I know this has been addressed,but I think it should be here to be found for future lifters.
After you lift the truck using smaxx or markmc kit, if there is a squeak it could be coming form the washer right at the top of the strut tower. This is easily remedied by running a bead of white lithium grease around it.
At least that what worked for me and I am so much happier without any squeaks.