GM Service Manual Online
For 1990-2009 cars only

DRIVER DOOR AJAR

The driver door module (DDM) receives a discrete input from the driver ajar switch. The DIC receives the status of the driver door from the driver door module (DDM) via class 2 serial data message. When the driver door is open and the vehicle is out of the PARK gear, the DIC displays the message.

PASSENGER DOOR AJAR

The passenger door module (PDM) receives a discrete input from the passenger ajar switch and sends the status to the driver door module (DDM) via the power door serial data circuit. The DIC receives the status of the passenger door from the driver door module (DDM) via class 2 serial data message. When the passenger door is open and the vehicle is out of the PARK gear, the DIC displays the message.

LEFT REAR DOOR AJAR

The LH rear door module (LRDM) receives a discrete input from the left rear ajar switch and sends the status to the driver door module (DDM) via the power door serial data circuit. The DIC receives the status of the LH rear door from the driver door module (DDM) via class 2 serial data message. When the LH rear door is open and the vehicle is out of the PARK gear, the DIC displays the message.

RIGHT REAR DOOR AJAR

The RH rear door module (RRDM) receives a discrete input from the RH rear ajar switch and sends the status to the driver door module (DDM) via the power door serial data circuit. The DIC receives the status of the RH rear door from the driver door module (DDM) via class 2 serial data message. When the RH rear door is open and the vehicle is out of the PARK gear, the DIC displays the message.