Tire Pressure Rolling Count Procedure: Introduction

The Tire Pressure Rolling Count parameter for each sensor can be used to help confirm if the sensor transmissions are being received. As the vehicle is being driven, the Tire Pressure Rolling Count increments with every received TPM sensor transmission. If a suspected Sensor is not incrementing, incrementing very slowly compared to others or not at all, that could be a result of interference from aftermarket devices. The sensor transmission success rate (the rate at which each sensors transmission is being received by the RCDLR) can be verified in the scan tool.

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

• A sensor does not transmit or transmits invalid data to the RCDLR.
• A sensor might exhibit low battery condition.
• If equipped, the driver information center displays " dashes" for the suspected sensor.
• Aftermarket wheel valve system locations can cause a sensor to not function correctly.
• A sensor may have been damaged due to a previous wheel/tire service or flat tire event.
• The use of other than GM approved tire sealants can obstruct the sensor pressure sensing port and cause inaccurate tire pressure readings. If this condition is verified, remove the sealer from the tire and replace the sensor. Refer to Tire Pressure Indicator Sensor Replacement 
• Occasionally sensor transmissions are not received by the RCDLR due to vehicle level radio frequency interference from items such as but not limited to aftermarket ignition systems, DVD players, CB radios, or metallic type window tinting