2008 gmc sierra 5.3 off road package 4 X 4

[ATVGMC08]

Okay the truck has 56,000 miles And I'm getting a clicking everytime I turn the key on It's coming from underneath the truck about the center underneath it clicks when I turn the key on any clicks when I turn the key off sounds like a servo of some sort

 

[ATVGMC08]

clicking when turning key on and off

2008 gmc sierra 1500 I'm getting a clicking noise when I turn the key on and off seems to be coming from under the truck in the middle center of the truck almost sounds like a servo of some sort