GMC Envoy 1998-2000 HVAC Specifications
Explore the detailed HVAC system specifications for the 1998-2000 GMC Envoy. This guide includes comprehensive data on components, part numbers, and compatibility for maintenance, repair, and upgrades. Ideal for technicians and DIY enthusiasts.
Overview Specifications
This document provides detailed information about the HVAC (Heating, Ventilation, and Air Conditioning) system specifications for the 1998-2000 GMC Envoy. It is designed to assist owners, technicians, and enthusiasts in understanding the system's components, functionality, and maintenance. The document is organized into sections that cover various aspects of the HVAC system, including controls, components, and key specifications. Use the search and navigation instructions to quickly find the information you need.
How to Use
To search for specific terms or components within this document, use the search bar at the top of the page. Enter keywords related to the HVAC system, such as 'blower motor' or 'thermostat', and the relevant sections will be highlighted.
Navigate through the document by scrolling or using the table of contents. Each major section is clearly labeled, and subsections provide detailed information. Click on a section title to jump directly to that part of the document.
Key Specifications
Blower Motor Power
12V DC
Refrigerant Type
R134a
Heater Core Flow Rate
5 gal/min
AC Cooling Capacity
15,000 BTU/h
Cabin Air Filter Type
Pleated Paper
Available Specifications
HVAC Controls and Interface
This section covers the controls and interface of the HVAC system in the 1998-2000 GMC Envoy. It includes information on the control panel, settings, and how to operate the system effectively.
HVAC Controls and Interface
This section covers the controls and interface of the HVAC system in the 1998-2000 GMC Envoy. It includes information on the control panel, settings, and how to operate the system effectively.
Control Panel Layout
- Dual-zone climate control for driver and passenger
- Rotary dials for temperature adjustment
- Buttons for fan speed control
- Mode selector for vent, floor, and defrost settings
- AC and recirculation buttons
Operation Tips
- Start with fan speed on low to avoid overloading the system
- Use recirculation mode for faster cooling in hot weather
- Defrost mode automatically engages AC to reduce humidity
- Regularly check and replace cabin air filters for optimal performance
HVAC Components
This section details the major components of the HVAC system, including the blower motor, evaporator, and heater core. It provides insights into their functions and maintenance.
HVAC Components
This section details the major components of the HVAC system, including the blower motor, evaporator, and heater core. It provides insights into their functions and maintenance.
Blower Motor and Fan
- Located behind the glove compartment
- Variable speed controlled by the dashboard interface
- Common issues include motor failure or debris obstruction
- Regular cleaning can extend the motor's lifespan
Evaporator and Condenser
- Evaporator located inside the HVAC housing
- Condenser positioned in front of the radiator
- Both components crucial for AC cooling performance
- Check for leaks and blockages regularly
Heater Core
- Located inside the dashboard
- Uses engine coolant to provide heat
- Symptoms of failure include coolant leaks and lack of heat
- Flushing the system can prevent clogging
Maintenance and Troubleshooting
This section provides guidance on maintaining the HVAC system and troubleshooting common issues. It includes tips for routine checks and solutions for typical problems.
Maintenance and Troubleshooting
This section provides guidance on maintaining the HVAC system and troubleshooting common issues. It includes tips for routine checks and solutions for typical problems.
Routine Maintenance
- Inspect and replace cabin air filters annually
- Check refrigerant levels every two years
- Clean the evaporator and condenser coils
- Lubricate blower motor bearings if necessary
Common Issues and Solutions
- Weak airflow: Check for clogged filters or obstructed ducts
- No heat: Inspect heater core and coolant levels
- AC not cooling: Verify refrigerant levels and check for leaks
- Unusual noises: Inspect blower motor and fan for debris
Search Specifications
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Component Specifications
Overview
- Type
- Automatic Climate Control System
- Configuration
- Dual Zone
- Platform
- GMC Envoy
- Material
- Plastic and Aluminum
- Location
- Front Dashboard
Dimensions
- Blower Motor Diameter
- 5.5 inches / 140 mm
- Evaporator Core Length
- 12.8 inches / 325 mm
- Condenser Core Width
- 18.3 inches / 465 mm
- Heater Core Height
- 6.2 inches / 157 mm
- Compressor Pulley Diameter
- 4.9 inches / 125 mm
- Air Filter Size
- 7.5 x 9.5 x 1 inches / 190 x 240 x 25 mm
- Control Panel Width
- 6.7 inches / 170 mm
Materials
- Blower Motor
- Steel and Copper
- Evaporator Core
- Aluminum
- Condenser
- Aluminum and Copper
- Heater Core
- Brass and Aluminum
- Control Panel
- ABS Plastic
Features
- Climate Control
-
- Automatic Temperature Control
- Dual Zone Climate Settings
- Rear Defogger
- Recirculation Mode
- Air Distribution
-
- Face-Level Vents
- Floor Vents
- Windshield Defrost
- Side Window Defrost
- Air Quality
-
- Cabin Air Filter
- Automatic Air Recirculation
- Odor Reduction
- Comfort
-
- Adjustable Fan Speeds
- Temperature Memory
- Quick Cool Feature
Safety Features
- Overheat Protection
-
- High Pressure Cut-off Switch
- Thermal Fuse Protection
- System Monitoring
-
- Low Refrigerant Warning
- Compressor Overload Protection
- Electrical Safety
- Fused Circuit Protection
Comfort Features
- Temperature Control
-
- Precision Digital Thermostat
- Separate Driver/Passenger Controls
- Airflow Management
-
- Variable Blower Speeds
- Directional Air Vents
- Climate Presets
-
- Max AC
- Defrost/Defog
- Comfort Mode
Accessories
- Replacement Parts
-
- Cabin Air Filter
- Blower Motor
- AC Compressor
- Control Panel
- Maintenance Items
-
- Refrigerant
- O-Ring Kits
- System Cleaner
- Upgrades
-
- High-Efficiency Cabin Filter
- Performance Blower Motor
- Upgraded Control Panel
Maintenance
- Service interval
- Every 12 Months or 15,000 Miles
- Service Items
-
- Cabin Air Filter Replacement
- System Pressure Check
- Refrigerant Level Inspection
- Blower Motor Lubrication
- Condenser Cleaning
- Maintenance Notes
- Use only R-134a refrigerant. Verify system pressures during service.
Warranty
- Basic
- Years: 3Miles: 36000Coverage: Manufacturer Defects
- Powertrain
- Years: 5Miles: 60000Coverage: Compressor and Drive Components
- Corrosion
- Years: 6Miles: 100000Coverage: Condenser and Evaporator Cores
- Emissions
- Years: 2Miles: 24000Coverage: System Leak Detection
Production Details
- Manufacturer
- Delphi Automotive
- Manufacturing Process
-
- Precision CNC Machining
- Aluminum Brazing
- Plastic Injection Molding
- Automated Assembly
- Quality Control
- Pressure Testing: 300 PSI Leak TestElectrical Testing: Full System Load TestPerformance Verification: Temperature and Airflow Verification
- Sustainability Practices
-
- Recyclable Materials
- Low Emission Manufacturing
- Energy Efficient Production
- Production Metrics
- Units Per Day: 1200Defect Rate: 0.5%Energy Usage: 15 kW 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
- Verify blower motor operation
- Inspect for system leaks
- Clean condenser fins
Basic maintenance to ensure optimal system performance
- Full system pressure test
- Lubricate blower motor bearings
- Inspect compressor clutch
- Verify thermostat operation
- Clean evaporator core
More comprehensive inspection and maintenance required
- Replace cabin air filter
- Complete system flush
- Inspect and replace O-rings
- Verify compressor performance
- Test electrical connections
Major service interval requiring professional tools and equipment
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 Is the HVAC system compatible with aftermarket parts for the 1998-2000 GMC Envoy?
Is the HVAC system compatible with aftermarket parts for the 1998-2000 GMC Envoy?
The HVAC system in the 1998-2000 GMC Envoy is compatible with certain aftermarket parts, but it is recommended to use OEM parts for optimal performance and reliability. Aftermarket components such as blower motors, compressors, or condensers may fit, but they must meet the original specifications for pressure, voltage, and dimensions. Always verify compatibility with your vehicle's VIN before purchasing.
Q2 What is the maintenance schedule for the HVAC system in the 1998-2000 GMC Envoy?
What is the maintenance schedule for the HVAC system in the 1998-2000 GMC Envoy?
The HVAC system in the 1998-2000 GMC Envoy requires regular maintenance to ensure efficient operation. Inspect the cabin air filter every 12,000 miles or annually, and replace it if clogged. Check refrigerant levels every two years and recharge if necessary. Clean the evaporator and condenser coils annually, and inspect the blower motor and belt for wear. Lubricate moving parts as needed to reduce friction and noise.
Q3 How do I replace the cabin air filter in the 1998-2000 GMC Envoy?
How do I replace the cabin air filter in the 1998-2000 GMC Envoy?
To replace the cabin air filter in the 1998-2000 GMC Envoy, locate the filter housing behind the glove compartment. Open the glove box and remove any items inside. Squeeze the sides of the glove box to release it from its hinges. Remove the filter housing cover by releasing the clips or screws. Slide out the old filter and insert the new one, ensuring it is properly aligned. Reassemble the housing and glove box.
Q4 Why is my HVAC system blowing warm air instead of cold in my 1998-2000 GMC Envoy?
Why is my HVAC system blowing warm air instead of cold in my 1998-2000 GMC Envoy?
If your HVAC system is blowing warm air, check the refrigerant levels first, as low refrigerant is a common cause. Inspect the compressor for proper operation and ensure the clutch engages when the AC is turned on. Check for leaks in the system, particularly around hoses and connections. A faulty thermostat or blend door actuator could also cause this issue. If the problem persists, consult a professional technician.
Q5 How can I optimize the performance of the HVAC system in my 1998-2000 GMC Envoy?
How can I optimize the performance of the HVAC system in my 1998-2000 GMC Envoy?
To optimize HVAC performance, ensure the system is regularly maintained. Clean or replace the cabin air filter as needed to improve airflow. Keep the condenser and evaporator coils free of debris. Use the recirculation mode to cool the cabin faster. Park in shaded areas to reduce heat buildup. Perform periodic checks of refrigerant levels and address any leaks promptly. Regular inspections of belts and motors can also prevent unexpected failures.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
1998-2000 GMC Envoy HVAC Service Manual
Coming SoonThis manual provides detailed instructions for servicing and repairing the HVAC system in the 1998-2000 GMC Envoy, including troubleshooting and component replacement.
HVAC System Technical Bulletin for 1998-2000 GMC Envoy
Coming SoonThis bulletin addresses common issues and updates for the HVAC system in the 1998-2000 GMC Envoy, including recommended fixes and parts.
1998-2000 GMC Envoy HVAC Parts Catalog
Coming SoonThis catalog lists all OEM and compatible aftermarket parts for the HVAC system in the 1998-2000 GMC Envoy, including part numbers and descriptions.
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