I have a 2006 4x4 Trailblazer Ext (L6 Engine). I cant really give you a specific time on how long this will last. It just comes and goes. The trunk will be working when I leave from home and then I go to town then i can get grocery or dog food in the trunk and then when I come home the trunk won't open. Sometimes the keyless entry button won't work and the bass in my car will come and go to. I can tell when the trunk will open because i can hear the bass in my car work better. It's very strange.. thanks for helping me..