2008 GMC T6500

Introduction: The 2008 GMC T6500 is a heavy-duty commercial truck available with a wide array of engine and transmission options. It is powered by a Detroit Diesel DD13 engine boasting 505 horsepower and 1,850 lb-ft of torque. Other engine options include the Caterpillar C15 and C16 with horsepower ratings up to 625. Transmission options vary from 10-speed Allison automatics to 18-speed Eaton manual transmissions. The GMC T6500 is praised for its durability, payload capacity, and towing capabilities. However, owners have reported several issues with the vehicle.

Engine: Detroit Diesel DD13

• EGR Cooler Failure: Premature failure of the EGR cooler leading to coolant leaks and overheating.
  • Solution: Replace EGR cooler and associated gaskets.
  • Estimated Cost to Fix: $2,000 - $3,000+
  • Recalls: None Found
• Fuel Injector Failure: Faulty fuel injectors cause rough idling, misfires, and power loss.
  • Solution: Replace faulty fuel injectors.
  • Estimated Cost to Fix: $400 - $600+ per injector
  • Recalls: None Found

Caterpillar C15

• Intake Manifold Gasket Failure: Leaks in the intake manifold gasket lead to air leaks and engine performance issues.
  • Solution: Replace intake manifold gasket.
  • Estimated Cost to Fix: $400 - $700
  • Recalls: None Found

Transmission: Allison 1000 Series Automatic

• Shifting Problems: Transmission may experience rough shifts, delayed shifts, or slipping gears.
  • Solution: Check transmission fluid level and condition. May require transmission rebuild or replacement.
  • Estimated Cost to Fix: $1,500 - $3,000+
  • Recalls: None Found

Eaton 18-Speed Manual

• Clutch Issues: Clutch slippage or difficulty shifting gears due to worn or damaged clutch components.
  • Solution: Replace clutch disc, pressure plate, and throwout bearing.
  • Estimated Cost to Fix: $1,200 - $1,800
  • Recalls: None Found

Suspension:

• Leaf Spring Failures: Excessive weight or rough road conditions can cause leaf springs to break or crack.
  • Solution: Replace broken leaf springs.
  • Estimated Cost to Fix: $600 - $1,200 per spring
  • Recalls: None Found

Electrical:

• Alternator Failures: Alternator failure leads to loss of electrical power and battery discharge.
  • Solution: Replace alternator.
  • Estimated Cost to Fix: $500 - $800
  • Recalls: None Found
• Wiring Harness Issues: Electrical shorts or loose connections in wiring harnesses can cause various electrical problems.
  • Solution: Repair or replace affected wiring harness.
  • Estimated Cost to Fix: $400 - $1,000+
  • Recalls: None Found

Exterior:

• Headlight Issues: Premature bulb burnout or condensation buildup in headlights impairing visibility.
  • Solution: Replace headlight bulbs or reseal headlights.
  • Estimated Cost to Fix: $100 - $300
  • Recalls: None Found
• Rust Issues: Exposure to corrosive elements can lead to rust on the undercarriage and body panels.
  • Solution: Undercarriage rustproofing and regular cleaning to prevent further corrosion.
  • Estimated Cost to Fix: Varies depending on the severity and location of rust

Interior:

• Climate Control System Failures: Malfunctioning HVAC system components can affect heating, cooling, and ventilation.
  • Solution: Diagnose and repair or replace faulty components (blower motor, compressor, etc.).
  • Estimated Cost to Fix: $200 - $800+ depending on the component
  • Recalls: None Found
• Instrument Panel Malfunctions: Faulty gauges or sensors on the instrument panel can provide incorrect or unreliable information.
  • Solution: Replace or repair affected gauges or sensors.
  • Estimated Cost to Fix: $250 - $600 depending on the component

Summary: The 2008 GMC T6500 has several known issues, mainly related to the engine, transmission, and electrical systems. The severity and cost of these issues can vary depending on the specific problem, vehicle mileage, and driving conditions. Regular maintenance and timely repairs are crucial to mitigate potential issues and ensure the longevity of the vehicle.