Just looking for some advice. I know the owner of this fully loaded Yukon. It has the bad engine and would need a new/used engine installed. My question is should I do this. I've read that you can plug in $200 chip that will keep the engine in V8 mode and will disable the AFM. I don't do much driving so having a big ride would be nice for the little driving I do. I'm told a used engine installed would be about 3-4k parts labor. I can probabaly get the Yukon for about $1500. Thoughts? Advice? Thanks!!!