2009 Pontiac G8

The 2009 Pontiac G8 is a rear-wheel-drive sedan that was available with several engine and transmission options. The base model came with a 3.6L V6, while the GT model featured a 6.0L V8, producing 361 horsepower and 385 lb-ft of torque. The GXP was equipped with a 6.2L LS3 V8. The 3.6L V6 was paired with a 5-speed automatic transmission, while the GT model came standard with a 6-speed automatic. A 6-speed manual transmission was optional on the GT and standard on the GXP. Owners generally praised the G8 for its performance, handling, and comfortable interior, while common complaints revolved around fuel economy and some reliability issues.

Engine

6.0L V8 (L76)

• Active Fuel Management (AFM) Lifter Failure
  • Description/Symptoms: AFM lifters collapse, leading to misfires, rough idling, and potential engine damage. Often accompanied by a ticking or knocking noise.
  • Solution: Replace all lifters, including the AFM lifters, with updated non-AFM lifters and disable the AFM system with a tuner. Some opt to replace the camshaft as well, if damaged.
  • Estimated Cost to Fix: $2,000 - $4,000+
  • Recalls: None Found
• Oil Pressure Sensor Failure
  • Description/Symptoms: Faulty oil pressure sensor causes incorrect readings or no reading at all on the dashboard gauge, leading to potential misdiagnosis of engine problems.
  • Solution: Replace the oil pressure sensor.
  • Estimated Cost to Fix: $100 - $200
  • Recalls: None Found

Transmission

6L80E 6-Speed Automatic

• Torque Converter Failure
  • Description/Symptoms: Shuddering at low speeds, especially during light acceleration. May also cause stalling or difficulty shifting.
  • Solution: Replace the torque converter.
  • Estimated Cost to Fix: $800 - $1500
  • Recalls: None Found
• Harsh Shifting/Slipping
  • Description/Symptoms: Abnormally hard shift. Slippage between gears.
  • Solution: Replacement of Valve Body.
  • Estimated Cost to Fix: $600 - $1000+
  • Recalls: None Found

Suspension

• Strut Mount Failure
  • Description/Symptoms: Clunking noise from the front suspension, especially when going over bumps. Can also affect steering feel.
  • Solution: Replace the strut mounts.
  • Estimated Cost to Fix: $300 - $600
  • Recalls: None Found
• Rear Airbag Suspension Failure (if equipped)
  • Description/Symptoms: The rear of the vehicle sags. The air compressor may run continuously or not at all. Ride quality is negatively affected.
  • Solution: Replace the airbags, compressor, and/or height sensors.
  • Estimated Cost to Fix: $500 - $1500+
  • Recalls: None Found

Electrical

• Driver Information Center (DIC) Pixelation/Failure
  • Description/Symptoms: Pixels on the DIC fade or disappear, making it difficult to read information. The entire DIC may fail.
  • Solution: Replacement of the DIC screen or entire cluster.
  • Estimated Cost to Fix: $300 - $800+
  • Recalls: None Found
• Power Window Motor Failure
  • Description/Symptoms: Window moves slowly, intermittently, or not at all.
  • Solution: Replace the power window motor.
  • Estimated Cost to Fix: $200 - $400
  • Recalls: None Found

Exterior

• Headlight Condensation
  • Description/Symptoms: Moisture builds up inside the headlight housing, reducing visibility.
  • Solution: Remove the headlight and dry it out, reseal the housing, or replace the headlight assembly.
  • Estimated Cost to Fix: $100-$600 depending on method
  • Recalls: None Found

Interior

• Sunroof Issues
  • Description/Symptoms: Sunroof stuck open or closed. Sunroof motor failure.
  • Solution: Sunroof motor replacement
  • Estimated Cost to Fix: $300 - $600+
  • Recalls: None Found

Summary

The 2009 Pontiac G8 has a range of potential issues, with the most concerning being the AFM lifter failure on the 6.0L V8 engine. This can be a costly repair. Other issues, such as torque converter problems, suspension issues, and electrical malfunctions, can also lead to significant expenses. While the G8 offers a rewarding driving experience, potential buyers should be aware of these common problems and factor in potential repair costs.