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2005 Hummer H2

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By Research the Car 4 min read

The 2005 Hummer H2 is a full-size SUV known for its bold styling and off-road capabilities. The sole engine option for this year was the 6.0L Vortec V8, producing around 325 horsepower and 365 lb-ft of torque. It was paired with the 4L60-E four-speed automatic transmission. Many owners appreciate the Hummer H2 for its distinctive appearance and spacious interior, while others dislike its poor fuel economy and large size, making it difficult to maneuver in urban environments.

Engine

6.0L Vortec V8

  • Exhaust Manifold Bolts Breaking
    • Description/Symptoms: A ticking sound coming from the engine, especially upon startup. This is caused by broken exhaust manifold bolts, creating an exhaust leak.
    • Solution: Replacing the broken bolts (often requires extracting broken pieces) and possibly replacing the exhaust manifold gasket.
    • Estimated Cost to Fix: $300 - $800+
    • Recalls: None Found
  • Oil Pressure Sensor Failure
    • Description/Symptoms: Erratic or inaccurate oil pressure readings on the dashboard gauge. Can sometimes trigger a “Check Engine” light.
    • Solution: Replacing the oil pressure sensor, which is located at the rear of the engine.
    • Estimated Cost to Fix: $100 - $300+
    • Recalls: None Found

Transmission

4L60-E Four-Speed Automatic

  • Torque Converter Failure
    • Description/Symptoms: Shuddering or vibration at highway speeds, especially when accelerating. Can also manifest as poor fuel economy.
    • Solution: Replacing the torque converter.
    • Estimated Cost to Fix: $800 - $1500+
    • Recalls: None Found
  • Harsh or Delayed Shifting
    • Description/Symptoms: Rough gear changes, hesitation when shifting, or failure to shift into certain gears.
    • Solution: Could be due to a variety of issues including low transmission fluid, worn valve body, or damaged solenoids. Diagnosis is critical before replacement of components. A full transmission rebuild or replacement might be necessary in severe cases.
    • Estimated Cost to Fix: $200 (fluid change) - $3000+ (rebuild/replace)
    • Recalls: None Found

Suspension

  • Air Suspension Compressor Failure (If Equipped)
    • Description/Symptoms: The rear of the vehicle sagging, failure to maintain ride height, and/or an error message on the dashboard indicating an issue with the air suspension system.
    • Solution: Replacing the air suspension compressor and checking for leaks in the air lines and air springs.
    • Estimated Cost to Fix: $400 - $1000+
    • Recalls: None Found
  • Air Suspension Air Spring Leaks (If Equipped)
    • Description/Symptoms: The rear of the vehicle sagging, especially overnight. A hissing sound may be heard near the rear wheels.
    • Solution: Replacing the leaking air springs (also known as air bags).
    • Estimated Cost to Fix: $300 - $800+ per air spring
    • Recalls: None Found

Electrical

  • Driver Information Center (DIC) Pixelation/Failure
    • Description/Symptoms: The digital display in the instrument cluster showing faded or missing pixels, making it difficult to read the information.
    • Solution: Replacing the DIC or having it repaired by a specialized electronics repair shop.
    • Estimated Cost to Fix: $200 - $600+
    • Recalls: None Found
  • Body Control Module (BCM) Issues
    • Description/Symptoms: Intermittent electrical problems such as malfunctioning power windows, door locks, or lights.
    • Solution: Diagnosing the specific issue with the BCM and either reprogramming or replacing the module.
    • Estimated Cost to Fix: $200 - $800+
    • Recalls: None Found

Exterior

  • Rust on Rocker Panels and Quarter Panels
    • Description/Symptoms: Visible rust developing on the lower sections of the body, particularly on the rocker panels and around the wheel wells.
    • Solution: Removing the rust, repairing the damaged metal, and repainting the affected areas. This can be a costly repair depending on the severity of the rust.
    • Estimated Cost to Fix: $500 - $3000+ (depending on severity)
    • Recalls: None Found
  • Headlight Housing Clouding/Yellowing
    • Description/Symptoms: The plastic headlight lenses becoming cloudy or yellowed, reducing visibility at night.
    • Solution: Polishing the headlight lenses with a headlight restoration kit or replacing the headlight housings.
    • Estimated Cost to Fix: $20 - $50 (DIY kit) - $300+ (replacement)
    • Recalls: None Found

Interior

  • Door Handle Breaking
    • Description/Symptoms: Interior door handle breaking
    • Solution: Replacing the door handle.
    • Estimated Cost to Fix: $100 - $300
    • Recalls: None Found
  • Sunroof Issues
    • Description/Symptoms: Sunroof failing to open or close, sunroof leaking.
    • Solution: Replacing the sunroof motor or resealing the sunroof.
    • Estimated Cost to Fix: $100 - $500
    • Recalls: None Found

Summary

The 2005 Hummer H2, while iconic, faces common issues related to its engine, transmission, suspension, and electrical systems. Exhaust manifold bolt failures and oil pressure sensor problems are typical engine concerns. Transmission issues, especially with the torque converter, are also prevalent. Owners should be aware of potential air suspension failures and electrical glitches affecting the DIC and BCM. Rust is a major concern for the vehicle. The severity and cost of repairs can vary widely, but addressing these potential issues proactively can help maintain the vehicle’s reliability and value.

Hummer, H2
Hummer H2 2005
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