I have Co-pilot 8 also, but I'm not sure if there is a setting. But, I know there is also a Truckers version which I suspect has a diesel setting I bet. I will look into my Laptop 8 and see what I can come up with.
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'06 GMC C5500 MDT
'06 Ford F350 PSD Dually
'19 Open Range 374BHS
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