Rear Disc Brake Caliper for 2007-2019 Buick Enclave, Cadillac XTS, Chevy Traverse, GMC Acadia & Saturn Outlook

Rear Disc Brake Caliper for Select Buick, Cadillac, Chevrolet, GMC, and Saturn Applications

Rear-position disc brake caliper for the exact Enclave, XTS, Traverse, Acadia, Acadia Limited, and Outlook model-year ranges listed below.

Critical fitment warning: The source provides two reference numbers but does not specify their left/right mapping, package quantity, engine, drivetrain, trim, rotor diameter, piston diameter or count, mounting-bracket inclusion, hose-port orientation, bleeder configuration, or electronic versus mechanical parking-brake design. Confirm the VIN, exact model and year, intended rear side, original caliper reference and casting, rotor size, bracket, hose connection, bleeder position, and parking-brake actuator or cable arrangement before ordering.

Vehicle Compatibility

• 2008–2017 Buick Enclave — rear disc brake application
• 2013–2019 Cadillac XTS — rear disc brake application
• 2009–2017 Chevrolet Traverse — rear disc brake application
• 2007–2016 GMC Acadia — rear disc brake application
• 2017 GMC Acadia Limited — rear disc brake application
• 2007–2010 Saturn Outlook — rear disc brake application

Not confirmed: 2017 standard GMC Acadia unless it matches the listed Acadia Limited application, front-axle use, model years outside these ranges, or any brake package whose side, casting, bracket, rotor clearance, hose port, bleeder, and parking-brake design do not match the original.

Position and Quantity

• Axle position: Rear
• Side: Not specified
• Package quantity: Not specified

Reference Numbers

18B5059, 18B5058

The source does not map these numbers to left or right and does not state that both are supplied together. Match the original caliper number, side, casting, mounting points, hose port, bleeder position, rotor clearance, and parking-brake configuration.

Package Contents

The source confirms a rear brake caliper but does not confirm whether one or two calipers are supplied. Mounting bracket, slider pins, brake pads, clips, banjo bolt, copper washers, parking-brake motor or cable hardware, brake hose, fluid, and mounting bolts are not confirmed as included. Check the product images and received package before disassembly.

Installation Notes

Brake work is safety-critical and should be performed by a qualified technician. Compare the replacement with the original caliper before installation, including rear side, casting, reference number, mounting spacing, bracket, piston configuration, hose port, bleeder position, rotor clearance, and parking-brake design. Vehicles with an electronic parking brake may require a vehicle-specific service mode and scan-tool procedure; the source does not confirm which listed applications use that system.

Inspect the rotor, pads, hose, parking-brake components, wheel bearing, and brake fluid. Follow the vehicle-specific service procedure for installation, fastener torque, piston retraction, bleeding sequence, electronic parking-brake initialization where applicable, and adjustment. Use the specified brake fluid, remove all air from the hydraulic system, confirm a firm pedal, check for leaks, verify parking-brake operation, and complete the correct pad-bedding procedure before road use.

Frequently Asked Questions

Are both rear calipers included?
The source lists two reference numbers but does not state package quantity. A pair is therefore not claimed.

Which number is left and which is right?
The source does not provide side mapping. Match the original number and physical configuration.

Does this fit a 2017 GMC Acadia?
The source specifically lists the 2017 GMC Acadia Limited. Standard 2017 Acadia fitment is not confirmed.

Is the parking-brake motor or mounting bracket included?
Parking-brake components, bracket, and hardware inclusion are not confirmed.