2006 Hummer H3

The 2006 Hummer H3 is a mid-size SUV known for its off-road capabilities and distinctive Hummer styling. Engine options included a 3.5L Inline-5 cylinder engine producing 220 horsepower and 225 lb-ft of torque. Later in the model year, a 3.7L Inline-5 replaced the 3.5L engine, increasing horsepower to 242. Transmission options were a 5-speed manual or a 4-speed automatic. Owners appreciate the H3’s ruggedness and unique appearance, but commonly dislike its fuel economy and smaller interior space compared to other SUVs.

Engine

3.5L Inline-5 Cylinder Engine

• Cylinder Head Cracking
  • Description/Symptoms: Overheating, coolant loss, white smoke from exhaust, engine misfire. Cracks typically develop in the cylinder head between the valve seats.
  • Solution: Replacement of the cylinder head.
  • Estimated Cost to Fix: $1500 - $2500+
  • Recalls: None Found
• Timing Chain Issues
  • Description/Symptoms: Rattling noise from the engine, especially on startup. Check engine light illuminated with codes related to timing issues. Could lead to poor performance and potential engine damage.
  • Solution: Replacement of the timing chain, tensioner, and guides.
  • Estimated Cost to Fix: $800 - $1500+
  • Recalls: None Found

3.7L Inline-5 Cylinder Engine

• Valve Train Noise
  • Description/Symptoms: Ticking noise, especially at idle. Could be related to lifters or rocker arms.
  • Solution: Replacement of worn lifters or rocker arms.
  • Estimated Cost to Fix: $500 - $1000+
  • Recalls: None Found

Transmission

4L60-E 4-Speed Automatic Transmission

• Harsh Shifting
  • Description/Symptoms: Hard or delayed shifts between gears, particularly between 1st and 2nd gear.
  • Solution: May require a transmission rebuild or replacement, depending on the severity of the damage.
  • Estimated Cost to Fix: $2000 - $4000+
  • Recalls: None Found
• Torque Converter Failure
  • Description/Symptoms: Shuddering or vibration at highway speeds, stalling, or complete transmission failure.
  • Solution: Torque converter replacement or complete transmission rebuild.
  • Estimated Cost to Fix: $500 - $2500+
  • Recalls: None Found

Aisin AR5 5-Speed Manual Transmission

• No Issues Found

Suspension

• Front Suspension Ball Joint Failure
  • Description/Symptoms: Clunking noise from the front suspension, especially when going over bumps. Play in the steering wheel. Uneven tire wear.
  • Solution: Replacement of the worn ball joints.
  • Estimated Cost to Fix: $300 - $600+
  • Recalls: None Found
• Leaf Spring Sag
  • Description/Symptoms: Sagging rear end, reduced load carrying capacity, poor ride quality.
  • Solution: Replacement of the leaf springs.
  • Estimated Cost to Fix: $500 - $1000+
  • Recalls: None Found

Electrical

• Transfer Case Motor Failure
  • Description/Symptoms: Inability to shift between 2WD and 4WD, service 4WD light illuminated.
  • Solution: Replacement of the transfer case motor.
  • Estimated Cost to Fix: $300 - $600+
  • Recalls: None Found
• Body Control Module (BCM) Issues
  • Description/Symptoms: Intermittent electrical problems, such as malfunctioning power windows, door locks, or lights.
  • Solution: BCM replacement and programming.
  • Estimated Cost to Fix: $400 - $800+
  • Recalls: None Found

Exterior

• Rust on Frame
  • Description/Symptoms: Visible rust on the frame, especially in areas exposed to road salt and moisture. Can weaken the frame over time.
  • Solution: Rust removal and frame repair, or frame replacement if damage is severe.
  • Estimated Cost to Fix: $500 - $5000+ (depending on severity)
  • Recalls: None Found
• Door Handle Failure
  • Description/Symptoms: Door handles breaking or becoming difficult to use.
  • Solution: Door handle replacement.
  • Estimated Cost to Fix: $50 - $200+
  • Recalls: None Found

Interior

• Sunroof Leak
  • Description/Symptoms: Water leaking into the cabin through the sunroof.
  • Solution: Cleaning and repairing the sunroof drains or replacing the sunroof seal.
  • Estimated Cost to Fix: $100 - $500+
  • Recalls: None Found

Summary

The 2006 Hummer H3, while a capable and stylish SUV, suffers from several common issues. Engine problems, particularly cylinder head cracking and timing chain issues with the 3.5L and valve train noise in the 3.7L, can be costly to repair. Transmission issues, especially with the 4L60-E automatic, can also lead to significant expenses. Suspension and electrical problems are also relatively common. Potential buyers should be aware of these issues and thoroughly inspect any prospective H3 before purchase. The severity and cost of these issues range from minor repairs to major overhauls, so budgeting for potential maintenance is essential.