GMC Troubleshooting Questions? Ask a Mechanic for Answers
When you did the timing chain, did you put the reluctor wheel back on after the timing chain, but before the timing cover?
Did you have the battery disconnected when you did the oil pan?
If you had disconnected the battery, the security system could be the reason for it not to start. Do you have a digital volt meter and a test light to do some testing?
Can you check the crank sensor plug and see if you have 12 volts on one of the wire to the sensor with the sensor unplugged and the ignition switch in the run position please.
The pink wire should have 12 volts to it.
See what you have and we can go to the next step. I really need to know what the voltage is before I can tell you what or where to go.
the tip of the sensor should not touch the reluctor wheel.
the reluctor wheel is much thinner than the tip of the sensor.
Can you check all the fuses in both fuse boxes with a test light and make sure they all have power on both sides of them with the ignition switch in the run position.
Till I have test results, all I can do is guess.
just come back to this chat screen and post the results and I will be back with you asap.
Are you saying that all the fuses in both fuse boxes have power on both sides?
Please tell me exactly how you tested them?
Remember that I am an expert and I know what the readings should be. Now please test all the fuses and tell me what fuses do not have power on both sides of the fuse, and what fuses only have power to one side please.