2003 GMC W5500 Forward

Introduction to the 2003 GMC W5500 Forward

The 2003 GMC W5500 Forward is a heavy-duty pickup truck available with a variety of engine and transmission options. The base engine is a 6.6L Duramax diesel V8 that produces 300 horsepower and 520 lb-ft of torque. A 7.8L Vortec V8 gasoline engine is also available, producing 340 horsepower and 455 lb-ft of torque. Transmission options include a 6-speed manual, 5-speed Allison automatic, and a 6-speed Allison automatic.

Owners of the W5500 Forward generally praise its powerful engines, capable towing and hauling abilities, and comfortable interior. However, some have reported issues with certain components.

Engine

6.6L Duramax Diesel V8

• Fuel Injector Failure
  • Description/Symptoms: Engine misfires, rough idling, reduced power
  • Solution: Replace fuel injectors
  • Estimated Cost to Fix: $1200 - $2000+
  • Recalls: N/A
• Turbocharger Failure
  • Description/Symptoms: Loss of power, excessive smoke, whining noise
  • Solution: Replace turbocharger
  • Estimated Cost to Fix: $1500 - $2500+
  • Recalls: N/A

7.8L Vortec V8 Gasoline

• Intake Manifold Gasket Failure
  • Description/Symptoms: Coolant or oil leaks, engine overheating
  • Solution: Replace intake manifold gasket
  • Estimated Cost to Fix: $500 - $1000+
  • Recalls: N/A

Transmission

6-Speed Manual

• Clutch Failure
  • Description/Symptoms: Difficulty shifting gears, slipping gears, grinding noises
  • Solution: Replace clutch
  • Estimated Cost to Fix: $800 - $1500+
  • Recalls: N/A

5-Speed Allison Automatic

• Torque Converter Failure
  • Description/Symptoms: Transmission slipping, shuddering, overheating
  • Solution: Replace torque converter
  • Estimated Cost to Fix: $1500 - $2500+
  • Recalls: N/A

6-Speed Allison Automatic

• No Issues Found

Suspension

• Leaf Spring Failure
  • Description/Symptoms: Sagging rear end, rough ride, clunking noises
  • Solution: Replace leaf springs
  • Estimated Cost to Fix: $500 - $1200+
  • Recalls: N/A

Electrical

• Alternator Failure
  • Description/Symptoms: Dim headlights, flickering electronics, battery not charging
  • Solution: Replace alternator
  • Estimated Cost to Fix: $300 - $600+
  • Recalls: N/A

Exterior

• Headlight Switch Failure
  • Description/Symptoms: Headlights not working, intermittent operation
  • Solution: Replace headlight switch
  • Estimated Cost to Fix: $100 - $200+
  • Recalls: N/A

Interior

• Dashboard Trim Panel Vibration
  • Description/Symptoms: Plastic trim panels on the dashboard vibrate at certain speeds
  • Solution: Secure or replace trim panels
  • Estimated Cost to Fix: $100 - $300+
  • Recalls: N/A

Summary

The 2003 GMC W5500 Forward is a capable work truck that offers impressive performance and durability. However, it has some potential issues to watch out for, including fuel injector failure, turbocharger failure, clutch failure, and torque converter failure. The severity and cost of these issues vary, so it’s important to have the vehicle inspected by a qualified mechanic before purchasing and to stay up-to-date on maintenance.