1999 GMC W4500 Forward
Introduction:
The 1999 GMC W4500 Forward is a commercial-grade work truck designed for heavy-duty applications. It features a spacious cabin and comes equipped with a powerful Vortec 8100 350-hp 565 lb-ft V8 engine paired with an Allison HD3060 6-speed automatic transmission. With a gross vehicle weight rating (GVWR) of 44,800 lbs, this truck offers impressive towing and hauling capabilities. However, like any vehicle, the 1999 GMC W4500 Forward has faced its share of issues that drivers should be aware of.
Engine
Vortec 8100 350-hp 565 lb-ft V8
Intake Manifold Gasket Failure:
- Description/Symptoms: Coolant and/or oil leak, overheating, engine performance loss
- Solution: Replace intake manifold gasket
- Estimated Cost to Fix: $500 - $1,000+
- Recalls: None Found
Transmission
Allison HD3060 6-Speed Automatic
Transmission Slipping:
- Description/Symptoms: Difficulty shifting gears, delayed engagement, loss of power
- Solution: Overhaul or replace transmission
- Estimated Cost to Fix: $1,500 - $3,500+
- Recalls: None Found
Suspension
Front Leaf Springs:
- Description/Symptoms: Sagging, uneven tire wear, reduced steering stability
- Solution: Replace leaf springs
- Estimated Cost to Fix: $300 - $800+
- Recalls: None Found
Electrical
Alternator Failure:
- Description/Symptoms: Dim headlights, battery warning light illuminated, loss of electrical power
- Solution: Replace alternator
- Estimated Cost to Fix: $300 - $700+
- Recalls: None Found
Interior
Cruise Control Switch Failure:
- Description/Symptoms: Cruise control not engaging or functioning intermittently
- Solution: Replace cruise control switch
- Estimated Cost to Fix: $200 - $400+
- Recalls: None Found
Exterior
Headlight Switch Failure:
- Description/Symptoms: Headlights not turning on or flickering
- Solution: Replace headlight switch
- Estimated Cost to Fix: $100 - $300+
- Recalls: None Found
Summary:
The 1999 GMC W4500 Forward is a capable and durable work truck that has earned a reputation for reliability. However, like any vehicle, it has its fair share of issues. The most common problems reported by owners include intake manifold gasket failure, transmission slipping, alternator failure, and headlight switch failure. While these issues can be costly to repair, they are generally not severe and can be resolved with proper maintenance and attention.