Which cars report code C060B?

Code C060B is named in 3 US owner complaints. Models: 3, model years 2021–2025. Chevrolet Colorado, GMC Sierra 1500, GMC Sierra 2500.

C060B code: Left Park Brake Actuator Control Circuit/Open

Q: What does code C060B mean?

Left Park Brake Actuator Control Circuit/Open. How to read C060B: the letter C means chassis (brakes, ABS, steering, suspension); the second digit 0 marks a generic SAE code shared by all makes; the last three characters 60B identify the specific fault.

Code C060B is named in 3 US owner complaints. Models: 3, model years 2021–2025.

What the code means

Left Park Brake Actuator Control Circuit/Open. Generic meaning per SAE J2012 (the same for all makes).

How to read C060B: the letter C means chassis (brakes, ABS, steering, suspension); the second digit 0 marks a generic SAE code shared by all makes; the last three characters 60B identify the specific fault.

ABS/ESC codes: wheel speed sensors, the ABS hydraulic unit and pump, brake booster, pressure and yaw sensors. A hit to a wheel or suspension often damages the wheel speed sensor or its wiring, so on a damaged car this code is a reason to inspect the hub, knuckle and control arms, not just swap the sensor.

Key figures

Complaints with this code: 3
Models: 3
Model years: 2021–2025

Which models and years

Models whose owners name this code (3). Years link to the model year problems page.

Model	Years	Complaints
Chevrolet Colorado	2025	1
GMC Sierra 1500	2021	1
GMC Sierra 2500	2021	1

Components named together with the code

Component as the owner filed it (one complaint can list several).

Service brakes 3

Complaints by model year

2021 2
2025 1

What to do if an auction car has this code

Inspect the wheel and suspension on the impact side: the wheel speed sensor is often damaged together with the hub or knuckle.
Check whether the ABS and ESC lights stay on after start-up.
After replacing sensors or the hydraulic unit, bleeding and scan tool adaptation may be required.

What owners report

Excerpts of owner complaints in the original wording. Owner statements not verified by the regulator; personal data removed.

On October 19, 2026, approximately five months later, the truck displayed a "Service Parking Brake" warning. The dealer documented DTCs C060B and C2A21 and found brake fluid leaking through the left-rear caliper into the parking-brake actuator.
Chevrolet Colorado 2025 · 2026-10
The left rear internal "top-hat" parking brake shoes suffered a total manufacturing bonding failure, causing the friction lining to completely delaminate and detach from the metal backing plates inside the rotor hub. This triggered Diagnostic Trouble Code (DTC) C060B (Left Park Brake Actuator Circuit).
GMC Sierra 2500 2021 · 2026-08
On Aug 7, 2024 I returned the truck to the dealer with the fault codes C1114 & C060B caused by a failure of the parking brake actuator. It was impossible to use the emergency brakes when the codes were present. For several months after the repair, brake faults would appear and disappear randomly.
GMC Sierra 1500 2021 · 2026-01

Related codes

Sources: public official US data (owner complaints) and the SAE J2012 standard. Complaints are owner statements not verified by the regulator. A code from a complaint does not replace a scan tool diagnosis. Data updated 2026-11-10.