Question about 1989 GMC K1500
If you have good fuel pressure, then i'ld lean towards the Ignition Control Module (ICM) it's around $40.00 at Auto Zone. They work when there still cold and when they heat up, they start to fail till they cool down again and eventually they fail totally. Auto Zone will have the step by step instruction to getting the job done. The ICM is under the rotor in the distributor, and the wires may also be corroded or broken. Inspect for any damages to the wire harness in the distributor before installing the new ICM. Good luck and hope this helps.
Posted on Jun 25, 2009
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Posted on Jan 02, 2017
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