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tbrduc747,

Thanks for the reply!!
My delivery date as well was January 2006, and I also had the glow plug reflash, but the O.S never changed. When I look at O.S upgrade tab it...

I have a 2006 LBZ operating system 12604138, and I don't have the option to adjust fuel gauge and tank volume. Is there a way to get around this weather it be replacing the PCM or full reflash to...

The cal. files are available for the late operating system LBZ, but the early operating systems don't have that option.
I did the change on a couple of the late systems, but of course my...