2018 GMC Savana 3500

The 2018 GMC Savana 3500 is a full-size cargo and passenger van known for its robust build and utility. It’s often used for commercial purposes like transporting goods, passengers, or serving as a mobile workshop. Available engine options include the standard 4.3L V6 (276 hp, 298 lb-ft of torque), the more powerful 6.0L V8 (341 hp, 373 lb-ft of torque), and a 2.8L Duramax Turbo-Diesel (181 hp, 369 lb-ft of torque). The transmission options were a 6-speed automatic on the gasoline engines and an 8-speed automatic on the Diesel engine. Owners typically appreciate the Savana’s spaciousness, payload capacity, and towing capability. Common complaints revolve around the dated design, fuel economy, and ride quality.

Engine

4.3L V6

• No Issues Found

6.0L V8

• Active Fuel Management (AFM) Lifter Failure
  • Description/Symptoms: Engine misfires, rough running, and potential engine damage due to a failed AFM lifter collapsing. This usually triggers the check engine light.
  • Solution: Replace the failed lifters, often requiring removal of the cylinder head. Some owners opt to delete the AFM system entirely to prevent future issues.
  • Estimated Cost to Fix: $2,000 - $4,000+
  • Recalls: None Found
• Oil Consumption
  • Description/Symptoms: Excessive oil consumption that requires frequent oil additions. Blue smoke may be visible from the exhaust, especially on startup.
  • Solution: Determining the cause of consumption is key. Piston rings, PCV valve, or valve stem seals can be the culprit and will require replacement to resolve the issue.
  • Estimated Cost to Fix: $500 - $5,000+ depending on the cause and repair needed.
  • Recalls: None Found

2.8L Duramax Turbo-Diesel

• Diesel Exhaust Fluid (DEF) System Issues
  • Description/Symptoms: Check engine light related to DEF system malfunctions. These can include faulty DEF sensors, a malfunctioning DEF injector, or a clogged DEF filter. Reduced engine power or a speed limiter may also be activated.
  • Solution: Diagnose the specific component failure in the DEF system using a scan tool and replace the faulty part. Cleaning or replacing the DEF filter may also be necessary.
  • Estimated Cost to Fix: $200 - $1,500+ depending on the component.
  • Recalls: None Found

Transmission

6L80 6-Speed Automatic (paired with 4.3L and 6.0L)

• Harsh Shifting/Slipping
  • Description/Symptoms: The transmission may exhibit harsh or erratic shifting, particularly between certain gears. Slipping during acceleration or delayed engagement can also occur.
  • Solution: Initially, check the transmission fluid level and condition. A fluid flush and filter replacement may resolve minor issues. If the problem persists, valve body issues are common and require repair or replacement.
  • Estimated Cost to Fix: $150 - $3,500+ depending on severity.
  • Recalls: None Found

8-Speed Automatic (paired with 2.8L Duramax Diesel)

• No Issues Found

Suspension

• Leaf Spring Sagging/Cracking
  • Description/Symptoms: Rear suspension sagging, especially when loaded. Leaf springs may exhibit visible cracking or breakage. This can affect ride quality and handling.
  • Solution: Replace the affected leaf spring(s) with new or reinforced units. Consider upgrading to heavier-duty springs if the vehicle is frequently used for heavy loads.
  • Estimated Cost to Fix: $300 - $800+ per spring, depending on the source and type.
  • Recalls: None Found

Electrical

• Door Lock Actuator Failure
  • Description/Symptoms: Intermittent or complete failure of the door lock actuator, preventing the door from locking or unlocking electronically.
  • Solution: Replace the faulty door lock actuator.
  • Estimated Cost to Fix: $150 - $350+ per door.
  • Recalls: None Found
• Battery Drain
  • Description/Symptoms: The battery drains rapidly, often overnight, preventing the vehicle from starting.
  • Solution: Diagnose parasitic drain by testing circuits and fuses. Potential causes include faulty aftermarket accessories, a failing alternator, or a short circuit in the wiring harness.
  • Estimated Cost to Fix: $100 - $500+ depending on the cause.
  • Recalls: None Found

Exterior

• Side Door Latch Malfunction
  • Description/Symptoms: Difficulties opening or closing the sliding side door. The latch mechanism may become stiff or require excessive force to operate.
  • Solution: Lubricate the latch mechanism with silicone-based lubricant. If the problem persists, the latch assembly may need replacement.
  • Estimated Cost to Fix: $50 (lubrication) - $300+ (latch replacement).
  • Recalls: None Found

Interior

• HVAC Blower Motor Failure
  • Description/Symptoms: The HVAC blower motor stops working, resulting in no airflow from the vents. This can affect heating, ventilation, and air conditioning.
  • Solution: Replace the faulty blower motor.
  • Estimated Cost to Fix: $150 - $400+
  • Recalls: None Found

Summary The 2018 GMC Savana 3500, while a dependable work van, can be susceptible to certain issues. The most significant concerns revolve around the 6.0L V8 engine’s AFM lifter failures and oil consumption, which can result in costly repairs. Other issues, like DEF system problems on the diesel model and electrical malfunctions, are generally less severe but still require attention. Addressing these potential problems promptly can help maintain the vehicle’s reliability and extend its lifespan.