Nugeon 99P17378A Disc Brake Caliper - Rear Left

Rear Left Disc Brake Caliper for Select GM and Cadillac

This Nugeon TechShield 360 brake caliper is a remanufactured rear left disc brake caliper built for select Cadillac, Chevrolet, and GMC applications. Part number 99P17378A is specified with a 54 mm phenolic piston, aluminum casting, and a rust-preventative grey finish for service replacement on supported vehicles.

Compatible With rear left brake service on 2003-2006 Chevrolet Silverado 1500, 2003-2006 GMC Sierra 1500, and 2003-2011 Cadillac DTS and DeVille applications listed below. The TechShield 360 line focuses on corrosion-resistant brake hydraulics for direct-fit repair work.

Key Features

• Remanufactured disc brake caliper for rear left position
• 54 mm single phenolic piston for hydraulic actuation
• Aluminum housing with rust-preventative grey finish
• Bracket included for listed applications
• Bleeder screw included; banjo bolt inlet fitting
• Caliper slides, dust boots, and brake pad installation hardware included
• Brake pads not included
• Housing cast number: K244-079C

Detailed Description

Nugeon 99P17378A is a rear left disc brake caliper in the TechShield 360 line, engineered as a remanufactured hydraulic replacement for vehicles that use a 1-piston rear caliper setup. The aluminum casting helps reduce weight, while the phenolic piston and dust boots support consistent brake operation in everyday service. This caliper includes the bracket, slides, bleeder screw, and pad hardware noted in the product data, making it a practical replacement for brake repair on Cadillac DTS, Cadillac DeVille, Chevrolet Silverado 1500, and GMC Sierra 1500 applications.

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

What It Helps Fix

• Brake drag or uneven rear braking on the left side
• Leaking caliper housing or damaged piston seals
• Corrosion on the caliper body or slide components
• Soft or inconsistent brake pedal response caused by hydraulic caliper wear
• Noise or poor pad movement related to worn caliper hardware

Installation Notes and Tips

Verify rear left fitment against the vehicle listing before installation. This caliper uses an M10-1.0 inlet thread with a banjo bolt connection and an M10-1.0 bleeder screw thread. Brake pads are not included, so reuse or replace pads as needed during service. Bleeder screw cap, anti-squeal shims, and bracket mounting bolts are not included.

• Fits 2006-2011 Cadillac DTS, rear left, supplied with mounting bracket; HD brakes
• Fits 2003-2005 Cadillac DeVille, rear left, supplied with mounting bracket; HD brakes (J55), 10.4mm housing bolt hole
• Fits 2006 Chevrolet Silverado 1500, rear left, supplied with mounting bracket; w/ 1-piston caliper
• Fits 2003-2004 Chevrolet Silverado 1500, rear left, supplied with mounting bracket; w/ 1-piston caliper
• Fits 2005 Chevrolet Silverado 1500, rear left, supplied with mounting bracket; w/ JC3, JH1
• Fits 2005 Chevrolet Silverado 1500, rear left, supplied with mounting bracket; w/ JC3, JH1, wo/ limited slip differential
• Fits 2006 GMC Sierra 1500, rear left, supplied with mounting bracket; w/ 1-piston caliper
• Fits 2003-2004 GMC Sierra 1500, rear left, supplied with mounting bracket; w/ 1-piston caliper
• Fits 2005 GMC Sierra 1500, rear left, supplied with mounting bracket; w/ JC3, JH1
• Fits 2005 GMC Sierra 1500, rear left, supplied with mounting bracket; w/ JC3, JH1, wo/ limited slip differential

Quality Assurance

TechShield 360 is Nugeon’s brake hydraulics line for corrosion-focused replacement parts. This remanufactured caliper is built to match the listed OE-style fitment and hardware configuration for the supported Cadillac, Chevrolet, and GMC rear left applications.