It all depends on how often you lock/unlock your car as far as life goes.
, if you can and wouldn't mind, could you get the p/n for the actuator. I couldn't find it on AllDataDIY.com
and it would be nice to know once my warranty runs out as well as for these guys to know now. Once you guys get/find the part number, just head on over to GMPartsDirect.com
and see what the price is there.
For you guys that are looking to do it yourself, it looks like it is just push pin'd in. You should be able to see the back side of the actuator from the trunk by pulling back the carpet on the drivers side. Just follow the pull cord. You guys could also try lubing the actuator and working it.