GMC Envoy 2002-2009 HVAC Specifications
Explore the detailed HVAC system specifications for the 2002-2009 GMC Envoy, including component details, performance metrics, and maintenance tips. Ideal for repairs, upgrades, and diagnostics.
Overview Specifications
This document provides detailed specifications and technical information about the HVAC (Heating, Ventilation, and Air Conditioning) system for the 2002-2009 GMC Envoy. It is designed to assist users in understanding the system's components, functionality, and maintenance requirements. Use this guide to navigate through sections, find specific details, and reference key specifications for troubleshooting or upgrades.
How to Use
Use the search functionality to quickly locate specific terms or components within the document. Enter keywords such as 'blower motor' or 'refrigerant type' to find relevant sections.
Navigate through the document by scrolling through the sections or using the table of contents. Each section is organized by major topics, with subsections providing detailed information.
Key Specifications
Refrigerant Type
R-134a
Blower Motor Voltage
12V
Cabin Air Filter Replacement Interval
12,000-15,000 miles
Compressor Belt Type
Serpentine Belt
Airflow Modes
Defrost, Floor, Vent
Available Specifications
HVAC System Components
This section outlines the primary components of the HVAC system in the 2002-2009 GMC Envoy, including the blower motor, evaporator, condenser, and compressor. Understanding these parts is essential for diagnosing issues and performing maintenance.
HVAC System Components
This section outlines the primary components of the HVAC system in the 2002-2009 GMC Envoy, including the blower motor, evaporator, condenser, and compressor. Understanding these parts is essential for diagnosing issues and performing maintenance.
Blower Motor
- Located behind the glove compartment
- Controls airflow speed
- Powered by a 12V electrical system
- Common issues include motor failure or resistor problems
Evaporator and Condenser
- Evaporator cools air inside the cabin
- Condenser releases heat from the refrigerant
- Both require periodic cleaning to maintain efficiency
- Leaks in these components can reduce cooling performance
Compressor
- Responsible for pressurizing refrigerant
- Driven by the engine via a serpentine belt
- Failure can lead to no cooling or unusual noises
- Requires proper refrigerant levels to function correctly
HVAC Controls and Settings
This section explains the various controls and settings available in the GMC Envoy's HVAC system, including temperature adjustment, fan speed, and air distribution modes.
HVAC Controls and Settings
This section explains the various controls and settings available in the GMC Envoy's HVAC system, including temperature adjustment, fan speed, and air distribution modes.
Temperature Control
- Manual or automatic temperature adjustment
- Uses a blend door to mix hot and cold air
- Thermostat regulates desired cabin temperature
- Issues may include stuck blend doors or faulty sensors
Fan Speed Settings
- Multiple speed options controlled by the blower motor
- Adjustable via a rotary knob or digital interface
- Resistor controls lower fan speeds
- High-speed issues may indicate a faulty resistor
Air Distribution Modes
- Options include defrost, floor, and vent modes
- Controlled by vacuum actuators or electric motors
- Mode doors direct airflow to desired areas
- Common problems include vacuum leaks or stuck doors
Maintenance and Troubleshooting
This section provides guidance on maintaining the HVAC system and troubleshooting common issues, such as poor airflow, unusual noises, or lack of heating/cooling.
Maintenance and Troubleshooting
This section provides guidance on maintaining the HVAC system and troubleshooting common issues, such as poor airflow, unusual noises, or lack of heating/cooling.
Regular Maintenance
- Replace cabin air filter every 12,000-15,000 miles
- Check refrigerant levels annually
- Inspect belts and hoses for wear or damage
- Clean condenser and evaporator coils periodically
Common Issues
- Weak airflow due to clogged filters or blower motor issues
- No cooling caused by low refrigerant or compressor failure
- Unusual noises from blower motor or compressor
- Inconsistent temperature due to blend door problems
Troubleshooting Tips
- Check fuses and relays for electrical issues
- Inspect vacuum lines for leaks in air distribution system
- Use a multimeter to test blower motor and resistor
- Consult a professional for refrigerant-related problems
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Component Specifications
Overview
- Type
- Automatic Climate Control
- Configuration
- Dual-Zone
- Platform
- GM GMT360
- Material
- Plastic and Aluminum
- Location
- Dashboard and Engine Compartment
Dimensions
- Evaporator Core Length
- 12.5 inches (31.75 cm)
- Evaporator Core Width
- 8.2 inches (20.83 cm)
- Evaporator Core Height
- 2.8 inches (7.11 cm)
- Heater Core Length
- 10.3 inches (26.16 cm)
- Heater Core Width
- 6.7 inches (17.02 cm)
- Heater Core Height
- 2.1 inches (5.33 cm)
- Blower Motor Diameter
- 5.9 inches (15 cm)
Materials
- Evaporator Core
- Aluminum
- Heater Core
- Aluminum
- Blower Motor
- Steel and Plastic
- Ducting
- High-Density Polyethylene
Features
- Climate Control
-
- Dual-Zone Temperature Control
- Automatic Temperature Regulation
- Rear Defrost
- Air Recirculation
- Air Distribution
-
- Front and Rear Vents
- Adjustable Airflow Direction
- Multi-Speed Blower
- Dual-Level Airflow
- Filtration
-
- Cabin Air Filter
- Pollen Filter
- Odor Reduction
- Defrosting
-
- Front Windshield Defrost
- Side Mirror Defrost
- Rear Window Defrost
- Controls
-
- Digital Temperature Display
- Rotary Knobs for Fan Speed
- Mode Selector Buttons
Safety Features
- Overheat Protection
-
- High-Temperature Cutoff
- Thermal Fuse
- Air Quality
-
- Cabin Air Filter
- Automatic Recirculation in Polluted Air
- System Monitoring
-
- Low Refrigerant Warning
- Blower Motor Overload Protection
Comfort Features
- Temperature Control
-
- Dual-Zone Adjustment
- Precise Temperature Settings
- Airflow
-
- Multi-Speed Blower
- Adjustable Vents
- Noise Reduction
-
- Quiet Blower Motor
- Insulated Ducting
- Defrosting
-
- Quick Defrost for Windshield
- Automatic Rear Defrost
Accessories
- Filters
-
- Cabin Air Filter
- Pollen Filter
- Activated Carbon Filter
- Controls
-
- Remote Start Climate Control
- Steering Wheel Controls
- Digital Display
- Ducting
-
- Front Vent Ducts
- Rear Vent Ducts
- Defrost Ducts
Maintenance
- Service interval
- Every 15,000 miles or 12 months
- Service Items
-
- Inspect and Replace Cabin Air Filter
- Check Refrigerant Levels
- Inspect Blower Motor
- Test Temperature Sensors
- Clean Evaporator Core
- Maintenance Notes
- Use only R134a refrigerant. Ensure proper sealing of HVAC system to prevent leaks.
Warranty
- Basic Warranty
- Miles: 36,000Years: 3Coverage: Parts and Labor
- Powertrain Warranty
- Miles: 100,000Years: 5Coverage: Blower Motor and Compressor
- Corrosion Warranty
- Miles: 100,000Years: 6Coverage: HVAC Housing and Ducts
- Emissions Warranty
- Miles: 50,000Years: 4Coverage: Refrigerant System
Production Details
- Manufacturer
- General Motors
- Manufacturing Process
-
- Automated Assembly
- Precision Welding
- Quality Testing
- Quality Control
- Pressure Testing: Evaporator and Heater CoresLeak Detection: Refrigerant SystemPerformance Testing: Blower Motor and Controls
- Sustainability Practices
-
- Recyclable Materials
- Low-Emission Refrigerant
- Energy-Efficient Production
- Production Metrics
- Units Per Year: 500,000Defect Rate: 0.5%Energy Usage: 15 kWh per unit
Service Information for HVAC Service
Maintenance and service requirements specific to the HVAC system
- Inspect and Replace Cabin Air Filter
- Check Refrigerant Levels
- Inspect Blower Motor
- Test Temperature Sensors
- Clean Evaporator Core
Ensure proper sealing of HVAC system to prevent leaks.
- Replace Cabin Air Filter
- Inspect Heater Core
- Check HVAC Ducts for Leaks
- Test Defrost Functionality
- Inspect Compressor
Use only R134a refrigerant for recharging.
- Replace Refrigerant
- Inspect and Clean Evaporator Core
- Test Blower Motor Performance
- Check Electrical Connections
- Inspect HVAC Control Module
Perform a full system pressure test to ensure no leaks.
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What are the compatibility requirements for HVAC systems in 2002-2009 GMC Envoy models?
What are the compatibility requirements for HVAC systems in 2002-2009 GMC Envoy models?
The HVAC system in 2002-2009 GMC Envoy models is compatible with R134a refrigerant and requires a specific blend motor, compressor, and condenser designed for these years. Ensure the replacement parts match the OEM specifications, including the correct voltage for electrical components and the proper refrigerant capacity. Cross-check part numbers with the vehicle's VIN for accuracy.
Q2 What maintenance is required for the HVAC system in a 2002-2009 GMC Envoy?
What maintenance is required for the HVAC system in a 2002-2009 GMC Envoy?
Regular maintenance includes inspecting and replacing the cabin air filter every 15,000-30,000 miles, checking refrigerant levels annually, and ensuring the compressor and blower motor are functioning properly. Clean the evaporator and condenser coils to prevent debris buildup. Inspect hoses and seals for leaks, and test the system's heating and cooling performance seasonally.
Q3 How do I replace the HVAC blower motor in a 2002-2009 GMC Envoy?
How do I replace the HVAC blower motor in a 2002-2009 GMC Envoy?
To replace the blower motor, disconnect the battery, remove the glove box, and locate the blower motor under the dashboard. Disconnect the electrical connector and mounting screws, then carefully remove the motor. Install the new motor, reconnect the wiring, and secure it with screws. Reassemble the glove box and reconnect the battery. Test the system to ensure proper operation.
Q4 What should I do if the HVAC system in my GMC Envoy is not cooling properly?
What should I do if the HVAC system in my GMC Envoy is not cooling properly?
First, check the refrigerant levels and recharge if necessary. Inspect the compressor clutch for engagement and ensure the condenser fan is working. Clean the condenser and evaporator coils, and check for leaks in the system. If the issue persists, test the blend door actuator and temperature control sensors for proper functionality.
Q5 How can I optimize the performance of my GMC Envoy's HVAC system?
How can I optimize the performance of my GMC Envoy's HVAC system?
Ensure the system is regularly serviced, including refrigerant recharges and filter replacements. Use a sunshade to reduce cabin heat and improve cooling efficiency. Park in shaded areas to minimize strain on the system. Periodically clean the condenser and evaporator coils, and inspect the blower motor and compressor for optimal performance.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
2002-2009 GMC Envoy HVAC Service Manual
Coming SoonDetailed service manual covering HVAC system diagnostics, repair procedures, and maintenance schedules for 2002-2009 GMC Envoy models.
HVAC System Technical Service Bulletin for GMC Envoy
Coming SoonTechnical bulletin addressing common HVAC issues, updates, and recommended fixes for 2002-2009 GMC Envoy models.
GMC Envoy HVAC Parts and Accessories Catalog
Coming SoonComprehensive catalog of OEM and aftermarket HVAC parts, including compressors, condensers, and blower motors for 2002-2009 GMC Envoy models.
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