Question about 2001 Chevrolet Silverado 3500

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I lost spark on my 2001 chevy 3500 with the vortec 8.1 motor. what can i try?

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Go to and get a free wiring diagram by registering your truck. They also provide fusebox layouts. Some GM units use Relays for the Ignition.

You should be able to trace the power from the Ignition switch, through the Relay and out to the ECM. Then it is a matter of finding out where the power dies.

Now it takes a pulse to fire the spark and you should have a crankshaft sensor. Check your connections there.

Please rate my info.

Posted on Nov 08, 2012


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Posted on Jan 02, 2017

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SOURCE: hard to start chevy 350 vortec

You will need to do a fuel pump pressure leak-down test, the pump must not loose more than 5 PSI overnight, u will need a cheap fuel pressure test guage, the test port is on the fuel supply rail to the injectors on the intake manifold, it looks like a tire valve but metal with a plastic cap on it, u may be able to borrow this guage from Kragen, Autozone or a parts store like them, if not they are very cheap, less than $20 US. Run the engine with the test guage hooked up, turn off the engine and then check it in an hour or so, if it drops more than 5 PSI then u will need to replace the fuel pump in the gas tank. One note make sure the connection for the guage is tight with no leakage or the test is invalid

Posted on Jan 16, 2009

  • 4669 Answers

SOURCE: 98 chevy 1500 4.3L vortec misfire problem

These have a real problem with the distributor caps, i would try that

Posted on Mar 02, 2009

SOURCE: where is the #6 spark plug on a 5.3 liter vortec silverado 2000?

third back pass side the coil is probably bad if you have a miss code common problem

Posted on Jun 01, 2009

SOURCE: where is the thermostat located on a 2001 chevy

fallow the large house from the top of the radiator back to the engine, it will connect at a housing that is called a goose neck (because that is what it looks like) the goose neck housing will have two bolts in it. your thermostat will be behind the gooseneck.

Posted on Sep 30, 2009

  • 400 Answers

SOURCE: how to set timing for a 2001 chevy 3500 van

Which engine is in the Van?

Posted on Oct 26, 2009

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