This is the differential lock control valve for 2004-2009 GMC Topkick T6500, T7500, T8500, and 2004-2009 Chevrolet Kodiak T6500, T7500, and T8500 trucks. This item mounts on the frame near the rear end differential on these vehicles. This is the control valve for locking and unlocking the rear differential on these trucks. Replace you old, faulty, damaged, or non working control valve with this brand new factory original part from General Motors at a fraction of the dealer price.

New. Never Installed. OEM Part. Bulk Overstock

GM Part # 15296484 (number on the item)

Alternate GM part # 15186704

Item is number 1 in the GM diagram