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.
2009 Hummer H2 V8-6.2LFACTORY OEM SERVICE PROCEDURE
Computers and Control Systems: Technical Service Bulletins
- Recalls
- Customer Interest
- Engine Controls - MIL ON/DTC P2135 Set
- Electrical - Electrical Malfunction and or Multiple DTCs
- Electrical - MIL/DTC P2138 with Reduced Engine Power
- A/T Controls - DTC P1825/P182E or P1915/MIL ON
- Engine Controls - Stall On Deceleration When Hot
- Electrical - Warning Lamps/Electrical Malfunctions
- Engine Controls - MIL ON/DTC P0461 Set
- Fuel System - Driveability Issues/MIL ON/Multiple DTC's
- A/T Controls - MIL ON/Driveability Issues/Multpile DTC's
- Engine Controls - Cruise Control Shuts Off During Use
- Restraints - Service Airbag Message Displayed
- By Symptom
- Abnormal wear/deterioration
- Customer Interest
- Engine Controls - MIL ON/DTC P2135 Set
- Electrical - Electrical Malfunction and or Multiple DTCs
- Electrical - MIL/DTC P2138 with Reduced Engine Power
- A/T Controls - DTC P1825/P182E or P1915/MIL ON
- Engine Controls - Stall On Deceleration When Hot
- Electrical - Warning Lamps/Electrical Malfunctions
- Engine Controls - MIL ON/DTC P0461 Set
- Fuel System - Driveability Issues/MIL ON/Multiple DTC's
- A/T Controls - MIL ON/Driveability Issues/Multpile DTC's
- Engine Controls - Cruise Control Shuts Off During Use
- Restraints - Service Airbag Message Displayed
- Driveability
- Erratic Shifting
- False instrument warning light/gauges
- Inoperative
- Recalls
- All Technical Service Bulletins
- Campaign - Throttle Position Sensor Replacement
- Engine Controls - MIL ON/DTC P2135 Set
- Recall - Directional Indicator Rework
- Electrical - Electrical Malfunction and or Multiple DTCs
- Aftermarket Parts - Non GM Parts And Accessories Info
- Engine, A/T Controls - Non-GM Calibration ID
- Electrical - MIL/DTC P2138 with Reduced Engine Power
- A/T Controls - DTC P1825/P182E or P1915/MIL ON
- Engine Controls - Stall On Deceleration When Hot
- Electrical - Warning Lamps/Electrical Malfunctions
- A/T Controls - Procedure To Take Snapshot Data
- Engine Controls - MIL ON/DTC P0461 Set
- Fuel System - Driveability Issues/MIL ON/Multiple DTC's
- A/T Controls - DTC P0756 Diagnostics
- A/T Controls - MIL ON/Driveability Issues/Multpile DTC's
- Engine Controls - Cruise Control Shuts Off During Use
- Restraints - Service Airbag Message Displayed
- Body Controls - Body Control Module Grounds
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.
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