Is your defective GMC Terrain actually a LEMON?

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GMC TSB #21NA107

2021 GMC Terrain

TSB Document:

MC-10200126-9999.pdf

Affected Component: ELECTRICAL SYSTEM

Summary: This technical bulletin provides repair information to correct a customer concern of the Service Engine Soon Lamp Illuminated and/or Service Brake Assist Message Displayed, with DTC P0557 Stored.

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Date Published: JUN 11, 2021
NHTSA TSB #: 10200126

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