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
Maintenance: Technical Service Bulletins
- Customer Interest
- A/C - Underhood Rattle Noise on Acceleration
- Wheels - Plastic Wheel Nut Covers Loose/Missing
- Tires/Wheels - Plastic Wheel Nut Covers Loose/Missing
- Fuel System - Low/Rough/Unstable Idle
- Engine - Over Oiled Aftermarket Air Filter Concerns
- Wheels - Pitting/Brake Dust On Chrome Wheel
- Engine - Various Drive Belt Symptoms
- Wheels - Chrome Wheel Staining/Pitting/Corrosion
- Tires/Wheels - Low Tire Pressure/Leaking Wheels
- Wheels/Tires - Tire Slowly Goes Flat/Warning Light On
- Tires/Wheels - Tire Radial Force Variation (RFV)
- By Symptom
- Abnormal wear/deterioration
- Customer Interest
- A/C - Underhood Rattle Noise on Acceleration
- Wheels - Plastic Wheel Nut Covers Loose/Missing
- Tires/Wheels - Plastic Wheel Nut Covers Loose/Missing
- Fuel System - Low/Rough/Unstable Idle
- Engine - Over Oiled Aftermarket Air Filter Concerns
- Wheels - Pitting/Brake Dust On Chrome Wheel
- Engine - Various Drive Belt Symptoms
- Wheels - Chrome Wheel Staining/Pitting/Corrosion
- Tires/Wheels - Low Tire Pressure/Leaking Wheels
- Wheels/Tires - Tire Slowly Goes Flat/Warning Light On
- Tires/Wheels - Tire Radial Force Variation (RFV)
- Driveability
- Inoperative
- Leaks
- Loose
- Noise
- All Technical Service Bulletins
- Warranty - Straight Time Pilot Program
- A/C - Underhood Rattle Noise on Acceleration
- Wheels/Tires - Recommended Wheel Nut Torque
- Wheels - Plastic Wheel Nut Covers Loose/Missing
- Tires/Wheels - Plastic Wheel Nut Covers Loose/Missing
- Drivetrain - Revised Fluid Capacities/Wheel Nut Torque
- A/T - Oil Cooler Flushing/Flow Check Procedures
- Fuel System - Low/Rough/Unstable Idle
- A/T - Shift Stabilization/Tow/Haul Mode Feature
- Engine - Serpentine Drive Belt Wear Information
- Audio System - Diagnostics for No Sound From Speakers
- Wheels/Tires - Wheel Weight Usage
- Wheels/Tires - Wheel Weight Usage and Precautions
- Drivetrain - Revised Front Differential Lubricant Info.
- Steering/Suspension - Revised Caster/Camber Adjustment
- A/C - New PAG Oil Availability
- Vehicle - Recreational (Dinghy) Towing
- Cooling System - Recycled Coolant Information
- Engine Controls - Normal MIL Operation Information
- A/C - Contaminated R134a Refrigerant Information
- Engine - Over Oiled Aftermarket Air Filter Concerns
- Electrical - Aftermarket Fuse Warning
- Cooling System - Updated Leak Detection Dye
- A/C - Refrigerant Recovery/Recharge Equipment Info
- Wheels - Pitting/Brake Dust On Chrome Wheel
- Engine/Fuel System - Additive Information
- Alignment - Specification/Requirement/Recommendation
- Tire Monitor System - Pressure Sensor Information
- Ignition System - New Spark Plugs/Gapping Procedure
- A/T - Water/Coolant Contamination Information
- Engine - Oil Consumption Guideline Information
- Engine - Oil Consumption Verification
- Wheels/Tires - Tire Wheel Placard Requirements
- Wheels/Tires - OE Wheel/Tire Characteristics
- Wheels/Tires - Chrome/Steel Valve Stem Cap Precautions
- Engine - Noise/Damage After Oil Filter Replacement
- Engine - Various Drive Belt Symptoms
- Wheels/Tires - Mounting/Balancing ACC Wheel and Tires
- Tires/Wheels - Refinishing Aluminum Wheels
- Tires/Wheels - Replacement Wheel Weight Information
- Wheels - Chrome Wheel Staining/Pitting/Corrosion
- Tires/Wheels - Low Tire Pressure/Leaking Wheels
- Wheels/Tires - Tire Slowly Goes Flat/Warning Light On
- Tires/Wheels - Tire Radial Force Variation (RFV)
- Tires/Wheels - Tire Puncture Repair Procedures
- Tires/Wheels - Use of Nitrogen Gas in Tires
- Wheels/Tires - Proper Wheel Changing Procedures/Cautions
- Tires/Wheels - Tire Pressure Sensors Service/Re-Learning
- A/T - Release of DEXRON(R)-VI A/T Fluid
- Tires/Wheels - THIS BULLETIN HAS BEEN CANCELED
- A/T - Fluid Oil Cooler Flow Test
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.