My keys got stolen not too long ago. I was able to replace the steering wheel key lock cylinder by pulling the wheel off. But how do I get to the key lock cylinder to the hatch in the back?

 

You have to remove the plastic panel in the back.From there look behind the hatch motor/latch.You should see the lock cylinder with a clip holding it in place.remove that clip at the lock should pull off.If you've ever looked/removed the lock on the door.There is a similar clip holding it on.

 

Take the money you would have spent paying for a service and buy some tools. Invest in yourself.

 

Exactly! In my circle of friends, I am the one who knows how to do the"odd" stuff. Picking locks, re-pinning locks, upholstery, electrical, woodworking, welding, auto body, etc. Broaden your mind. I found it much harder to re-key my ignition switch, than the trunk lock. Plus, if your keys were stolen, then someone has keys to your car.
DR.K.