15115

Bulletin number

15115

Component

Electrical system: software

Summary

15115 - service update. This bulletin provides a service procedure to reprogram and update the glow-plug control module with new software on certain 2015 model year chevrolet silverado hd crew, hd crew ltz, hd regular, hd ext, hd ext ltz vehicles equipped with a duramax diesel engine (rpo lml) and certain 2015 model year gmc sierra hd crew, hd crew denali, hd regular, hd ext vehicles equipped with a duramax diesel engine (rpo lml). The software update limits the intake-air heater input voltage to 13.5v. When the system voltage exceeds 13.5v, the heater’s field-effect transistor can generate excessive heat. This heat can cause a short circuit in the transistor and, in rare cases, a fire in the vehicle’s engine compartment.

Owners of these vehicles have filed 91 complaints in the electrical category.