NHTSA ID Number: 10198838 Manufacturer Communication Number: 17NA021   Summary This service bulletin provides a procedure for replacing the oil pump, power brake booster and power brake booster vacuum hose to eliminate a hard brake pedal and/or air type noise heard upon brake apply due to oil in the brake booster.     19 Affected Products Vehicles ... Read more

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NHTSA ID Number: 10145479 Manufacturer Communication Number: PIT5361D Summary This Preliminary Information communication provides information to the technician on the steps to diagnose and repair vehicles that may have issues were the customer will need increased effort to depress the brake pedal. Technician may find fluid in the brake booster and/or the booster vacuum line. Technician will ... Read more

The post Diagnostic Tip – Additional Brake Pedal Effort – 2014-2019 Cadillac Chevrolet GMC first appeard on GM - OEMDTC and is written by oemdtc