troubleshooting

Yesterday truck running fine, today check engine light on in morning and running fine and then all of sudden "stabilitrack off" light came on and began running very rough and had basically no power. had to limp home. any ideas? was there some sort of bulletin that came out for this model...

My driver and front passenger heated seats stopped working today. I'm looking for some potential troubleshooting tips to try and remedy the issue before giving my local GMC dealer $$$ to look into it. The heated seat lights on the control panel don't light, and the seats don't warm... I've...