If you are talking the actual heater/cooler fan unit under the seat or the back, they are plug and play. I know because I have a bad one in my ride as determined from the dealer. The dealer confirmed it is a plug and play so I just have to buy a new one and install. The unit in the seat back can be replace without removing the seat.
if i replace the module for the heated seats will it need to be programed or is it plug and play
According to the service manual........Yes.
Dual Climate Controlled Seat Module (DCSM)
Removal and Installation
WARNING: Never probe the electrical connectors on safety belt buckle/retractor pretensioners or adaptive load limiting retractors. Failure to follow this instruction may result in the accidental deployment of the safety belt pretensioners or adaptive load limiting retractors, which increases the risk of serious personal injury or death.
NOTE: The air bag warning indicator illuminates when the restraints control module (RCM) fuse is removed and the ignition switch is ON. This is normal operation and does not indicate a supplemental restraint system (SRS) fault.
NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
1.When installing a new dual climate controlled seat module (DCSM), carry out the appropriate steps in the programmable module installation (PMI) procedure. For additional information, refer to Section 418-01.
2.Position the front passenger seat fully upward and depower the SRS. For additional information, refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Section 501-20B.
3. CAUTION: Do not pull from the inboard side of the front seat cushion panel shield to avoid damaging it.
Remove the front seat cushion panel shield.
•Release the upper retaining clips working from the outboard side and then release the lower retaining clips.
4.Release the 2 tabs and slide out the DCSM.
5.Remove the DCSM.
•Cut and remove the wiring harness tie strap.
•Release the 2 locking wedges.
•Disconnect the 3 electrical connectors.
6.To install, reverse the removal procedure.
7.Repower the SRS. For additional information, refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Section 501-20B. 8.If a new DCSM has been installed, carry out the appropriate steps in the PMI procedure. For additional information, refer to Section 418-01.