2018 Chevrolet Tahoe

Here’s a comprehensive list of common issues and complaints for the 2018 Chevrolet Tahoe, categorized by component and engine/transmission option.

The 2018 Chevrolet Tahoe is a full-size SUV known for its spacious interior, comfortable ride, and towing capability. It offers a blend of practicality and features that appeal to families and those needing a robust vehicle. However, like any vehicle, it has its share of common issues. While many appreciate its versatility and spaciousness, common complaints include the higher price point, size making it difficult to park, and fuel economy. The 2018 Tahoe came with three engine options: a 5.3L EcoTec3 V8 producing 355 horsepower and 383 lb-ft of torque, a 6.2L EcoTec3 V8 producing 420 horsepower and 460 lb-ft of torque (available on the Premier trim), and a 6.0L V8 in 2WD and 4WD drivetrain options. The 5.3L V8 was typically paired with a 6-speed automatic transmission, while the 6.2L V8 was paired with a 10-speed automatic transmission.

Engine

5.3L EcoTec3 V8

• Active Fuel Management (AFM) Lifter Failure
  • Description/Symptoms: Engine misfires, rough idling, check engine light illuminated. This is due to the AFM system which deactivates cylinders to save fuel. The lifters collapse and cause damage to the camshaft.
  • Solution: Replace the affected lifters, camshaft, and potentially other valve train components. Some owners choose to delete the AFM system entirely.
  • Estimated Cost to Fix: $3,000 - $6,000+
  • Recalls: None Found
• Excessive Oil Consumption
  • Description/Symptoms: Low oil level warnings, blue smoke from the exhaust, needing to add oil frequently between oil changes. Can be related to the AFM system or piston ring issues.
  • Solution: Diagnosis to determine the cause. Could involve replacing piston rings, repairing valve seals, or addressing AFM-related issues.
  • Estimated Cost to Fix: $2,000 - $5,000+ depending on the repair
  • Recalls: None Found

6.2L EcoTec3 V8

• Active Fuel Management (AFM) Lifter Failure
  • Description/Symptoms: Similar to the 5.3L V8, engine misfires, rough idling, check engine light.
  • Solution: Similar to the 5.3L V8, replace lifters, camshaft, and potentially other components. AFM delete is also an option.
  • Estimated Cost to Fix: $3,000 - $6,000+
  • Recalls: None Found
• Direct Injection Carbon Buildup
  • Description/Symptoms: Rough idle, decreased fuel economy, reduced performance. Direct injection engines can experience carbon buildup on the intake valves.
  • Solution: Intake valve cleaning (walnut blasting or chemical cleaning).
  • Estimated Cost to Fix: $500 - $1,000
  • Recalls: None Found

6.0L V8

No Issues Found

Transmission

6-Speed Automatic (Paired with 5.3L V8)

• Torque Converter Shudder
  • Description/Symptoms: A shudder or vibration felt during light acceleration, typically at lower speeds.
  • Solution: Some have had success with a transmission fluid flush using a fluid specifically designed to mitigate shudder. Replacement of the torque converter may be necessary.
  • Estimated Cost to Fix: Fluid Flush $200 - $400. Torque converter replacement $800 - $1500+
  • Recalls: None Found

10-Speed Automatic (Paired with 6.2L V8)

• Harsh or Erratic Shifting
  • Description/Symptoms: Abrupt or inconsistent shifts between gears, potentially accompanied by clunking noises.
  • Solution: Software update to the transmission control module (TCM). In some cases, valve body replacement may be needed.
  • Estimated Cost to Fix: Software update $100 - $200. Valve body replacement $800 - $2,000+
  • Recalls: None Found

Suspension

• Magnetic Ride Control (MRC) Failure (If Equipped)
  • Description/Symptoms: The MRC system provides adaptive damping. Failure can result in a harsh or bouncy ride, error messages on the dashboard, and potential leaks from the shocks.
  • Solution: Replacement of the affected MRC shocks.
  • Estimated Cost to Fix: $800 - $1,500+ per shock
  • Recalls: None Found

Electrical

• Infotainment System Issues
  • Description/Symptoms: Freezing, lagging, blank screen, connectivity problems with Bluetooth or Apple CarPlay/Android Auto.
  • Solution: Software updates, replacement of the infotainment unit in severe cases.
  • Estimated Cost to Fix: Software update $0 - $150 (dealer charge). Unit replacement $500 - $1,500+
  • Recalls: None Found
• Battery Drain
  • Description/Symptoms: Battery drains overnight, requiring jump starts, or premature battery failure.
  • Solution: Diagnose parasitic drain sources. Common causes include aftermarket accessories, faulty door actuators, or failing modules.
  • Estimated Cost to Fix: $100-$1,000+ Depending on the source of the drain.
  • Recalls: None Found

Exterior

• Automatic Liftgate Problems
  • Description/Symptoms: Liftgate fails to open or close properly, makes unusual noises, or stops mid-cycle.
  • Solution: Check struts, sensors, or motor. Replace faulty components.
  • Estimated Cost to Fix: $200-$800+ Depending on which components need to be replaced.
  • Recalls: None Found

Interior

• Cracked Dashboard
  • Description/Symptoms: Cracks appearing on the dashboard, particularly in hot climates.
  • Solution: Dashboard replacement (expensive) or dashboard cover.
  • Estimated Cost to Fix: $800 - $2,000+ for replacement. Cover $50 - $200
  • Recalls: None Found

Summary

The 2018 Chevrolet Tahoe has some notable potential issues. The most serious involve the engine, particularly the Active Fuel Management (AFM) system, which can lead to costly repairs. The 10-speed transmission, while offering smooth performance when functioning correctly, can experience harsh shifting. Issues with the infotainment system and liftgate are common annoyances. While these issues are not present in every vehicle, prospective buyers should be aware of them and factor them into their decision-making process and budget. Overall, the severity of these issues ranges from moderate inconvenience to significant expense.