TSBs

Checking Chevy battery health

Sept. 3, 2024

This bulletin applies to 2014-2018 Chevy Silverado, 2015-2018 Suburban and 2015-2018 Tahoe vehicles equipped with the integrated trailer brake controller.

Motor Age Staff

Related To: Mitchell 1

Address any battery issues first before continuing with normal diagnostics.

This bulletin applies to 2014-2018 Chevy Silverado, 2015-2018 Suburban and 2015-2018 Tahoe vehicles equipped with the integrated trailer brake controller.

Some owners may comment about a Service Trailer Brake message on the DIC. DTCs may be set in the chassis control module including C111B, C1112, C1113 and/or C1114. In addition, there may be a slow crank condition.

These concerns could be caused by low battery voltage due to a battery issue. Before any in-depth diagnostics are performed, the battery state of health should be checked using the EL-50313 Midtronics GR8 battery charger/tester. Address any battery issues first before continuing with normal diagnostics.

About the Author

Motor Age Staff

Motor Age has been publishing technical content for professional automotive technicians since 1899. Our writers have decades of experience and scores of ASE certifications, and they continue to teach new generations of technicians via classrooms all around the globe, as well as through the books and training manuals they've authored.