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August 10, 2023 Service bulletin

This technical bulletin provides repair information to correct a customer concern of Service Engine Soon...

Chevrolet technical service bulletin 21-NA-214 for 2020 Chevrolet Silverado 2500, 2020 GMC Sierra 2500 and 2020 Chevrolet Silverado 3500 and others.

Bulletin number
21-NA-214
Component
Service brakes, air
Summary
This technical bulletin provides repair information to correct a customer concern of Service Engine Soon Lamp being illuminated. They may also comment on multiple transmission issues including harsh or delayed shifts, slip, surge, shudder, noise, whine, growl, shake and/or vibration. As well as the exhaust brake not working or that they do not feel it. Technicians may find DTCs P2002, P2463, P2459, P144E, P0421, P0422, P0106 P20EE, P129F, P16F3, P20FF, P226D, P249D, P249E, P11CC and / or P11D5.

Owners of these vehicles have filed 47 complaints in the brakes category.

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