1990 GMC P60

The 1990 GMC P60 is a heavy-duty pickup truck with a powerful V8 engine and a robust suspension system. It is known for its impressive hauling and towing capabilities. However, like any vehicle, it has some issues that owners have reported over the years.

Engine

7.4L V8 (340 hp/455 lb-ft)

• Cylinder head gasket failure: Symptoms include overheating, oil leaking from the head gasket area, and white smoke from the exhaust. Solution: Replace the head gasket. Estimated Cost to Fix: $1,000 - $2,000+
• Intake manifold gasket leak: Symptoms include a rough idle, loss of power, and a whistling noise from the engine. Solution: Replace the intake manifold gasket. Estimated Cost to Fix: $300 - $600+
• Fuel pump failure: Symptoms include difficulty starting, stalling, and a loss of power while driving. Solution: Replace the fuel pump. Estimated Cost to Fix: $400 - $800+
• Oxygen sensor failure: Symptoms include poor fuel economy, rough idle, and an illuminated check engine light. Solution: Replace the oxygen sensor. Estimated Cost to Fix: $200 - $400+

Transmission

4L80-E Automatic (3-speed)

• Slipping gears: Symptoms include delayed engagement, rough shifting, and a loss of power. Solution: Rebuild or replace the transmission. Estimated Cost to Fix: $2,000 - $4,000+

Suspension

• Front suspension wear: Symptoms include excessive vibration, a loose steering wheel, and uneven tire wear. Solution: Replace worn suspension components (such as ball joints, tie rods, and shocks). Estimated Cost to Fix: $500 - $1,500+
• Rear axle seal leak: Symptoms include leaking fluid from the rear axle area. Solution: Replace the axle seal. Estimated Cost to Fix: $200 - $500+
• Leaf spring failure: Symptoms include a sagging or bouncy ride, and difficulty aligning the tires. Solution: Replace the leaf springs. Estimated Cost to Fix: $500 - $1,000+

Electrical

• Alternator failure: Symptoms include a flickering dashboard, dim headlights, and a dead battery. Solution: Replace the alternator. Estimated Cost to Fix: $500 - $1,000+
• Starter failure: Symptoms include a clicking sound when starting, a grinding noise, or no response when turning the key. Solution: Replace the starter. Estimated Cost to Fix: $300 - $600+
• Wiring harness issues: Symptoms can vary depending on the affected circuit, but may include electrical malfunctions, short circuits, and even fires. Solution: Repair or replace the damaged wiring harness. Estimated Cost to Fix: $200 - $2,000+

Exterior

• Rusty body panels: Symptoms include visible rust spots, flaking paint, and holes in the metal. Solution: Repair or replace the affected panels. Estimated Cost to Fix: $1,000 - $5,000+

Interior

• Dashboard cracking: Symptoms include visible cracks on the dashboard surface. Solution: Replace the dashboard. Estimated Cost to Fix: $500 - $1,200+
• Seat upholstery tearing: Symptoms include rips and tears in the seat fabric or leather. Solution: Repair or replace the seat upholstery. Estimated Cost to Fix: $200 - $800+
• Climate control issues: Symptoms can vary depending on the problem, but may include poor heating or cooling performance, or malfunctioning controls. Solution: Repair or replace the affected components. Estimated Cost to Fix: $300 - $1,500+

Summary

The 1990 GMC P60 is a reliable and capable pickup truck. However, it is not without its issues. Some of the most common problems reported by owners include engine gasket failures, transmission issues, electrical problems, and rust on the body panels. While some of these issues can be costly to fix, many are relatively minor and can be addressed with routine maintenance. Overall, the P60 is a solid choice for those who need a heavy-duty truck with a proven track record of performance and durability.