There are well documented sets of procedures for fixing squeaky seats and the dealer has access to them. I suggest you purchase a subscription to alldatadiy.com. It will list all TSBs and steps to fix things like this. I would post it for you, but the procedures for fixing the squeaks are a long list of troubleshooting techniques with pictures. Here is one TSB that someone mentioned above that pretty much fixed the issue as he mentioned:
A. Repair Instructions 1. To better analyze the seat noises, maintain the customer's original seat positions, including cushion angles and backrest positions. It is a good idea to also store the customer's seat positions in vehicle memory. Note:
Seat noises can depend on individual seat positions involving the backrest and cushions as well as the manner in which customers enter and sit in the vehicle. 2. Analyze the noise problem with the customer present. Note their interpretations of various seat adjustments and resulting sounds from each seat and back rest positions. 3. Before performing any adjustments, be sure to unbolt the seat from the vehicle while keeping the electrical seat harness connected. 4. With the seat unbolted, use the seat control switch to move the seats over the entire adjustment ranges; i.e., all the way forward, back, up, down, etc. 5. Bolt the seat back
into the vehicle. The majority of complaints will be remedied by simply loosening and refastening the seats. 6. If noise still exists, remedy with felt and lubrication as specified in the Noise Kit (see Parts Information). Use only the parts from this kit.