My 2014 did the gauge pegged down & high fan ****** less than a year ago - new temp sensor fixed it then ...... but has recently started this same scenario again now. Sometimes the only permanent fix for these type issues is a new owner !!!!!
I’ve had nothing but electrical issues with this POS the last 3 years - electric rack n piñon went out (stupid stupid high $$ to fix that) then the doors wouldn’t stay looked (BCM & programming bullshit) I’m about done with it & GM’s period