To keep fuel systems clean, TOP TIER detergent gasoline is recommended. See Fuel (Gasoline).
If TOP TIER detergent gasoline is not available, one bottle of GM Fuel System Treatment Cleaner added to the fuel tank at every engine oil change, can help. GM Fuel System Treatment Cleaner is the only gasoline additive recommended by General Motors. It is available at your dealer.
Power Steering Control Module Calibration Steering Control
Steering Angle Sensor Centering and Software Endstop LearningWarning:An inaccurate or not centered steering angle sensor couldlimit the operation of the electric power steering-(EPS)and result in personal injury.Centering of the steering angle sensor and software endstop learning might be requiredaf ...