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Re: Leakage in the rear hatch what causes this problem???
There are multiple gm technical service bulletins regarding water leaks in these vehicles. i suggest taking it to your dealer to be checked out, as some of the repairs are recalls / under extended warranty.
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It sounds you have a problem with a vacuum activated mechanism. I would check connections and vacuum hoses for leakage. If they are OK, you may have a problem with the mechanism itself.
Rear hatch is locked or unlocked with a key. (if equipped) • To open the rear hatch, insert the key into the lock, turn it to the unlock position and pull up the rear hatch by pressing the handle (DOOR). You can also lock/unlock the latch (but not release it) with the central door lock system. • If unlocked, the rear hatch can be opened by pressing the handle (DOOR) and pulling the hatch up. • To close the rear hatch, lower and push down the rear hatch firmly. Make sure that the rear hatch is securely latched.
There is no lever or any key hole it is a fully electric operated power latch. As to the cause the park brake must be engaged and the car in park gear position before the hatch will open, is it?
For water leaking inside the rear door panel, I'll suggest you check and replace the black rubber/foamy seal that is part of the high-mounted-rear light assembly.
It gets weak over time and soaks water, thereby allowing water seep into the booth lining and also into the underlay of the carpet.
If you have a cracked rear-light (the one attached to the boot hatch), you may also get a leak.
Change this rubber seal/ gasket. I used an old rubber carpet to make a gasket to fit the light assembly, and it stopped the leakage.
Hope this helps.
take the rear pannel off inside the rear door. more than likely a small plastic clips on a accuating rod is broke or motor doesnt function exactly the way its suppose to. also try spraying moving parts with wd-40 and keep trying may jus be sticky from dust/dirty
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