The 2016 Express is built on GM's ancient but proven full-size van platform—solid bones, but showing its age with aging fuel system components, transmission cooling issues, and AFM-related engine problems on V8s. Work vans rack up miles fast, so expect higher-mileage maintenance earlier than typical passenger vehicles.
Active Fuel Management (AFM) Lifter Failure on 6.0L V8
Common · high severityTypical onset: 80,000-150,000 mi
Symptoms: Ticking/tapping noise from engine at idle that worsens when warm, Check engine light with P0300-series misfire codes or P0521 oil pressure, Lifter collapse causing valve train damage, Metal shavings in oil on filter inspection
Fix: Requires disabling AFM system and replacing affected lifters, camshaft if damaged, and sometimes valve springs. Range AFM Delete kit plus lifter replacement is 12-16 hours labor. If cam is damaged, add another 6-8 hours. Many shops now proactively disable AFM on these engines.
Estimated cost: $2,800-5,500
Transmission Oil Cooler Line Failure
Common · high severityTypical onset: 70,000-120,000 mi
Symptoms: Transmission fluid leaking from front of vehicle near radiator, Pink/red fluid puddles under engine bay, Transmission overheating warnings or limp mode, Coolant mixing with transmission fluid (strawberry milkshake fluid)
Fix: Steel cooler lines rust through where they connect to radiator or at frame mounting points. Requires replacement of affected lines, often both for preventive measure. If internal radiator cooler failed and contaminated fluid, trans needs full flush or rebuild. Line replacement alone is 2-3 hours labor.
Estimated cost: $400-800 for lines only, $2,500-4,500 if transmission contaminated
Fuel Pump and Fuel Filter Housing Corrosion
Common · medium severityTypical onset: 60,000-100,000 mi
Symptoms: Hard starting after sitting, especially in cold weather, Loss of power under acceleration or uphill, Engine stalling at idle or when hot, Fuel smell from rear of vehicle
Fix: In-tank fuel pump assemblies corrode, especially in rust-belt regions or with ethanol fuel. Pump replacement requires dropping tank (3-4 hours). Fuel filter housing on frame rail also rusts through on 6.0L models. Filter housing replacement adds 1-2 hours.
Estimated cost: $600-1,200
Intake Manifold Gasket Leak (V8 engines)
Occasional · medium severityTypical onset: 90,000-140,000 mi
Symptoms: Coolant loss with no visible external leak, White smoke from exhaust on cold start, Rough idle or misfire when engine is cold, Coolant smell from engine bay
Fix: Plastic intake manifolds develop cracks or gasket failures allowing coolant into cylinders. Requires intake manifold removal and gasket replacement, about 4-6 hours labor. Often find corroded coolant crossover passages that need cleaning or replacement.
Estimated cost: $800-1,400
EVAP Vent Solenoid and Purge Valve Failure
Occasional · low severityTypical onset: 50,000-100,000 mi
Symptoms: Check engine light with P0449, P0496, P0455 codes, Fuel smell near rear of vehicle, Difficulty fueling (pump clicks off repeatedly), Failed emissions test
Fix: EVAP vent valve on top of fuel tank corrodes or sticks. Purge valve on engine also fails. Vent valve requires dropping tank or accessing from inside van (2-3 hours). Purge valve is easier, 0.5-1 hour. Often both need replacement at similar intervals.
Estimated cost: $300-700
Rear Leaf Spring and Shackle Corrosion
Occasional · medium severityTypical onset: null
Symptoms: Sagging rear end, especially when loaded, Clunking noise over bumps from rear suspension, Visible rust on leaf springs or shackles, Uneven tire wear on rear wheels
Fix: Heavy cargo use and road salt cause leaf spring main leafs to crack and shackles to seize or break. Replacement requires removing U-bolts and shackles, often cutting rusted hardware. Per side is 3-4 hours if bolts come out clean, 5-6 hours with rust. Always inspect frame mounts—cracked frames are not uncommon on high-mileage cargo vans.
Estimated cost: $800-1,600 per side
Solid work van if maintained, but AFM lifters on 6.0L V8 and transmission cooler issues are expensive time bombs—buy one with those already addressed or budget $3k-5k for the eventual repairs.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.