If it hasn't been done yet, take a few minutes to run the cam/crank correlation.
P0300 only when in tow/haul
- Thread starter shegarty
- Start date
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Do you know what menu item that is buried under?
Shoot, I don't recall. Probably under then engine Special Functions.
That’s what I figured. That’s next on the list then.
Awesome, thanks. Any tips on what is involved in the process? Do I need anything other than the Tech2?
Nope. I think it just needs to be warmed up first. Might cycle through the Tech 2 pages after what I posted to be sure before proceeding.
Similar: http://blog.obdii365.com/2020/07/08/gm-tech2-crankshaft-position-variation-learn/
I added a link to a similar procedure.
Been attempting to run the cam/crank correlation for two days now but I cannot seem to complete it. I am using a VCXNano to interface with the truck and Tech2win to talk to the ECM. I installed the setup as directed and it works fine as long as you are not accessing live data. In this situation it continually looses connection and wants to start the whole test procedure over again. I have tried reinstalling all the software to no avail - even tried a new cable between the unit and the laptop but no dice either.
If you have an aftermarket radio or remote starter / alarm you may have to pull those fuses. I know it works that way for programming modules.
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