The check engine light will not turn off

Asked by May 13, 2017 at 11:30 PM about the 2004 Chevrolet Silverado 1500 Z71 Ext Cab Short Bed 4WD

Question type: Maintenance & Repair

I recently installed both knock sensors and harness on my 2004 Silverado
because I was getting a code that indicated that these were defective. But
after replacing them, I still getting the same code. I already rechecked the
wiring all the way to the computer and found everything to be ok. I don't know
what else to do, could it be a timing issue? I did replace the 5.3 with a 6.0 but I
I think the issue was there before I replaced the engine.

3 Answers

251,515

A lot of times, the code that pops up indicating which sensor is detecting the problem is not the issue. You need to do further diagnostic work. So what are the 4 digit code or codes you have now?

1 of 1 people found this helpful.

Thanks Tom.... I have attached a photo with the codes that I am getting. I do plan on running some more test to the best of my unprofessional experience. I have also checked all of the grounding points that I have found. Hopefully you have some more tips, if not I will have to take it in to the dealership and suffer the expense. Thanks Tom

251,515

https://www.youtube.com/watch?v=oPd6oPxlc3A

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