patterns that commonly shorten pad life. When paired with properly matched rear brake pads, this rotor helps create a cost-effective service solution that can stretch intervals between replacements.

• Minimized thickness variation reduces uneven pad wear
• Pairs well with ACDelco rear pads for a matched braking kit
• Sold individually so you can replace only the needed side

Which vehicles will this rotor fit and how do I confirm compatibility?

The 18A2332A corresponds to GM part number 19241843 and fits many Cadillac, Chevrolet, and GMC SUVs and light trucks from the 2003–2007 era, including Tahoe, Suburban, Silverado, Sierra, Yukon, and Escalade variants. Use your VIN and the seller’s Confirmed Fit tool to verify exact fitment before ordering.

• Common fits: Chevrolet Tahoe/Suburban, Silverado 1500, GMC Sierra/Yukon, Cadillac Escalade family
• Designed as a rear rotor replacement for select model years 2003–2007
• One rotor included per order; confirm fit with VIN lookup

Who this is for: This rotor is aimed at owners and technicians who need a dependable, GM-backed rear brake rotor at a reasonable price. It suits daily drivers and light-duty truck or SUV users who prioritize consistent braking, reduced NVH, and straightforward installation without the premium cost of specialty rotors. If you maintain a compatible Cadillac, Chevrolet, or GMC from the listed years and want a matched, OEM-related replacement, the ACDelco Silver 18A2332A is engineered to meet those needs while simplifying maintenance decisions.