That I'm aware of?? No. It's a 2003 cutaway box truck so its doubtful and the shop where I've been taken (no..it's not a typo) would probably have noticed and they've not mentioned it. Although, with fuel prices so high and the preformance so low I've been thinking of some mods along those lines, but not sure that would be best until whatever is wrong with this thing is fixed..afraid that mods might make it worse..and, at the time I can't afford it. Is there a quick way for them to check if any "tunes" have been uploaded? Greg said they tried several times to "flash" the PCM but it wouldn't hold.