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Its a 2008 GMC LMM.

Thanks

Maybe I should order a back up ECM? What is a good place to buy one?

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...

Went to start my truck this AM and will not turn over.

My code says P062F and P0633.

tried to clear codes but will not.

So I flashed my ECM and still have codes.

If anyone knows how...

Ok so its been almost a year with no DPF and the only code I keep getting is P041D.

The code only goes on in above #2000 feet sea level. Every trip I take up into the mtns the code comes on.
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