15212823 | Genuine GM® Power Brake Booster Assembly 1999-2008 Cab Air Vent Moisture can cause:

Moisture can cause:

Fits 5502-02 For Various Peterbilt And Kenworth PACCAR Engines

Some vehicles enter limp mode to protect the engine

Signs of a Bad Diesel Particulate Filter 2131533:

Blue smoke – oil leaking into the chamber

15212823 | Genuine GM® Power Brake Booster Assembly 1999-2008 Cab Air Vent Moisture can cause:Description: A Power Brake Booster Assembly 15212823 (often just called a brake booster) is a key component in a vehicles braking system that helps reduce the amount of physical effort needed to press the brake pedal and stop the vehicle. The brake booster uses vacuum pressure (or sometimes hydraulic or electric pressure) to amplify the force you apply to the brake pedal. Without it, youd have to press the pedal much harder to slow or stop the