2000 CHEVROLET EXPRESS

Typical onset: 120,000-180,000 mi

Symptoms: excessive oil consumption (1+ quart per 500 miles), blue smoke on startup, knocking or rod knock at idle, sudden loss of compression, metal shavings in oil

Fix: Complete engine rebuild or replacement required. Piston ring failure allows oil into combustion chambers, leading to carbon buildup and eventual bearing failure. Rebuild takes 18-24 hours labor including removal, machine work, and reinstall. Many opt for reman or junkyard engine swap instead.

Estimated cost: $3,500-6,500

Typical onset: 80,000-130,000 mi

Symptoms: coolant loss with no visible leaks, milky oil on dipstick or oil cap, rough idle when cold, white exhaust smoke, overheating

Fix: The plastic composite intake gasket deteriorates, allowing coolant into the crankcase or causing external leaks. Requires intake manifold removal, gasket replacement with updated metal-reinforced design, and thorough coolant/oil system flush. 5-7 hours labor.

Estimated cost: $800-1,400

Typical onset: 90,000-150,000 mi

Symptoms: transmission fluid puddles under vehicle, pink fluid dripping near radiator, transmission slipping or delayed engagement, overheating transmission, rapid fluid loss

Fix: Steel cooler lines rust through at bends and mounting points, especially in salt-belt states. Catastrophic when lines fail completely, leaving transmission without fluid. Replace both lines preventively, not just the leaking one. 2-3 hours labor plus fluid refill.

Estimated cost: $350-650

Typical onset: 150,000-200,000 mi

Symptoms: harsh 1-2 shift, slipping between gears under load, no reverse or intermittent reverse, transmission won't shift out of 2nd gear, burnt fluid smell

Fix: The 4L60E (behind smaller engines) is notorious for valve body wear, sun shell breakage, and clutch pack failure. The heavier-duty 4L80E lasts longer but still fails from abuse or lack of fluid changes. Rebuild or replacement takes 8-12 hours labor. Many recommend going straight to a remanufactured unit.

Estimated cost: $2,200-3,800

Typical onset: 100,000-160,000 mi

Symptoms: no-start condition with cranking, stalling at idle or under acceleration, loss of power uphill, whining noise from fuel tank, hard starting when hot

Fix: Fuel pump fails inside the tank, requiring tank drop on these large-capacity tanks (often 31+ gallons). The job is labor-intensive on loaded cargo vans. Replace fuel filter simultaneously (frame-mounted). 3-5 hours labor depending on tank access.

Estimated cost: $600-1,100

Symptoms: check engine light P0440/P0442, fuel smell near tank, hissing when opening gas cap, difficulty fueling (pump clicks off repeatedly)

Fix: EVAP vent solenoid and canister purge valve fail frequently. Fuel tank pressure sensor also problematic. Start with gas cap replacement ($25), then diagnose with smoke test. Vent valve replacement is accessible, 1-2 hours. Canister replacement requires dropping tank, 3-4 hours.

Estimated cost: $150-700

Typical onset: 80,000-140,000 mi

Symptoms: power steering fluid leaks at hose connections, groaning noise when turning, stiff steering at low speeds, fluid on frame rails or ground, low fluid warning

Fix: High-pressure hoses crack at crimps and connections (recall-related). Pump seals also leak on high-mileage units. Replace pressure and return hoses together, flush system. Pump replacement adds 2 hours. Basic hose job is 1.5-2 hours labor.

Estimated cost: $300-800

Typical onset: 100,000-150,000 mi

Symptoms: random misfires on all cylinders, no-start with no spark, rough running and backfiring, stalling after warm-up, tachometer bouncing or dead

Fix: Distributor shaft bushings wear, causing ignition timing drift and misfires. Optical sensor also fails. Replacement requires timing reset. Use AC Delco or quality aftermarket only—cheap units fail within months. 1.5-2 hours labor.

Estimated cost: $250-500