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.
2003 Hummer H2 V8-6.0LFACTORY OEM SERVICE PROCEDURE
Trim Height Calibration Procedure
TRIM HEIGHT CALIBRATION PROCEDURE
1. Depressurize the air suspension system to lower rear of vehicle.
2. Raise and support rear of vehicle at D height. 132 mm (5.2 in).
3. The D height is obtained by measuring the distance between the edge of the jounce cup along the jounce bumper center line and the jounce pad on the rear axle.
4. With the scan tool perform the calibrate trim height procedure in air suspension special functions.
5. Check scan tool data list for trim height learned. Typical data value will be YES.
6. If trim height was not accepted the typical data value will be NO and DTC C0569 will set.
1. Depressurize the air suspension system to lower rear of vehicle.
2. Raise and support rear of vehicle at D height. 132 mm (5.2 in).
3. The D height is obtained by measuring the distance between the edge of the jounce cup along the jounce bumper center line and the jounce pad on the rear axle.
4. With the scan tool perform the calibrate trim height procedure in air suspension special functions.
5. Check scan tool data list for trim height learned. Typical data value will be YES.
6. If trim height was not accepted the typical data value will be NO and DTC C0569 will set.
Factory Service Tools
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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.