2018 silverado 1500 Issue with rear turn signals after battery replacement

[hotweather1968]

I replaced the battery in my 2018 Chevrolet Silverado this morning. Once I got it all back together, there were no issues that were apparent, then I got in and drove off. When I reached the first part of my drive where I needed to use my blinker, it came on like normal, flashed about 3 times and then started rapidly blinking and gave me a "rear turn signal failure" message. It did the same for both left and right side. The blinkers were both working when I got out and checked, but they were flashing rapidly. 

What in the world could have happened just from changing the battery? Any help or ideas is appreciated, thanks in advance!

[Will Gentry]

 had the same thing happen to me I hooked up the pos and neg on battery before the plug on the distribution block. unhook the battery cables and the plug the connector in then put the cables back on.

 

Edited October 9, 2022 by Will Gentry