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.
Scan Tool Data Definitions
- 8 Digit GM Part Number
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The scan tool displays the eight digit part number of the power roof module.
- Average Roof Speed
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The scan tool displays mm/s. The average millimeters per second that the power roof travels when opening and closing.
- Battery 1
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The scan tool displays 9-15 volts. The state of the battery voltage supplied to the power roof module.
- Battery 2
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The scan tool displays 9-15 volts. The state of the battery voltage supplied to the power roof module.
- Cargo End Gate Window Sw.
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The scan tool displays Active/Inactive. The cargo end gate window switch input to the PRM, where a switch press is displayed as Active.
- End Gate Window Switch
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The scan tool displays Idle/Up/Down. The end gate key cylinder switch input to the PRM, where a cylinder activation to the left or right is displayed as Up or Down.
- Hall Sensor 1
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The scan tool displays mm. The power roof motor hall sensor 1 input to the PRM displayed in millimeters.
- Hall Sensor 2
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The scan tool displays mm. The power roof motor hall sensor 2 input to the PRM displayed in millimeters.
- Ignition Counter
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The scan tool displays a numerical value. The number of ignition switch cycles.
- Julian Date of Build
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The scan tool displays the 4-digit date of the end gate module build.
- Learned Travel Distance
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The scan tool displays mm. The learned travel distance of the PRM displayed in millimeters.
- Motor Current
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The scan tool displays amps. The power roof motor amperage draw.
- Power Mode
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The scan tool displays Off Awake/Retained Accessory Power/Accessory/Run/Crank. The ignition switch input states to the PRM used for power moding.
- Power Roof Switch
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The scan tool displays Idle/Open/Close. The power roof switch input to the PRM, where a switch activation is displayed as Open or Closed.
- Software Part Number
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The scan tool displays the 8-digit part number of the power roof module software.
- Software Revision Number
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The scan tool displays the 2-digit revision number of the power roof module software.
- Year Module Built
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The scan tool displays the 4-digit date of the year the power roof module was built.
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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.