The problem: affected vehicles may have two separate potential conditions. The first problem is related to one of the front calipers, which may have been produced out of specification on the caliper clearance to the rotor, resulting in brake drag. The second problem affects the rear caliper, which may have been damaged while the vehicle was on the assembly line.
The hazards: if left unaddressed, the first problem may lead to reduced pad life, eventually causing the vehicle to pull to the right or left. The assembly line damage in the second issue, meanwhile, may have caused a microcrack in the rear brake caliper’s piston, which can cause the brake fluid to leak. This will also illuminate the brake malfunction indicator lamp (MIL) on the instrument panel, alerting the driver of the issue.
The fix: dealers are instructed to replace both the front and rear brake calipers, which should fix both problems in affected vehicles. These repairs will be performed at no cost to the vehicle owner.
Next steps: GM will notify owners of affected 2021 Chevy Express and GMC Savana vehicles and instruct them to make an appointment with their dealer. Owners who have questions regarding this technical service bulletin can use the contact information below to reach out to Chevrolet or GMC directly. This TSB program will remain in effect until February 28rd, 2023.
- General Motors TSB number: N202325860
- Chevrolet Customer Service: 1-800-222-1020
- GMC Customer Service: 1-800-462-8782
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