Manufacturer communication — 2006 GMC YUKON

• All brands and models, model years 2000 - 2024.

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  Models Brand: Model: Model Years: VIN: Engine: Transmissions: from to All All 2000 - 2024 All All All All

• The customer may comment that the A/C blows warm or that A/C performance is poor.

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  Customer may comment that there A/C blows warm or they have poor A/C performance.

Steps to confirm (in the document’s order)

1. Before calling GM TAC for technical assistance, have the listed information available to help diagnose the vehicle.

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   When technical assistance is required and before calling GM TAC, the following information will be helpful in assisting with diagnosing the vehicle. Please have the following information available:

2. Record the A/C high and low pressures, high side sensor reading, A/C compressor duty cycle, refrigerant solenoid valve command in HVAC data (if equipped), outside temperature, humidity and vent temperature.

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   * A/C High and Low pressures * High side sensor reading * A/C compressor duty cycle * Refrigerant solenoid valve command in HVAC data (if equipped) * Outside temperature * Humidity * Vent temperature

3. With an automatic HVAC system, read with the scan tool the evaporator temperature sensor (if equipped), inside temperature sensor, outside temperature sensor and duct temperature sensor readings.

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   If the unit is equipped with an Automatic HVAC system, go into the HVAC data with the scan tool and get the following readings: * Evaporator temperature sensor reading (if equipped) * Inside temperature sensor reading * Outside temperature sensor reading * Duct temperature sensor readings