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 List
Use the scan tool data list under the following conditions:
- The Diagnostic System Check - Vehicle is complete.
- The on-board diagnostics are functioning properly.
- No DTCs are present.
The values below represent a typical display recorded from a properly functioning system.
Only the parameters listed below are used in this manual for diagnosing. If a scan tool displays other parameters, the values are not recommended by General Motors for use in diagnosis.
Scan tool values below were recorded under the following conditions:
- Engine at idle
- Upper radiator hose hot
- Closed throttle
- Transmission in PARK
- Closed Loop operation
- Accessories OFF
- Brake pedal not applied
| Scan Tool Parameter | Data List* | Units Displayed | Typical Data Value |
|---|---|---|---|
| 1-2 Shift Error | F2, F7/F0 | Seconds | Varies |
| 1-2 Shift Time | F0, F2, F7/F0 | Seconds | Varies |
| 1-2 Sol. | F0, F2, F3, F4 | On/Off | On |
| 1-2 Sol. Open/Short to GND | F2 | Yes/No | No |
| 1-2 Sol. Short to Volts | F2 | Yes/No | No |
| 1-2 TAP Cell (4-16) | F7/F0 | kPa/Psi | Varies |
| 2-3 Shift Error | F3, F7/F1 | Seconds | Varies |
| 2-3 Shift Time | F0, F3, F7/F1 | Seconds | Varies |
| 2-3 Sol. | F0, F2, F3, F4 | On/Off | On |
| 2-3 Sol. Open/Short to GND | F3 | Yes/No | No |
| 2-3 Sol. Short to Volts | F3 | Yes/No | No |
| 2-3 TAP Cell (4-16) | F7/F1 | kPa/Psi | Varies |
| 3-2 Downshift Sol. | F0, F5 | On/Off | On |
| 3-2 Sol. Open/Short to GND | F5 | Yes/No | No |
| 3-2 Sol. Short to Volts | F5 | Yes/No | No |
| 3-4 Shift Error | F4 | Seconds | Varies |
| 3-4 Shift Time | F0, F4 | Seconds | Varies |
| 4WD | F0 | Enabled/Disabled | Disabled |
| 4WD Low | F0 | Enabled/Disabled | Disabled |
| A/C Clutch | F0 | On/Off | Off |
| Commanded Gear | F0, F1, F2, F3, F4, F5, F6 | 1, 2, 3, 4 | 1 |
| Cruise | F0 | Enabled/Disabled | Disabled |
| Current TAP Cell | F7/F0, F7/F1 | 4-16 | Varies |
| ECT | F0, F1 | Β°C (Β°F) | Varies |
| Engine Run Time | F0 | Hr/Min/Sec | Varies |
| Engine Speed | F0, F1, F2, F3, F4, F5, F6 | RPM | Varies |
| Engine Torque | F0, F1 | N.m (lb ft) | Varies |
| Estimated Gear Ratio | F0, F1, F2, F3, F4 | Ratio | 8.00:1 |
| Ignition Voltage | F0 | Volts | 12-14 Volts |
| Last Shift Time | F0 | Seconds | Varies |
| PC Sol. Actual Current | F0, F6 | Amps | Varies (0.1-1.1 amps) |
| PC Solenoid Duty Cycle | F0, F6 | Percent | Varies |
| PC Sol. Ref. Current | F0, F6 | Amps | Varies (0.1-1.1 amps) |
| Power Take Off | F0 | On/Off | On |
| Speed Ratio | F0, F1, F2, F3, F4, F5 | Ratio | 8.00:1 |
| TCC Brake Switch | F0, F1 | Open/Closed | Closed |
| TCC Duty Cycle | F0, F1 | Percent | 0% |
| TCC Duty Cycle Open/Short to GND | F1 | Yes/No | No |
| TCC Duty Cycle Short to Volts | F1 | Yes/No | No |
| TCC Enable | F0, F1 | Yes/No | No |
| TCC Enable Open/Short to GND | F1 | Yes/No | No |
| TCC Enable Short to Volts | F1 | Yes/No | No |
| TCC Slip Speed | F0, F1 | RPM | +/-50 RPM from Engine Speed |
| TFP Sw. | F0 | Park/Neutral, Reverse, Drive4, Drive3, Drive2, Drive1 or Invalid | Park/Neutral |
| TFP Sw. A/B/C | F0 | HI/LOW | HI/LOW/HI |
| TFT Sensor | F0, F1, F6 | Volts | Varies |
| Torque Converter Efficiency | F0, F1, F2, F3, F4 | Ratio | .00:1 |
| Tow/Haul Mode | F0 | Active/Inactive | Inactive |
| TP Angle (Vehicles w/o Traction Control) |
F0, F1, F2, F3, F4, F5, F6 | Percent | 0% |
| TP Indicated Angle (Vehicles with Traction Control) |
F0, F1, F2, F3, F4, F5, F6 | Percent | 0-10% |
| TP Sensor (Vehicles w/o Traction Control) |
F0, F1, F2, F3, F4, F5 | Volts | 0.3-0.9 V |
| TR Sw. | F0 | Park/Neutral, Reverse, Drive4, Drive3, Drive2, Drive1 or Invalid | Park/Neutral |
| TR Sw. A/B/C/P | F0 | HI/LOW | LOW/HI/HI/LOW |
| Trans. Fluid Temp. | F0, F1, F5, F6 | Β°C (Β°F) | Varies |
| Trans. Slip Counter | F0, F1 | 0, 1, 2 | 0 |
| Transfer Case Ratio | F0, F2, F3, F4 | Ratio | 2.61:1 |
| Transmission Hot Mode | F0, F1 | On/Off | Off |
| Transmission OSS | F0, F1, F2, F3, F4, F5 | RPM | 0 |
| Vehicle Speed | F0, F1, F2, F3, F4, F5 | km/h (mph) | 0 |
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*Data List Legend
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NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.