2007 Pontiac Grand Prix

The 2007 Pontiac Grand Prix was a mid-size sedan known for its blend of performance and practicality. Engine options included a 3.8L V6 (200 hp and 230 lb-ft of torque), a 3.8L Supercharged V6 (260 hp and 280 lb-ft of torque), and a 5.3L V8 (303 hp and 323 lb-ft of torque) on the GXP model. All engines were paired with a 4-speed automatic transmission. People generally liked the Grand Prix for its spacious interior, comfortable ride, and available performance upgrades. Common dislikes included some cheap interior materials and a somewhat dated design.

Engine

3.8L V6

• Intake Manifold Gasket Failure
  • Description/Symptoms: Coolant leaks externally, often dripping near the front of the engine. Can lead to overheating if not addressed.
  • Solution: Replace the intake manifold gasket.
  • Estimated Cost to Fix: $300 - $500
  • Recalls: None Found
• Valve Cover Gasket Leak
  • Description/Symptoms: Oil leak around the valve covers, leading to oil consumption and potential drips onto the exhaust manifold causing a burning smell.
  • Solution: Replace the valve cover gaskets.
  • Estimated Cost to Fix: $150 - $300
  • Recalls: None Found

3.8L Supercharged V6

• Supercharger Coupler Failure
  • Description/Symptoms: Rattling or grinding noise from the supercharger, loss of boost.
  • Solution: Replace the supercharger coupler.
  • Estimated Cost to Fix: $200 - $400
  • Recalls: None Found
• Intercooler Pump Failure
  • Description/Symptoms: Overheating, reduced engine performance.
  • Solution: Replace the intercooler pump.
  • Estimated Cost to Fix: $250 - $450
  • Recalls: None Found

5.3L V8

• Active Fuel Management (AFM) Lifter Failure
  • Description/Symptoms: Misfires, rough running engine, and potential engine damage.
  • Solution: Replace the AFM lifters with updated versions or perform an AFM delete.
  • Estimated Cost to Fix: $1500 - $3000+
  • Recalls: None Found
• Oil Consumption
  • Description/Symptoms: Excessive oil consumption, blue smoke from exhaust.
  • Solution: Often requires piston ring replacement or engine rebuild in severe cases.
  • Estimated Cost to Fix: $2000 - $5000+
  • Recalls: None Found

Transmission

All 4T65-E Transmissions

• Torque Converter Clutch (TCC) Failure
  • Description/Symptoms: Shuddering during TCC lockup, trouble codes related to TCC performance.
  • Solution: Replace the torque converter.
  • Estimated Cost to Fix: $500 - $1000
  • Recalls: None Found
• Pressure Control Solenoid Failure
  • Description/Symptoms: Erratic shifting, harsh shifts, slipping.
  • Solution: Replace the pressure control solenoid.
  • Estimated Cost to Fix: $200 - $400
  • Recalls: None Found

Suspension

• Strut Mount Failure
  • Description/Symptoms: Clunking noise from the front suspension, especially over bumps.
  • Solution: Replace the strut mounts.
  • Estimated Cost to Fix: $200 - $400 per pair
  • Recalls: None Found
• Rear Air Suspension (GXP Models Only)
  • Description/Symptoms: Sagging rear suspension, failure of the air compressor.
  • Solution: Replace the air shocks, air compressor, or convert to conventional shocks.
  • Estimated Cost to Fix: $300 - $1000+ depending on the chosen repair.
  • Recalls: None Found

Electrical

• Ignition Switch Failure
  • Description/Symptoms: Car stalls while driving, key gets stuck in the ignition, loss of electrical power.
  • Solution: Replace the ignition switch.
  • Estimated Cost to Fix: $200 - $400
  • Recalls: #07V007000
• Instrument Panel Cluster Issues
  • Description/Symptoms: Gauges stop working or display incorrect readings, backlighting failure.
  • Solution: Repair or replace the instrument panel cluster.
  • Estimated Cost to Fix: $200 - $500
  • Recalls: None Found

Exterior

• Power Window Regulator Failure
  • Description/Symptoms: Window stops working, makes grinding noises when attempting to operate.
  • Solution: Replace the window regulator.
  • Estimated Cost to Fix: $150 - $300 per window
  • Recalls: None Found

Interior

• Steering Wheel Radio Controls Failure
  • Description/Symptoms: Buttons stop working or become unresponsive.
  • Solution: Replace the steering wheel control module.
  • Estimated Cost to Fix: $100 - $300
  • Recalls: None Found
• HVAC Actuator Failure
  • Description/Symptoms: Clicking noise behind the dashboard, temperature control issues (e.g., only blows hot or cold air).
  • Solution: Replace the HVAC actuator.
  • Estimated Cost to Fix: $150 - $400
  • Recalls: None Found

Summary

The 2007 Pontiac Grand Prix has several common issues to be aware of. Engine problems, particularly with the 5.3L V8’s AFM system and oil consumption, can be costly to repair. Transmission issues, especially related to the torque converter, are also relatively frequent. Electrical problems with the ignition switch and instrument cluster are also noted. Suspension issues are also common, particularly strut mount and rear air suspension failures. While some repairs are relatively inexpensive, major engine or transmission work can be significant. A thorough inspection is recommended before purchasing a used 2007 Grand Prix.