Question about GMC Sierra 1500

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Hit a bump and truck quit. turns over but will not fire.

Fuel pressure seems a bit low but its still pumping

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First thing I would think of is something electrical became disconnected. Did you ground out? Easy to damage something, though manufacturers are of course aware of that, so they try not to place anything which would be susceptible to damage from bumps and especially grounding. How is the fuel filter and hose? usually easy to get at, and cheap to replace. Gasoline engines are more tolerant of lower fuel pressures compared to diesel which run at higher pressure, and that pressure is critical to allow the injectors to properly mist the fuel.

So get out your creeper and strong flashlight and start looking, then start checking EVERYTHING in the engine compartment, and finally connections inside, including fuses and relays.

And of course checking your OBD can often tell you the problems without even getting your hands dirty.

Posted on Dec 05, 2014

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Posted on Jan 02, 2017

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SOURCE: 2001 Dodge Ram 1500 Won't Start

Have you checked the codes?
Mine was a faulty coil.... Twice. I made a heat shield for the second one.

Posted on Sep 17, 2008

  • 1 Answer

SOURCE: 2000 chevy silverado 1500 4.3 eng

Chevy Trucks, Blazers, S10 pickup and the like will vapor lock ecspecially the 2000 models. Do not tighten the gas cap past 1 click. There is a tube that runs from the top of the tank down and this gets hot and collapses or burns in half. We just bought a reinforced rubber tube cut it to lengh and use it instead of part and it's worked grat for 2 years so far.

Posted on Feb 01, 2009

  • 140 Answers

SOURCE: where is the fuel pump and which relay goes to it? f150, 5.0 efi-

it is in the fuel tank.. drop the tank, remove little snap ring on top of tank, and pull the old fuel pump assembly out, then just replace the old one with the new one.. good luck keith...

Posted on Mar 21, 2009

  • 1 Answer

SOURCE: 87 CHEVY BLAZER, FUEL PUMP NOT GETTING POWER

It's your Electronic Control Module (ECM). There is a short in the computer. You're going to have to replace it. The same symptoms occurred in my vehicle, had a mobile mechanic come to my house and fix the problem. Quoted me $350 for parts (used) and labor.

Posted on Mar 24, 2009

  • 1201 Answers

SOURCE: my 2001 chevy silverado has no fuel pressure when

Try having the fuel pressure regulator checked, it's round in shape at the end of the fuel rail, and has a small vaccum line connected to it.
Also check that vaccum line to see what shape it's in, the littlest pin hole will cause a problem.

Posted on Aug 08, 2009

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