Thread: GMC wont start
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Old 03-25-2019, 09:21 AM
Tech II Tech II is offline
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Re: GMC wont start

When ever you replace a crank sensor, you need to have a procedure done......this is called crankshaft variation relearn.....unfortunately, you need a scan tool, like the GM Tech II scan tool, to do this......

I am surprised that you have no codes set......

But first thing you should do is remove the coil wire from the distributor and attach a spark tester.......that way we know if you have spark......

If you have a good spark, then reattach the coil wire and see if you have the same spark, at the ends of several of the plug wires with the spark tester.....if weak or no spark, it's possible the distributor was not installed correctly,,,,did you do this yourself?

If you had no spark from the coil wire, then we have to check the EICM, or the control module for the coil.....either that is not triggering the coil to spark, or it is not getting a trigger signal from the VCM, your vehicle's computer........
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