Where is the 2004 Hummer H1 fuel pump relay located?

Four to five hours minimum.

some are believe it or not in the glove compartment.

Where is the relay fuel pump Hyundai h1 2005

The fuel/water seperator is located under the hood, driver's side, against the firewall. Black cap and 2 wires going to the bottom. The pump uses an optical sensor so yes, if there was fuel, it would really screw with the system. However, the PMD on these were problematic. This is the control module that is mounted to the side of the injector pump. They have a kit you can purchase to get it away from high heat and will comew with the harness and all to extend it. Would you like a 2003 shop manual for this?

Diesel fuel doesn't go bad like gasoline, at least not as fast. I've been around diesels in construction equipment and sometime a machine will sit for a couple years and still start right up. You have other problems. I don't know that much about the Hummer diesels but, Ford uses a high pressure oil pump to fire the injectors. The main oil pump supplies oil to the high pressure oil pump reservoir and then the high pressure pump supplies oil to the injectors. If Hummer uses a similar system the reservoir may have drained down and there is no oil for the high pressure pump to pump. Ford has plug where a person can fill that reservoir manualy if necessary. Maybe try cranking it some more, don't crank it more than 10-15 seconds at a time. Walk away from it for 10 minutes or so, then try again, make sure you let the glow plugs cycle. If it don't start after a half dozen tries, you may have to have a mechanic look at it. I'm sorry I can't be more help.

youre going to need to take it to either a hummer dealer or a reputable and trusted transmission shop. these are general motors transmissions and do not cost a lot to rebuild. the only difference in price is whether on this year you have the 350cid gas or 6.5 na motor. wish i had better news but remember that transmission is constantly trying to move 8500lbs. service every 15- 20,000 miles. let me know if further assistance is necessary. i am certified with am general.

disconnect harness to the pump and jump with test light, turn key on and the light should go on for a few seconds

by law all obd2 connecters are to be under the dash on the drivers side about center. maybe a a little left or right of the steering column

air getting in fuel supply system.or the injection pump is defective.idle speed could be too low.

it is very common to do so however as a h1 tech myself i do not recomend such. it was by design that these monsoon systems drown out some of the decibles created by the diesel engine. if you still decide to do so i can get my manual out of storage and tell you which one are which. email me at [email protected]