Unfortunately my truck had been slow to start and then wouldn���t start after a few days of noticing this problem. I jumped started and then called COURTESY GMC Service Advisor and they said I could drive my pickup to shop now to check out to see if batteries were bad or something else causing the batteries to go down. I arrived at noon and by 2:00 PM Service Advisor called me to let me know both batteries were bad. Gave me a quote to install two new batteries and I told to install. Job was completed by 3:15 PM and I was on my way home.