Memory Functions

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Battery voltage is supplied at all times to the memory function switch from the driver door lock/window switch that is located on the driver door panel. When a memory switch is pressed, a reduced voltage from a series of resistors is applied through the switch contacts and the memory recall switch signal circuit to the driver door lock/window switch. In response to the memory request, the door lock/window switch then sends a message to the memory seat module (MSM) via GMLAN serial data line indicating the memory request.

The current seat position may be recorded for 2 different drivers. Refer to the owners manual for memory recall settings.

When a memory recall button is pressed, a single beep is sounded in order to acknowledge the signal has been received. The MSM then moves the appropriate seat and lumbar motors until the position sensor feedback voltages equal the feedback voltages stored in memory for the identified driver. When the EXIT button is pressed, a single beep is sounded in order to acknowledge the signal. The MSM will then move the entire seat rearward from the current seat horizontal position.

Memory recall operation is disabled if the shift lever is out of NEUTRAL (N) or PARK (P). The memory seat module receives the transmission selector position data via the GMLAN Serial Data circuit.