Fixing Chevy Glow Plug Fail

Certain 2018-2019 Chevy Silverado trucks equipped with a 6.6L diesel engine may have a condition that could cause the engine glow plugs to fail. If this occurs, the MIL will be illuminated and a DTC will set (P0671-P0678...glow plug circuit open; P1338-P133F...glow plug offset exceeded learning limit; P06C5-P06CC...glow plug incorrect).

Information courtesy of Mitchell 1

Mike Mavrigian

Nov. 30, 2022

The engine may be hard to start or the engine may run rough immediately after the engine starts. Perform diagnosis according to the appropriate SI troubleshooting chart for the DTC. If diagnosis does lead to glow plug replacement, replace the glow plug(s) in question.

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.