2002 GMC B7

The 2002 GMC B7 is a popular cutaway van chassis often used for shuttle buses, school buses, and recreational vehicles. It’s known for its robust construction and reliability, making it a workhorse in various applications. Engine options for the 2002 GMC B7 include the 5.7L Vortec V8 (255 hp, 330 lb-ft of torque) and the 7.4L Vortec V8 (290 hp, 410 lb-ft of torque). Common complaints regarding the 2002 GMC B7 include its age-related issues, fuel economy, and the need for regular maintenance due to its heavy-duty usage. People appreciate its durability, simple design, and the availability of parts.

Engine

5.7L Vortec V8

• Intake Manifold Gasket Failure
  • Description/Symptoms: Coolant leaks, overheating, rough idle, and white smoke from the exhaust.
  • Solution: Replacement of the intake manifold gasket with an updated design.
  • Estimated Cost to Fix: $400 - $800+
  • Recalls: None Found
• Fuel Injector Issues
  • Description/Symptoms: Misfires, poor fuel economy, rough idling, and a check engine light (CEL) with codes related to fuel injectors.
  • Solution: Replacement of faulty fuel injectors. It’s often recommended to replace all injectors at the same time for even performance.
  • Estimated Cost to Fix: $200 - $600+
  • Recalls: None Found

7.4L Vortec V8

• Oil Leaks
  • Description/Symptoms: Oil leaks from the valve cover gaskets, oil pan gasket, and rear main seal. Visible oil drips and a burning oil smell are common.
  • Solution: Replacing the leaking gaskets and seals.
  • Estimated Cost to Fix: $100 - $400+ per gasket/seal
  • Recalls: None Found

Transmission

4L80E Automatic Transmission (Common to both 5.7L and 7.4L engines)

• Slipping or Harsh Shifting
  • Description/Symptoms: The transmission may slip between gears, have harsh or delayed shifts, or fail to shift at all.
  • Solution: Diagnosis and repair of the transmission, which may involve replacing the valve body, shift solenoids, or rebuilding the transmission.
  • Estimated Cost to Fix: $300 - $3000+ depending on the extent of the damage.
  • Recalls: None Found
• Torque Converter Failure
  • Description/Symptoms: Shuddering or vibrations at low speeds, especially when accelerating. Stalling may also occur.
  • Solution: Replacement of the torque converter.
  • Estimated Cost to Fix: $500 - $1500+
  • Recalls: None Found

Suspension

• Worn Ball Joints and Tie Rod Ends
  • Description/Symptoms: Clunking noises from the front suspension, loose steering, uneven tire wear, and vibrations.
  • Solution: Replacement of worn ball joints and tie rod ends.
  • Estimated Cost to Fix: $200 - $600+ per side
  • Recalls: None Found
• Leaf Spring Sagging or Breakage
  • Description/Symptoms: Rear end sagging, poor ride quality, and potential instability.
  • Solution: Replacement of leaf springs, possibly with upgraded, heavier-duty versions.
  • Estimated Cost to Fix: $300 - $1000+ per side
  • Recalls: None Found

Electrical

• Alternator Failure
  • Description/Symptoms: Dimming headlights, a dead battery, and warning lights on the dashboard.
  • Solution: Replacement of the alternator.
  • Estimated Cost to Fix: $200 - $500+
  • Recalls: None Found
• Wiring Harness Issues
  • Description/Symptoms: Intermittent electrical problems, such as malfunctioning lights, sensors, or accessories. Corrosion and damage to the wiring harness are common.
  • Solution: Repair or replacement of the affected wiring harness sections.
  • Estimated Cost to Fix: $100 - $1000+ depending on the complexity
  • Recalls: None Found

Exterior

• Rust Issues
  • Description/Symptoms: Rust forming on the body panels, especially around the wheel wells, rocker panels, and frame.
  • Solution: Rust repair, including cutting out rusted sections and welding in new metal. Prevention measures like rustproofing are recommended.
  • Estimated Cost to Fix: $200 - $2000+ depending on severity
  • Recalls: None Found

Interior

• HVAC Blower Motor Failure
  • Description/Symptoms: The blower motor stops working, resulting in no airflow from the vents.
  • Solution: Replacement of the blower motor.
  • Estimated Cost to Fix: $100 - $300+
  • Recalls: None Found

Summary

The 2002 GMC B7, while a robust and reliable platform, is prone to age-related issues common in vehicles of its era. These issues range from relatively inexpensive fixes like replacing blower motors and gaskets to more costly repairs such as transmission overhauls or rust repair. The severity and cost of repairs depend heavily on the vehicle’s maintenance history and overall condition. Pre-purchase inspections are recommended to identify any potential problems and estimate repair costs accurately. The issues identified are of varying severity, with rust and transmission problems being the most concerning due to the potential for high repair costs and impact on the vehicle’s safety and reliability.