Chassis Mounted Trailer PDM Battery Power Cable Terminal Corrosion

This service bulletin provides instructions on how to inspect and repair battery power cable terminal corrosion on PDM-equipped chassis-mounted trailers.

Affected Vehicles:

• 2017-2023 Chevrolet Silverado 2500/3500 HD
• 2017-2023 GMC Sierra 2500/3500 HD

Condition:

Customers may experience battery power cable terminal corrosion on PDM-equipped chassis-mounted trailers. This may cause the trailer to lose power or experience intermittent electrical problems.

Cause:

The cause of this condition is due to moisture intrusion into the battery power cable terminals. This moisture can cause the terminals to corrode and lose their electrical conductivity.

Correction:

To correct this condition, the battery power cable terminals must be inspected and cleaned. If the terminals are severely corroded, they must be replaced. The following steps outline the repair procedure:

1. Disconnect the negative battery terminal.
2. Remove the battery power cable from the PDM.
3. Inspect the battery power cable terminals for corrosion.
4. If the terminals are corroded, clean them using a wire brush or sandpaper.
5. If the terminals are severely corroded, replace them with new terminals.
6. Reinstall the battery power cable to the PDM.
7. Reconnect the negative battery terminal.

Additional Information:

To prevent this condition from recurring, it is important to keep the battery power cable terminals clean and dry. It is also important to inspect the battery power cable terminals regularly for signs of corrosion.