Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2025TRAILBLAZER ACTIV, 4WDREPAIR AND DIAGNOSIS (SINGLE PAGE)GENERAL INFORMATIONOEM GENERAL INFORMATIONVEHICLE DIAGNOSTIC SCAN TOOL INFORMATION (2 OF 2)SPECIFICATIONSK85 PASSENGER PRESENCE MODULE: SCAN TOOL INFORMATION
2025 Chevrolet Trailblazer ACTIV, 4WD
K85 Passenger Presence Module: Scan Tool Information
2025 Chevrolet Trailblazer ACTIV, 4WDSECTION K85 Passenger Presence Module: Scan Tool Information
Passenger Presence Module Scan Tool Data Parameters
| Parameter | Expected Value | Definition |
|---|---|---|
| Operating Conditions: Ignition ON | ||
| Base Model Part Number | Varies, 8 Digit Number | The scan tool displays the part number of the PPS module which is stored in non volatile memory. |
| Battery Voltage | Volts | The scan tool will display battery voltage. |
| Calibration Part Number | Varies, 8 Digit Number | The scan tool displays the part number of the calibration file in the PPS module. |
| End Model Part Number | Varies, 8 Digit Number | The scan tool displays the part number of the PPS module in production. |
| Manufacturer's Traceability Number | Varies, 16 Digit Number | The scan tool displays the 16 digit traceability number in the PPS module. |
| Passenger Air Bag Enable/Disable Request by Passenger Presence Module | Disable | The scan tool displays the Passenger Air Bag Enable/Disable Request by Passenger Presence Module. |
| Passenger Presence Module Primary Key | Hex Value | The scan tool indicates the primary key Hex value. |
| Passenger Presence System Reporting DTC(s) | Yes/No | The PPS module will report if there are DTCs set in the passenger presence module. |
| Passenger Seat Occupancy Status | Empty Seat | The scan tool displays Undefined, Empty Seat, Occupied, or Invalid. This is the state of the passenger seat if it is occupied or empty and monitored by the passenger presence system. |
| Power Mode | Off / Accessory / Run / Crank Request | The scan tool will display the power mode of the vehicle. |
| Primary Key Status | Valid/Invalid | The scan tool displays Valid if the primary key matches what is stored to memory in the PPS module. |
| Received Primary Key | Hex Value | The scan tool displays a Hex value indicating the PPS module received primary key data. |
| Software Part Number | Varies, 8 Digit Number | The scan tool displays the software part number in the PPS module. |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.