Why does not back door open on my buick enclave

According to Wikipedia, 2009 to 2013 are the same transmissions

In its first year of production, the Enclave was often criticized for its 6-speed transmission, which was "hesitant to downshift."[7] For 2009, though, the powertrain is regarded as more competent with more abundant torque. For its entire production, it has been regarded as too heavy, weighing nearly 5,000 pounds (2,300 kg) with all-wheel-drive. Buick's VentiPorts have reappeared at the Enclave's introduction, a styling feature unique to Buick dating back to 1949.
Initial sales of the Enclave have been very strong, with demand far exceeding production capacity, forcing GM to add a third shift to the Delta Township plant.
With the arrival of the Buick Envision (which is slotted between the Enclave and Buick Encore) to North America in 2016 (for the 2017 model year), the Enclave will be bigger after Envision's debut, and the 2017 model year Enclave will be the last under the first generation platform.

Buick Enclave No Start Problems - Car Forums at Edmunds.com

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Mar 1, 2009 - 31 posts - ‎13 authors
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www.enclaveforum.net > ... > Recalls, TSBs, FAQs, Links & How To's

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Hi, It is possible the lock release mechanism is beginning to fail. Have someone push on the door in the closed direction while another person pushes the button. If that opens it you can try lubricating the mechanism and retry to see what happens.

something is broke where motor connect to door

The dome light is on a separate fuse since the dome light is one of the few lights that are connected to the battery even if the key is off.

There are usually two relay/fuse boxes

One under the hood on the drivers side near the firewall.
The other place is under the dash to the left of the drivers knee.
Hope this helps.

Is there clicking sound while trying to open hatch? If so, check the rod, otherwise problem with fuse/wiring.

passege door removal on ur Buick Enclave can be tricker than it seems. i would suggest to consult a dealer.

it may be under the back seat,,buick notorious with that..

Did you check the fuses? Under the dash and under the hood!

Yes? The thing about the Enclave/Acadia/Outlook triplets is that they are all great, but that second row is very uncomfortable. My friend was going to get the Enclave (amazing interior), but went with the Mazda CX-9 instead.