Where is the fuel pump relay in a GMC Sierra 1500?
Where is the fuel pump relay in a GMC Sierra 1500? The control module under the truck box took the place of the fuel pump relay or fuel pump regulator. It is a 5"×5" flat box about 1/2 in. Thick bolted up under the box. Remove spare tire to get to it. 9 people found this helpful. Remember: There is nothing in the fuse box marked [Fuel Pump] location. Where is the fuse for the fuel pump? Were is the fuse and relay located if not in the box 23 people found this helpful. The fuel pump relay has no...