re: .

Call the general mgr.They dont like bad press.In 2011 they had my truck(2006 Chevy CC Z71) for 2.5 weeks for what turned out to be a bad electrical connector.The "tech" at All Star North replaced both cats,2 knock sensors and a computer to the tune of $2983.00
I paid it because it was "fixed" and went on my way.It did the same thing 15 miles down the road and had to ride the roll back.
I called the GM and he had the truck sent to the store on Sherwood where they found a corroded connector on the PCM and a bad injector.That cost right at 450.He didnt have to but he refunded me $2500.They kinda have you by the short hairs when you drop your vehicle off.