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TPMS DIAGNOSTIC INFORMATION – GMC Acadia 2007-2020
After the TREAD Act was mandated in 2007, all vehicles manufactured in the United States beginning in 2008, must be installed with direct or indirect TPMS systems.
The GMC Acadia is manufactured with a direct TPMS system, which means TPMS sensors are installed in the wheel. If one or more tires indicate low tire pressure, the TPMS sensors will transfer the information to the vehicle’s ECU. An indicator light (low-line TPMS system) or each tire pressure will show on the dash (high-line TPMS system).
When a sensor is replaced in one or more tires, one or more wheels are replaced or tires are rotated in a GMC Acadia, a manual (stationary) or OBD TPMS relearn is recommended to transfer new and/or existing TPMS sensor ID’s to the vehicle’s ECU.
Available for years 2008-2020
Manual relearn procedure:
The owner’s manual on the GMC Acadia states, “There are two minutes to match the first tire/wheel position, and five minutes overall to match all four tire/wheel positions. If it takes longer, the matching process stops and must be restarted.”
If the horn chirps twice before all steps have been performed or sensors have been activated, the relearn procedure most likely has failed and the ID’s did not transfer correctly, which means the procedure has to start over again.
The solution? For most GMC vehicles, the bonus OBD relearn procedure is available for the ATEQ VT56, thanks to patented Sync-ID technology. This advanced feature allows the user to perform an OBD relearn to turn the light off, with minimal to no driving time required to turn the light off, saving the technician time and the customer labor costs. It takes two minutes or less to perform an OBD relearn procedure on a GMC Acadia, and requires just one relearn procedure to memorize for various vehicle Makes.
Lowering the driver’s side window may help complete the process for larger GMC vehicles
GMC recommends rotating tires every 7,500 miles (12 000 kilometers). Tire rotation helps with even wear for all tires and is important for balanced handling on the road, which can extend the life of tires and save money in the long-run. When tires are rotated, GMC recommends resetting the TPMS system by performing a TPMS relearn to transfer the new location of the TPMS sensors to the vehicle’s ECU.
It is also recommended to do a TPMS reset after a wheel or sensor replacement.
The GMC Acadia was manufactured with 315 MHz TPMS sensors from 2007 through the first half of the production year. From the second half of the production year, the GMC Acadia is manufactured with 433 MHz TPMS sensors. Be sure to check the tool in the CHECK TPMS icon on the VT56, VT46, VT36 or VT31 tools to see which sensor frequency you are working with before replacing a TPMS sensor.
Use the VT56 to retrieve GMC TPMS DTC codes by selecting the “Service” icon. After selecting the Make, Model, and Year, select the DTC code icon. Use the OBDII module to retrieve the GMC DTC TPMS information to diagnose and service the TPMS issues determined.
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