Do you loose the cluster or anything else like that.
Have autozone or someone do a load test on the battery and check the connections.
My 07 had an issue when the battery was going out where I lost my cluster, power windows, wipers and some lights i believe. Truck ran fine and I was perplexed as to what was wrong. Battery was starting the truck ok but swelled and went out one day without warning, the issues described never came back after that.
2016 CC LB 2.8L Duramax Diesel
The Original (Sold June 2016)
2007 4x4 Z71 3.7 I-5
Hunter Brush Guard
Access Lorado Rollup Tonneau
Window In-Channel Vents
DDM Tuning 55w 5000k HID
Fosgate Punch 10" Sub w. Custom Box.