In 2015 I was offered $15,500 for my 2005 Chevy 2500hd 4wd LT, 130,000 miles. Leather Interior was perfect and outside was perfect other then a smaller dent by rear bumper. I had a 3" lift with 18"wheels and 34" tires.
Needless to say, I sold it personally for $23,000 to the first person that looked at it.
Honestly, for a lot of people and a lot of dealers, the tuner hurts the value immensely. If yours is only 2wd, I doubt that a dealer would give $12,000 but I could be off. 2wd HD trucks dont sell around here in Oklahoma very well
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