GM Service Manual Online
For 1990-2009 cars only

The CTSY LP fuse 8 and CKT 40 (ORN) supply voltage at all times to the universal garage door opener (UGDO) Module. The following components provide the UGDO module ground path:

    • CKT 1850 (PPL/YEL) or CKT 1850 (BLK)
    • G202

The body control module (BCM) on CKT 1382 (PPL/WHT) provides backlighting.