When I returned home I found that, in checking my air filter, your mechanics had neglected to tighten the air filter cover screws. They were completely loosened of and sticking up above the cover. In addition the cover was damaged as one corner of the cover flange was broken off, leaving only a partial hole for one of the flange screws. I will never bring my car into you for servicing again.
My new 218 Silverado was in for it's first oil change, multi-point Vehicle health check and a warranty issue with the A/C. Service was as usual very good. Staff were friendly and helpful.