Question about 2000 GMC Sierra 3500

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Starting I was going down the road,the truck just losted power, the gauges all read right then it wouldn't start. I have had problems with the module under the distributer, or would it be the fuel pump?

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  • worsty1 Feb 04, 2009

    You want to check the ignition module mounted just off to the side of the Distributor or the CAM position sensor located at the front, bottom of the engine. The sensor should have 2 wires and is just behind the large belt wheel of the crank shaft (it almost looks like it is part of the seal for the crank).
    The ignition module is expensive and would suggest the position sensor first. Your vehicle might have two sensor. First, re-seat the plug and if that does not work ohm out the sensor with a multi-meter. The sensor is a magnetic pickup and when the engine is running it pulses with a voltage. With the engine stopped, you should read some resistance or ohm's. If your meter reads "000" or open then the sensor is bad. Replace. It should have a short (1 Ohm) or higher resistance, maybe a few K-Ohms (1-9000 Ohms). Hope this helps.

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I would do a fuel pressure test just for piece of mind if anything. You know the auto parts store can chk. that maduel for you to, you just have to take it to them, and while your there you can rent a fuel pressure tester, and pick up a new fuel filter. I know autozone does all that, but i am sure they all do. They also can tell you what the correct fuel pressure is for your truck. that way you know if its not enought pressure it won't run.

Posted on Feb 04, 2009

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