Smokes when in idle and take off

Hi, this is Bo, an auto expert on RepairPal's Car Genius team! White smoke at idle and on take-off in your 2015 Silverado 1500 could point to coolant sneaking into the combustion chamber—most likely a head gasket issue. When you're idling, the leak might build up, and when you hit the gas, it burns off in a big cloud. Since it doesn't smoke while driving, it's probably a smaller leak, but left unchecked, it could get worse. You’ll want to check your coolant level and maybe get a pressure test or compression test done to confirm if the gasket is to blame. If you need any further advice or want help finding a trusted RepairPal shop in your area, please feel free to call us at 877-913-1554.