2008 Pontiac G6

2008 Pontiac G6

Overview

The 2008 Pontiac G6, a mid-size sedan, offered a range of powertrain options and a generally comfortable ride. While it aimed to provide a balance of performance and practicality, like many vehicles of its era, it experienced certain recurring issues that affected its long-term reliability. Owners reported a mixed bag of experiences, with some units proving quite dependable while others encountered specific problems, particularly concerning the powertrain and certain electrical components. Understanding these common failure points can be crucial for potential buyers and current owners looking to maintain their G6.

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Engine

3.5L V6 (LZ4)

Intake Manifold Gasket Leaks

• Symptoms: Coolant leaks, engine overheating, rough idle, and a sweet smell from the engine bay.
• Solution: Replacement of the intake manifold gaskets.
• Cost: $300 - $600

Oil Cooler Line Leaks

• Symptoms: Visible oil leaks around the oil cooler lines, potential loss of oil pressure.
• Solution: Replacement of the leaking oil cooler lines.
• Cost: $250 - $500

3.9L V6 (LZ9)

No widespread issues reported.

• Symptoms: N/A
• Solution: N/A
• Cost: Varies

2.4L 4-Cylinder (LE5)

No widespread issues reported.

• Symptoms: N/A
• Solution: N/A
• Cost: Varies

Transmission

4-Speed Automatic (4T65-E)

Torque Converter Issues

• Symptoms: Shuddering, slipping gears, delayed engagement, and potential failure to shift.
• Solution: Rebuilding or replacing the torque converter and potentially the transmission.
• Cost: $1000 - $2500

Transmission Fluid Leaks

• Symptoms: Leaking fluid from seals or lines, leading to low fluid levels and potential transmission damage.
• Solution: Repair or replacement of leaking seals or lines.
• Cost: $200 - $500

6-Speed Automatic (6T70/6T75)

No widespread issues reported.

• Symptoms: N/A
• Solution: N/A
• Cost: Varies

Suspension

Standard Chassis

No Major Issues

• Symptoms: N/A
• Solution: N/A
• Cost: Varies

Electrical

General Electrical System

Power Window Motor Failure

• Symptoms: Power windows not operating, slow operation, or unusual noises when attempting to use them.
• Solution: Replacement of the power window motor and regulator assembly.
• Cost: $250 - $500 per window

Faulty Ignition Switch

• Symptoms: Intermittent starting issues, dashboard lights flickering, or the vehicle shutting off unexpectedly.
• Solution: Replacement of the ignition switch.
• Cost: $150 - $300

Exterior

Body Panels and Trim

No Major Issues

• Symptoms: N/A
• Solution: N/A
• Cost: Varies

Interior

Cabin Components

No widespread issues reported.

• Symptoms: N/A
• Solution: N/A
• Cost: Varies

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Summary Verdict

The 2008 Pontiac G6 presents a mixed reliability profile. While the 2.4L and 3.9L engines generally perform well, the 3.5L V6 is more prone to intake manifold gasket leaks and oil cooler line issues. The 4-speed automatic transmission, particularly the 4T65-E, can suffer from torque converter problems and fluid leaks, requiring significant repair costs. Electrical issues like power window motors and ignition switches are also noted. The suspension, exterior, and interior components are generally considered reliable with no widespread critical failures. Prospective buyers should be aware of these potential powertrain and electrical concerns and factor in possible repair costs.