2004 GMC T7500

Introduction: The 2004 GMC T7500 is a heavy-duty truck available with various engine and transmission combinations. Its Duramax diesel engine options offer impressive horsepower and torque, making it a popular choice for hauling and towing applications. Despite its rugged capabilities, the T7500 has encountered some issues reported by owners.

Engine

• Duramax 6.6L Diesel Engine
  • Fuel Injector Failure:
    • Description/Symptoms: Engine misfires, rough idling, loss of power, increased fuel consumption
    • Solution: Replace faulty injectors
    • Estimated Cost to Fix: $1,000 - $2,500+
    • Recalls: None Found
  • Turbocharger Problems:
    • Description/Symptoms: Loss of boost, reduced engine power, black smoke from exhaust
    • Solution: Replace or rebuild turbocharger
    • Estimated Cost to Fix: $1,500 - $3,000+
    • Recalls: None Found
• Duramax 7.8L Diesel Engine
  • No Issues Found

Transmission

• Allison 1000 5-Speed Automatic Transmission:
  • Torque Converter Shudder:
    • Description/Symptoms: Vibration when accelerating, especially at low speeds
    • Solution: Replace torque converter or transmission fluid
    • Estimated Cost to Fix: $1,000 - $2,000+
    • Recalls: None Found
• Allison 3000 6-Speed Automatic Transmission:
  • Shifting Problems:
    • Description/Symptoms: Hard shifting, delayed shifting, slipping gears
    • Solution: Repair or replace transmission
    • Estimated Cost to Fix: $2,000 - $4,000+
    • Recalls: None Found

Suspension

• Front Suspension:
  • Ball Joint Failure:
    • Description/Symptoms: Clunking or popping sound when turning or hitting bumps
    • Solution: Replace ball joints
    • Estimated Cost to Fix: $500 - $1,000+
    • Recalls: None Found
• Rear Suspension:
  • Leaf Spring Breakage:
    • Description/Symptoms: Sagging or uneven ride height, difficult steering
    • Solution: Replace leaf springs
    • Estimated Cost to Fix: $1,000 - $2,000+
    • Recalls: None Found

Electrical

• Battery Drain: * Description/Symptoms: Battery dies prematurely, even with new battery * Solution: Check for parasitic draw, replace faulty components * Estimated Cost to Fix: $200 - $500+ * Recalls: None Found
• Headlight Failure: * Description/Symptoms: One or both headlights fail to illuminate * Solution: Replace headlight bulbs or wiring harness * Estimated Cost to Fix: $50 - $200+ * Recalls: None Found

Exterior

• Rust Prone: * Description/Symptoms: Rust develops on body panels, especially around wheel wells and undercarriage * Solution: Apply rust treatment, prevent further damage * Estimated Cost to Fix: $200 - $1,000+ * Recalls: None Found
• Tailgate Damage: * Description/Symptoms: Tailgate becomes misaligned or damaged due to heavy use * Solution: Repair or replace tailgate * Estimated Cost to Fix: $500 - $1,500+ * Recalls: None Found

Interior

• Dashboard Cracking: * Description/Symptoms: Dashboard material cracks or fades * Solution: Replace dashboard * Estimated Cost to Fix: $1,000 - $2,000+ * Recalls: None Found
• Power Window Failure: * Description/Symptoms: Power windows become inoperable * Solution: Replace window motors or switches * Estimated Cost to Fix: $200 - $500+ * Recalls: None Found

Summary: The 2004 GMC T7500 is a capable heavy-duty truck with impressive engine options. However, it has encountered some issues that can be costly to repair, including fuel injector failure, transmission problems, and rust. The severity of these issues varies, and some can lead to significant downtime or safety concerns. Before purchasing a used T7500, potential buyers are advised to thoroughly inspect the vehicle for these known issues and consider the potential repair costs.