FUEL What should the fuel pressure be in my 2002 GMC 2500HD

45 to 60 psi, running,,,,,if presure is low,, try changing the filter first, if it does not come up you will need a pump,,, its in the fuel tank

Replace the fuel filter, check out the fuel line pressure. Check for hidden codes. Fuel pump may be bad. Common GMC problem. Pump is located in the fuel tank.

Hi!!

The Fuel Pressure Regulator is screwed into the fuel injector rail and all you need is a 1/2 or 9/16 open wrench and unplug the electrical connection and the vacuum hose. If you already know that the regulator is defective, I suggest you buy the new one first so you know how it looks like.

check that the oil level is full and check to see if the low oil pressure switch has fallen off it's between the engine and firewall just below the distributor, als tun the ingtion key on and listen to see if you here the fuel pump come on for two seconds, if it does check fuel filter. if it does not check fuel pump relay and blowout prevention valve reset it if it's not allowing fuel to flow will bwe on same side of fill hose tank.

the fuel filters are in tank and not serviceable on most newer gmc trucks until the fuel pump dies

becarfull, the fuel filter os on the passenger side of the engine compartment. after replacing the fuel filter you need to prime the system to get all the air out of the fuel system otherwise the engine will crank and crank and never start. if this happens, you'll need how to prime the system or tow the truck to the nearest Gm dealership.
read the owners manual for help.

Check fuel pressure at injector rail. It should be at least 45psi.
If it is low replace fuel filter. If pressure is still low you will need a new fuel pump.
Dirt from the bottom of the fuel tank may have burned the pump or blocked filter.

6.0 to 8.1.. is this any help to you

the fuel gauge and fuel pump is one assembly in the fuel tank. You will need to drop the fuel tank. May be a loose connection or faulty sending unit

Requires a special fuel line removal tool available from most tool trucks Snap-on Mac