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trailer brakes

2018-2019 Toyota Tundra trucks equipped with a 5.7L engine and integrated trailer brake controllers may exhibit an intermittent “Trailer Disconnected” message in the combination meter while towing a trailer. The brake control relay with bracket should not be replaced as part of this bulletin. It will be necessary to reprogram the PCM with software version 14.00.019 or later using Techstream 2.0 or Techstream LITE.

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Toyota Trailer Brakes

Some 2018-2019 Toyota Tundra trucks equipped with integrated trailer brake controllers may exhibit an intermittent “Trailer Disconnected” message in the combination meter while towing a trailer. It may be necessary to reprogram the trailer brake controller ECU. Using Techstream 2.0 or Techstream LITE, software version 14.00.019 or later is required.

Trailer Brake Warning

This bulletin applies to 2014-2017 GMC Sierra 1500 and Yukon models with integrated trailer brake systems. Some owners may comment on a Service Trailer Brake message in the DIC.

Trailer Brake Complaint

Some 2016-2017 Toyota Tundra truck owners have expressed dissatisfaction with the braking feel of the integrated trailer brake controller. Revised software for the trailer brake ECU has been developed to provide an alternative trailer braking feel for these customers.