General Motors has started a Customer Satisfaction Campaign to fix certain examples of the 2021 Chevy Silverado 1500 and GMC Sierra 1500 that may have been equipped with faulty brake boost assemblies.
The problem: vehicles involved in this Customer Satisfaction Campaign may have left the factory equipped with faulty eBoost brake unit assemblies.
The hazards: vehicles equipped with these brake boost assemblies may experience function issues over time, based on feedback received from the supplier concerning the condition of the assemblies. This can affect the vehicle’s braking performance, which may increase the risk of a crash.
The fix: dealers are instructed to replace the eBoost brake unit assembly in affected vehicles. Repair parts listed in the relevant service bulletin include the brake master cylinder, threadlocker and brake fluid. Dealers are encouraged not to order relevant repair parts for this Customer Satisfaction Campaign as shelf stock due to the limited initial parts availability.
Number of affected vehicles: a total of 23 vehicles are affected by this problem.
Next steps: GM will notify owners of affected vehicles and instruct them to make an appointment with their dealer. Owners who have questions regarding this Customer Satisfaction Campaign can use the contact information below to reach out to a Chevrolet or GMC customer service rep. It’s worth noting that this is a Customer Satisfaction Campaign and not a safety recall and is thus not being handled by the National Highway Traffic Safety Administration (NHTSA), but rather GM directly.
- GM CSP number: N202324120
- Chevrolet Customer Service: 1-800-222-1020
- GMC Customer Service: 1-800-462-8782