Checking Chevy Wiring Harness

This bulletin applies to 2017 Chevy Bolt EV vehicles. The MIL may be on accompanied by DTC P2798. The vehicle speed may be limited to 32 mph. This condition may be caused by a damaged wire insulation, causing a short to ground or corrosion in the command signal line of G5 transmission fluid pump harness

Information courtesy of Mitchell 1

Mike Mavrigian

Oct. 12, 2022

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Examples of harness damage.
Photo Credit: Mitchell 1

Raise and support the vehicle and remove the left front wheel and wheelhouse liner. Disconnect the transmission fluid pump electrical connector. Inspect the repair the G5 harness, making sure that the harness is routed correctly and not resting on any vehicle components. If harness damage is found, make the repair and tape the harness with a double layer of woven polyester electrical tape.

About the Author

Information courtesy of Mitchell 1

Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.

Mike Mavrigian

Motor Age Editor

Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety of specialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.