2016 GMC YUKON PROBLEM

[Erin Moreno]

LAST WEEK MY AC WENT OUT AD THEY SAID IT WAS THE COMPRESSOR...THANK GOD I HAD A SPECIAL WARRANTY AND IT COVERED IT.  WELL I TOOK IT IN WEDNESDAY MORNING TO GET IT REPLACED AND PICKED IT UP THAT AFTERNOON.  WHEN I DROVE THE CAR THAT EVENING THE ENGINE LIGHT CAME ON NOW.  I TOOK IT BACK TO SEE IF THEY DID SOMETHING WRONG WHILE THEY REPLACED THE AC.  APPARENTLY NOW THERE IS SOMETHING WRONG WITH THE ENGINE.  HONESTLY THIS DOESNT LOOK RIGHT.  IT COMES ON AFTER A COUPLE OF HOURS I LEAVE THE DEALERSHIPP.  I HAVE 50340 MILES ON IT.  I KNOW I STILL QUALIFY UNDER THE POWERTRAIN WARRANTY BUT IDK WHAT IT COULD BE.  ANYBODY HAVE ANY IDEAS?  ALSO IF THEY DO A DIAGNOSTIC TEST DOES THAT CHECK THE WHOLE CAR OR JUST WHERE THEY NEED TO CHECK?

[Russ Swift]

https://www.autoselectonline.com/article/is-your-check-engine-light-on-what-does-that-really-mean