I just wanted to throw this out there because I couldn't find anybody prior that had done this CP3 conversion already, but I bought the S&S diesel 50 state legal (emissions intact/no tuning required) CP3 conversion for my 2013 LML. I've got about 88,000 miles on my truck and my CP4 was still working fine, I just wanted the extra reliability of a CP3. I have not put a ton of miles on the truck (about 1K since install) but so far I've had no issues at all and it was completely plug and play. I did have a shop do the install, Interstate Diesel Performance here in Utah, great place to go with very fair labor rates and quality work. All said and done I was about $3,500 out the door and most of that is the $2,500 conversion kit w/pump and yes that is a good chunk of change but its only about a third of what it can cost if your CP4 goes. I hope this helps anybody who has been on the fence about this particular conversion kit and pump.