RDELFLEET

So I'm having the same issues with (3) 2018 2500hd's and (1) 2015 in my fleet. Yesterday 1 went metal to metal in 11,364 miles the other in 13,472 and both on the Left front inner pad. After inspecting & Lu ricating the caliper slides & replacing the rotors and pads I noticed the left side(drivers side) seems to hang up slighlty more than the other side. I test drove it and broke in the pads to the rotors gently then turned it over to be driven by its user. Later that day he informed me of an intermittent squeek from the drivers side. I used my laser infrared temperature gun and I immediately noticed a 100 degree difference from left to right. 467 left. 359 right. I dont know why yet but I am thinking GM is aware that something wrong as I dont think im alone on this. If I figure it out soon I will be sure to share. If anyone is experiencing the same please share any findings.