Oil and grease
To all those who have a less then 2 year old Chevy 4500 cutaway the first 2 years of service are free. Had my rv into local chevy dealer yesterday for oil and lube and was pleasantly surprised that the only additional charge I had was for the Mobil 1. Sure wish I knew that when I had my first service. Plus they fill all liquids scan for recalls and do complete check list.