Rear lift gate not locking on 2006 Chevrolet Suburban 1500

Could it be simple or should I go with the "replace back lift gate assembly? for my entire paycheck?

-I'm feeling that I'm being taken to the cleaners prematurely.

How can I know if its just the actuator or something simple?

1 answer 3 comments
Go to another shop for a full scan and actuator test!... DO NOT believe that BS about replacing the gate!!!!
thank you..
Turns out that the glass window is also not locking along with the rear hatch. I'm going to have to purchase a repair book for the Suburban so I can plan to fix some of these things myself.