• Improvements to diagnostics and service messaging for battery health, particularly in humid conditions

Bulletin number

661.40 (661.40)

Component

Fuel/propulsion system

Summary

• Improvements to diagnostics and service messaging for battery health, particularly in humid conditions. • Improvements to transmission diagnostics used for shifting. • Improvements to charging system diagnostics. • Fixes to help protect EV adapter from overheating while charging. • Reduces unnecessary service messages, check engine light activations, and OnStar calls from your vehicle.

Owners of these vehicles have filed 9 complaints in the fuel system category.