Don't go the dealer, yet. Scan your truck for DTC codes. If you don't have a code reader, local parts store will read for you for free. Then react to the DTC that was found.
Lots of posts about TCS system problems on forums like this one and also Youtube. Could be any one of hundreds of problems.
2008 Silverado LT, CCLB, Edge Insight CTS
2009 Arctic Fox 29-5T, Silver Fox Edition, Onan 3600 LPG generator