Symptoms. Buick GL7 (Export) 2000

For 1990-2009 cars

Important: Review the system operation in order to familiarize yourself with the system functions. Refer to:

• | HVAC Blower Controls Circuit Description

• | HVAC Compressor Controls Circuit Description

• | HVAC Air Delivery/Temperature Control Circuit Description

### Visual/Physical Inspection

• | Inspect for aftermarket devices which could affect the operation of the HVAC System. Refer to Checking Aftermarket Accessories in Wiring Systems.

• | Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

### Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

### Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

• | HVAC Compressor Clutch Does Not Engage

• | HVAC Compressor Clutch Does Not Disengage

• | Blower Motor Inoperative at Any Speed

• | Blower Motor Operates at High Speed Only

• | Blower Motor Inoperative in One Speed Only

• | Blower Motor High Speed Inoperative

• | Blower Motor Always On

• | Defrost Air Inoperative

• | Air Recirculation Inoperative

• | Temperature Control Inoperative

• | Leak Testing in Heating, Ventilation and Air Conditioning

• | Cooling Insufficient - Air Conditioning (A/C) System in Heating, Ventilation and Air Conditioning

• | Cooling Insufficient - Air Conditioning (A/C) System - Pressure Zone A in Heating, Ventilation and Air Conditioning

• | Cooling Insufficient - Air Conditioning (A/C) System - Pressure Zone B in Heating, Ventilation and Air Conditioning

• | Cooling Insufficient - Air Conditioning (A/C) System - Pressure Zone C in Heating, Ventilation and Air Conditioning

• | Cooling Insufficient - Air Conditioning (A/C) System - Pressure Zone D in Heating, Ventilation and Air Conditioning

• | Defrosting Insufficient in Heating, Ventilation and Air Conditioning

• | Heating Insufficient in Heating, Ventilation and Air Conditioning

• | Noise Diagnosis - Blower Motor in Heating, Ventilation and Air Conditioning

• | Noise Diagnosis - Air Conditioning (A/C) System in Heating, Ventilation and Air Conditioning

• | Cold Drafts on Floor in Heating, Ventilation and Air Conditioning

• | Odor Diagnosis in Heating, Ventilation and Air Conditioning