I have an 2013 Suburban LTZ, which gives me wrong live data while running. I show zero rpm , also -40 on all temp readings. I have checked my code machine on many other vehicles, all read right. So I know it is the suburban. This vehicle had it ECU and BCM changed at an GM dealership. This vehicle is running fine, but are the values showing up wrong. The crank sensor is reading right at 600 rpm.