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TSB Document:

Affected Component: EQUIPMENT

Summary
Customer Satisfaction Program - Certain vehicles equipped with the 6.6l Duramaxdiesel engine (RPO L5P) and optional engine-block heater cord, may have a condition in which the block heater cable function was disabled. Dealers will replace the engine block heater and cord.

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Date Published
MAY 27, 2020
NHTSA TSB #
10176823
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