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I have a 1999 chevy suburban c1500 4wd, the other day while my husband was driving it died. Checked it and it was out of oil. After filling with oil, ran fine for a day. Went to start the next morn and just turned over but wouldn't start. Got it to start after a while of pumping the gas, now this morning it won't start again. Checked the fuel pump and oil are fine.
If it has a vortech V8 It has to have the right fuel PSI or it won't start. Also pick up in distributor could be causeing problem. Cross over style distributor cap also can cause problem. Out of oil? Fuel pressure regulator where found inside the intake manifold with injector cluster, if fuel psi regulator goes bad could be leaking fuel in intake causing oil to get deluted and burn.
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Check the wire harness on the transfer case to make sure it's still plugged in. Check the selector switch in the dash. Check the hub sensor wire harnesses on the front wheels. Check for error codes through OBD-II connector under the dash. Good luck.
I suspect you have had an oil pump failure. To get at the rotory gear oil pump you will have to drop the oil pan. After you take the pan off, ( having drained the oil the oil pump is what the oil pick up line leads into. That pick up assy. is a round shaped disc with a screen inside it. Clean the screen first then the oil pump. Install new oil pan gasket on reassembly. Hope that helps you. Please let me know.
Hopefully the engine was not damaged when the pump broke. If it was you may need a complete engine rebuild, MAYBE.
The fuel pump on that model runs through the oil pressure switch so that if the truck looses oil pressure,It kills power to the fuel pump to prevent engine damage.you need to find the cause of the low oil pressure reading(possibly a bad oil switch).That would be the cheapest place to start,or have it checked with a mechanical gauge.Good luck, ChevRev
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