2003 chevy 2500 H-D fuse box

Should be on the drivers side back by the hood hinge.some have a lightning bolt on them.flip the lid over and you should see a diagram of what fuse/relay control's what accessories.

For Chevy impala instrument panel fuse box location and diagram.Click the link below :----http://technoanswers.blogspot.in/2012/02/where-is-fuse-box-located-on-2003.html
-----------And for chevy impala under hood fuse box location and its diagram click the link below :----http://technoanswers.blogspot.in/2012/02/under-hood-fuse-box-diagram-for-2003.html

----------Check both the fuse box diagrams for better understanding.Thanks.

left side of dash fuse box near door or in the fuse/relay box under the hood

There are 2 one under the fuse box and one at the rear frame you may have of one or one of each

Under hood, Good luck .

It may be your horn fuse. It will be in one of your fuse boxes. Just follow your diagram on the fuse box lid.

check to see if you have power at the fuse/relay box under the hood. reise the lid off the fuse/relay box and look inside for correct location of the ignition start fuse and the relay. check with a testing light for power to fuse and relay. replace faulty fuses and relay.

Check the relay in the relay/fuse box under the hood. There should be a diagram either on top of the cover or under the cover to tell which relay it is just like your internal fuse box.

Check the voltage at the relay.If its 12v comming out then you have a wire problem.Replace the wire from the relay to the pump.Hope that was helpfull good luck.

There is no fuse specifically dedicated to the fuel pump on this year and model of Suburban. This Suburban is equipped with dual tanks and as such has two relay switches, primary and secondary, both of which are located at the main fuse box in the engine bay, that power up the respective fuel pumps.

The closest fuse (15A) controlling either of these relays also powers up the main control module (located beside and below the main fuse box). So, if one needs to disconnect the fuel pumps from functioning, then the only effective method is to disconnect the fuel pump relays.