Heating Up GMC Acadia Seats

Owners of 2012 GMC Acadia AWD trucks may comment that the front and/or rear heated seats are inoperative and/or the driver’s power seat only moves in short bursts each time the switch is operated. There will be no DTCs set in the MSM (memory seat module), RHVSM (rear heated/vented seat module) or HVSMF (front seat heating control module). When the seats are activated, there will be three clicks heard from the module.

Information courtesy of Mitchell 1

Mike Mavrigian

Feb. 1, 2023

Do not replace the module(s) MSM, RHVSM or HVSMF. Using TIS2WEB, reprogram only the affected module with updated calibrations. At the “Calibration Selection” screen in TIS2WEB, select the calibration with the description “For use on vehicles with power rail failure PIT5170 only, suspect vehicles built from 1/2012 through 6.2012.”

About the Author

Information courtesy of Mitchell 1

Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.

Mike Mavrigian

Motor Age Editor

Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety of specialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.