Using EFI Live V2, I downloaded my stock tune and sent it to Guy to make a new dsp5 tune. He sent me the new tune and I tried to upload/flash the tune into the ECM. I keep getting Status: Unknown. I don't have this issue with the stock tune. On the Calibration tab of the new tune it shows LB7 for engine. I wonder if this is the problem since my engine is a LMM?

Guy took care of this issue.

Thanks Guy, I greatly appreciate all your help, and patience with a beginner (me).

What was it that you needed to do. May help someone out in the future.

Guy sent an email with the wrong tune :o:

Cheers
Cindy

Yesterday morning Guy sent me the custom tune for my truck, which is for the LMM engine. This morning I uploaded this tune with "zero" issues. Started my engine and noticed the check engine light was now off! Went for a drive and with about 3/4 throttle at 55, it hit 90 about as fast as I could respond and let off the throttle. It has much more power now with less throttle than before with full throttle. I installed a MBRP turbo back 4" SS exhaust earlier this week and that alone improved power and fuel mileage. About 2 weeks ago, I changed oil and used AMS oil synthetic and the fuel mileage improved about 1 mpg driving mixed rural and city. The new exhaust increased it further, of course. My fuel mileage driving rural and city before any changes was about 13.5 mpg with no DPF regenerating. Went to 14.5 mpg with the oil change, went to about 17 mpg with the new exhaust and I don't have enough miles to say what it goes to with the new tune.

Thanks Guy and EFILive!

Sounds good. Thanks for the update.