I'm thinking about getting my dad a nelson tune for christmas.
he's got an 04 denali with a maggy, swapped out flowmaster and hypertech. He's not really wanting any more performance out of it, but i figure what the hell. The biggest thing i would like to see changed was when his tranny went out a year or so ago he got it re-built and now it about breaks your neck every time it shifts, WOT or not, it doesn't matter.