GMC TSB #08-08-45-004D
2013 GMC Sierra 2500
Affected Component: ELECTRICAL SYSTEM:12V/24V/48V BATTERY
- Summary
- This informational bulletin provides information for installing a diode to solenoid/relay to suppress voltage spikes in conjuction with installation of electrical aftermarket accessories-battery, ignition and ground feeds-(do not splice into wiring harness).