SMU - Revised Engine Electrical and Automatic Transmission - 4L60E/4L65E Subsections - New Caution Statements for Hybrid Truck (PHT) (RPO HP2)

This bulletin is being issued to inform technicians that three new Caution statements have been added to procedures in the Engine Electrical and Automatic Transmission - 4L60E/4L65E subsections of the Service Manual. Please replace the current information in the Service Manual with the following information.

The following information has been updated within SI. If you are using a paper version of this Service Manual, please make a reference to this bulletin on the affected page.

Caution: To reduce the risk of severe shock and burns, always disconnect the 42 volt (42V) energy storage box (ESB) before doing any work to the ESB system. To disconnect the ESB, turn the engine off and turn OFF the service disconnect switch, which is located on the passenger side of the ESB.

Caution: To reduce the risk of severe shock and burns, disable the 42 volt (42V) system anytime you perform service work on or around the energy storage box (ESB). The 42V system will still be active after you have disable the ESB.

Caution: To reduce the risk of severe shock and burns, always treat the 3-phase cable and connectors as if voltage is present and as if the surface of all parts of the cable is hot.