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Home >> GMC >> 1999 >> Yukon Base, 4WD >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Remote Keyless Entry Systems >> Description & Operation (Standard Keyless Entry System) >> Standard Keyless Entry System Circuit Description >> Cargo Door Unlock
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Cargo Door Unlock

When the rear unlock button is depressed twice, the remote control door lock receiver sends a voltage signal through CKT 56 (BLK/WHT) to the cargo door lock motor. See WIRING DIAGRAMS  . Since CKT 295 (GRY) grounds through the door lock relay to CKT 150 (BLK) to G202, the cargo door lock motor unlocks.