The tilt/telescoping steering column has a 4-range switch for steering wheel position adjustment, telescope when in and out, tilt when up and down. Steering column position may change as the following steps:

Manual controls the tilt/telescope switch, instrument panel module receives input signals. Press the control switch and sends signals to instrument panel module. Instrument panel module receives signals, then sends GMLAN messages to the driver position module (DPM), activates associated steering column drive motor.

Tilt/telescoping motor may run in the forward or reverse direction. For example, the tilt motor can make the steering column move up and down. When DPM receives the signal of raising up the column, DPM will supply battery positive voltage and ground to the tilt motor, and make column move upward. When DPM receives the signal of lower column, DPM will supply battery positive voltage and ground to the same motor with the opposite polarity. When the polarity of the applied voltage is reverse, motor run in the opposite direction to lower column.

DPM store the steering column position, and make steering column return to the position in memory with 2 position sensors. DPM supplys 5 volt reference and ground to the tilt motor position sensor and the telescope motor position sensor. The voltage of the sensor feedback circuit is 0.25-4.75 volts. Each sensor is installed to the appropriate motor cable assembly separately. When motor rotates cable, the sensor resistance change. DPM monitors the feedback voltage to determine the column position via a tilt telescope position sensor input circuit. After storing the input and output position, DPM will store the column position by recording the feedback voltage from each position sensor. When input or output positions are needed, the module will move the motor and the feedback voltages from each position sensor and stored in memory are equal.

Personalization of memory settings and the steering wheel position can be obtained by the tilt telescope steering column. The stored data includes input position and output position. Input position is the steering column when ignition switch is in the ON position. Output position is the steering column position when ignition switch is in the OFF position and the drivers side door is open.

Initial store settings of the DPM is completed in the assembly plant. The settings can be changed when buying or at any time, in order to suit customer preferences.

DPM stores personalization information. Radio is used to turn on or turn off the personalization features in DPM. Send GMLAN information to DPM by radio, set DPM to turn on personalization until the features are turned off with the DIC again.

Steering column control module may store 6 possible positions. 3 input positions and 3 output positions.

If open the door by remote controller, EKM can make driver open the door by using the key. DPM receives a GMLAN messages from EKM.

The energy absorbing and locking steering column includes 3 important features in addition to the steering function.

1. The steering column is energy absorbing and is designed to compress in a front-end collision which will lessen the chance of injury to the driver.
2. The steering column has a tilt/telescoping control system that consists of a steering column power assembly, position motor, sensor and a steering column control switch.
3. The multifunction lever provides for the control of the headlamp high beams, and the windshield washer and wiper.