I've read these post bout resetting computer when you chip it, or exhaust,or putting a airraid system in. Would it make any difference to reset it if you buy a used truck? Different driving styles? I bought used with 39000mi and aint done no mods yet, just wondering if it would change anythig for the good? Also my tailgate handle feels like its hard to open? Almost like it wants to break. Is this common? Thanks for any input. >>>-ONE->