1990 Sierra, runs fine then just dies and will not start till pri

SOURCE: 1996 GMC Sierra 1500 truck fuel problem

Have you check the injector relay or maybe a fuse for injectors.

SOURCE: my fuel filter will not prime on a 6.2 diesel what could I have done wrong

hi from the uk if your vehicle is equiped with a manual fuel primer device? and unable to prime f i pump ? no fuel at f i p are you trying to prime with the ignition on ? as the fuel shut off solenoid that is fitted to f i p is elec/ignition on activated so fuel can then be primed into the f i p and then to assist starting just loosen a couple of injectors delivery pipes while turning engine over then retighten the stop solenoid is liken to a temp sender unit ? and is normally located at the top of f i p adjacent to fuel inj pipe connections solenoid has a wire attached to activate fuel valve in solenoid allowing fuel flow and ign off shuts fuel supply if you operate on/off with key ign you can hear click if working? but better test is by volt meter to test if ign supply ok? if you have merely ran out of fuel or just changed filter ? then provided no air leaks on supply fro tank the above should get you started ? come back if you have more info/update? hope and wish you good luck

SOURCE: 1999 Yukon cold start problems.

1999 Yukon Start Issue - I have replaced the octopuse, battery, fuel filter, fuel pump, still having problems starting in cold weather, sometimes after a heavy rain.

Any suggestions?

Thanks

SOURCE: 1997 jimmy 4.3 liter hard start. Have to prime throttle body when

could be your battery is getting old they tend to lose performance in colder weather.

SOURCE: Have a 98 gmc 5.7 truck have to prime to start truck.

Sounds to me like either your pressure regulator is bad or you have a loose fitting somewhere in the fuel line from the fuel pump to the engine. When you turn your key to the on position, you should hear the whine of the fuel pump until it builds pressure. When you shut the truck off the pressure regulator should retain the pressure for a certain amount of time but if it don't close then air is allowed into the fuel line and the fuel drains down to fuel line away from the engine. Next time you try and start the truck after it has sat for a while try turning the key on until you hear the fuel pump whine shut off, then repeat it 3-5 times and then try to start it. Basically that is running the pump enough to get the fuel back up to the injectors. Check for loose fittings in the fuel line, or cracks in the fuel line and if all that is fine then replace the regulator.

Hope that helps

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