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It depends if it is a classic or new style Silverado. Both were made in 2007. If it is a classic Silveradothere is a replaceable relay in the under hood fuse block. If it is a new style Silverado the horn relay is part of the printed circuit board that is only available with UBEC (under hood bussed electrical center).
It's in betweenthe inner fender and the fender itself. You have to take the front of the inner fender loose to find it. Your fuse or horn relay may be bad. relays are interchangable.
Hi Kate: According wth the Silverado Owners Manual, the HORN fuse is located "underhood electrical center" that its located on the drivers side of the engine compartment near the battery. Lift the cover for access to the fuse relay block...
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did you check the horn relay it is a small box usually in or near the fuses or near the horn itself It may have been just the relay all along and not the horn
fuel filter? how about power to the fuel pump,loose ground wire to chasis? wiring harness? terminals clean at point of connection?did you check the fuel pump relay? Relay is located in electrical center under the hood on the driver side.relay and fuse legend will be on bottom side of cover, you sould be able to switch with another relay that you know works, ie: switch horn relay with fuel pump relay, honk horn to insure both relays are working when either relay is inserted into horn slot. Do you by chance have the electrical schematic drawing for the fuel pump?
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