Question about 2000 GMC Jimmy

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I got a 2000 gmc Jimmy no start, no spark and diagnostic computer says no link or communication from pcm. Any ideas? I did check all the fuses and the wiring to the distributor, crank sensor, ignition module and fuel pump.

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If vehicle has been submerged, PCM is likely dead. If vehicle has been struck by lightning, PCM could be locked up or dead. Assuming none of these has happened:
Check power to PCM, not just fuses. You can check through the backside of the connectors ON the PCM.
Check connectors on PCM.
Check ground to PCM.
Make sure you've had no rodent activity on vehicle wiring.
Reset PCM by disconnecting battery (+) lead, waiting 15 seconds, then grounding battery (+) to battery (-) lead. Reconnect battery (+) lead to battery. All user memory sets such as radio and seat settings will be lost.
With no output from PCM, after resetting, the highest probability is dead PCM. It's rare, but it happens.

Posted on Nov 11, 2014

  • greggroten Nov 14, 2014

    Thanks Steve, yeah that was the first thought of rodent activity cause it ran fine till it was parked for about 4 months. Just can't find anything chewed yet though.


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  • 42 Answers

Check the pcm battery fuse.

Posted on Nov 10, 2014


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SOURCE: 2000 Silverado-4.3 ltre-cranks over-wont start-consistenly

Yes. First, in the fuse block under the hood check INJ A fuse and INJ B fuse. INJ A fuse is circuit 1039 which feeds the coil. If the fuse is OK, replace the coil electrical connector. I stock 2 of these at my dealership because they are needed quite often.
FYI P1351 is an ignition coil control circuit DTC.

Posted on Sep 01, 2009

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SOURCE: 2000 GMC Jimmy

Check your fuel regulator on also check your injectors - if you have a CSFI injection system you may want to replace it with a MFI upgrade kit. Trust me. - CSFI sucks

Posted on Feb 13, 2010

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SOURCE: Not starting. No spark. Crank angle sensor?

you my also have a selenoid problem,may sit on passenger side fenderwall.

Posted on Mar 13, 2010

  • 1 Answer

SOURCE: no spark

Inside the distributor cap under the rotor is the camshaft sensor with a 4-wire plug. You have to bump the engine over with until a notch in the mount for the rotor lines up with the sensor. Just two bolts retain in, T20 Torx I believe.

Posted on Mar 19, 2013

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