Hi I am new to this ,My question simply enough,I live in Medina OH,35 miles south of Cleveland,Oh..Where and who can I trust to perform general maintance on my Corvette.Oil change for one and I am slowly loosing air out of my rear tire.I believe the valve stem itself is the culprit.I wish I had the ability/space to get under the car myself.The area Chevy dealer I dont trust. The car is stored now with the battery tender on,only 26,000 miles on her.Thinking ahead to spring and cant wait.Any suggestions would be appreciated.