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View Full Version : Code P062F and Code P0633 Help


Airtime
September 26th, 2009, 11:14 AM
Cannot start my truck and getting two codes P062F and Code P0633

What should I do?

I tried to upload and new tune with no luck. It shows the tune took but still will not turn over and still shows codes.

Help
Airtime
September 26th, 2009, 06:01 PM
Maybe I should order a back up ECM? What is a good place to buy one?
GMPX
September 27th, 2009, 11:07 AM
Is this a 2001 model by chance?
Has been a problem on 2001's from the day they came out.
If you want to try another ECM see this thread:
http://forum.efilive.com/showthread.php?t=11325

Also see if you can get an updated OS put in it (I'm still assuming this is a 2001 truck).
Airtime
September 27th, 2009, 11:58 AM
Its a 2008 GMC LMM.

Thanks
GMPX
September 27th, 2009, 03:54 PM
Oh, that changes things. You need to get the ECM updated by the dealer, it's a known fault with the LMM. If your ECM OS is not 12628594 then that is the problem.
ScarabEpic22
September 27th, 2009, 08:09 PM
Since he has already locked his V2 to his ECM, any way he can just flash it with someone elses 8594 OS and bypass the dealer? But then you get into the whole CVN dealeo.
GMPX
September 28th, 2009, 12:57 AM
Not quite, there is slight variances with each model truck, if he knows someone with the same model and options that has the updated OS, then no problem.
It should still be a warranty issue though.

http://duramaxdiesels.com/forum/showthread.php?t=5079