2011 GMC Acadia

The 2011 GMC Acadia is a full-size crossover SUV known for its spaciousness and comfortable ride. It was offered with a single engine option, a 3.6L V6 engine producing approximately 288 horsepower and 270 lb-ft of torque, paired with a 6-speed automatic transmission. Many owners appreciate the Acadia’s generous cargo space and third-row seating. However, some common complaints include issues with the timing chain, transmission, and electrical system.

Engine

3.6L V6 (LLT)

• Timing Chain Issues
  • Description/Symptoms: Excessive wear of the timing chain due to oil degradation or lack of maintenance. Symptoms include a check engine light, rough idling, engine misfires, and a rattling noise coming from the engine. This can lead to reduced engine performance and eventually complete engine failure if not addressed.
  • Solution: Replace the timing chain, guides, and tensioners. It is recommended to also inspect and clean the oil passages to ensure proper lubrication.
  • Estimated Cost to Fix: $1,500 - $2,500+
  • Recalls: None Found
• High Pressure Fuel Pump (HPFP) Failure
  • Description/Symptoms: The High Pressure Fuel Pump (HPFP) can start leaking over time. This leak causes a loss of fuel pressure. It also causes the fuel to enter the engine oil, causing it to become diluted, ultimately causing engine damage.
  • Solution: Replace the High Pressure Fuel Pump
  • Estimated Cost to Fix: $1,000 - $2,000+
  • Recalls: None Found

Transmission

6-Speed Automatic (6T70/6T75)

• Wave Plate Failure
  • Description/Symptoms: Cracking or complete failure of the 3-5-R wave plate inside the transmission. This results in delayed or harsh shifting, slipping between gears, or complete loss of certain gears.
  • Solution: Transmission rebuild or replacement with an updated wave plate design.
  • Estimated Cost to Fix: $3,000 - $5,000+
  • Recalls: None Found
• Torque Converter Failure
  • Description/Symptoms: The torque converter fails, causing shuddering during acceleration, poor fuel economy, and potential stalling.
  • Solution: Replace the torque converter and flush the transmission fluid.
  • Estimated Cost to Fix: $800 - $1,500+
  • Recalls: None Found

Suspension

• Worn Struts and Shocks
  • Description/Symptoms: Premature wear of the struts and shocks, leading to a bouncy ride, poor handling, and increased stopping distance.
  • Solution: Replacement of the struts and shocks.
  • Estimated Cost to Fix: $500 - $1,000+
  • Recalls: None Found
• Rear Suspension Issues
  • Description/Symptoms: Worn rear sway bar links leading to clunking noises and reduced stability during turns.
  • Solution: Replace rear sway bar links
  • Estimated Cost to Fix: $200 - $400+
  • Recalls: None Found

Electrical

• Power Window Regulator Failure
  • Description/Symptoms: Power windows failing to operate correctly, often getting stuck or moving slowly.
  • Solution: Replacing the power window regulator.
  • Estimated Cost to Fix: $200 - $400+ per window.
  • Recalls: None Found
• Stabilitrak/Traction Control Issues
  • Description/Symptoms: The “Service Stabilitrak” or “Service Traction Control” message appears, often accompanied by a loss of power or erratic braking. This can be caused by a faulty wheel speed sensor, steering angle sensor, or issues with the electronic brake control module (EBCM).
  • Solution: Diagnosing the root cause with a scan tool and replacing the faulty sensor or module. Sometimes, a software update can resolve the issue.
  • Estimated Cost to Fix: $100 - $1,000+ depending on the cause.
  • Recalls: None Found

Exterior

• Liftgate Issues
  • Description/Symptoms: The power liftgate failing to open or close properly, or making unusual noises. This is often due to a faulty liftgate motor, struts, or sensors.
  • Solution: Replace the faulty liftgate motor, struts, or sensors.
  • Estimated Cost to Fix: $300 - $800+
  • Recalls: None Found

Interior

• Air Conditioning Issues
  • Description/Symptoms: Weak or no cold air from the air conditioning system. This can be caused by a refrigerant leak, a faulty compressor, or a malfunctioning blend door actuator.
  • Solution: Repairing the refrigerant leak, replacing the compressor, or replacing the blend door actuator.
  • Estimated Cost to Fix: $200 - $1,200+
  • Recalls: None Found

Summary The 2011 GMC Acadia, while a comfortable and spacious SUV, is prone to several mechanical and electrical issues. Timing chain problems and transmission failures are among the most severe and costly repairs. Electrical issues, such as power window and stabilitrak malfunctions, can also be common. Prospective buyers should carefully inspect the vehicle’s maintenance history and consider a pre-purchase inspection to identify potential problems.