This bulletin applies to 2015-2017 Cadillac Escalade vehicles. Some customers may comment about a temporary loss of electric power steering assist (EPS) followed by a sudden return of EPS assist, particularly during low-speed turning maneuvers. The loss and sudden return of EPS assist typically happens within a 1-second period and is caused by an electrical/software issue.
This may be due to a sudden loss of voltage to the EPS system, where the EPS turns off and then back on as the voltage returns when the EPS load is removed.
To prevent the sudden loss of assist, a revised EPS module software has been developed to reduce the severity of the toggling event. Re-program the power steering control module.
Note: Do not attempt to order the calibration number from GM Customer care and Aftersales. The calibration number required for this service procedure is programmed into control modules via a Multiple Diagnostic Interface (MDI) with the calibration update. If you cannot access the calibration, call the Techline Customer Support Center and it will be provided.