This board has given me a ton of useful info over the last year and I hope it comes thru again. I’m about to buy a 2011 Silverado 1500 from a family friend that has been siting in his garage for the past 6 years. Only has 9,800 miles and gets driven a couple times a year. I know absolutely nothing about cars... so is there anything that should be done on it since it’s been sitting for so long? Dumb question I know but I’ll gladly take any advice.