The 2014 Chevrolet S10 is a Brazilian-market midsize pickup that never sold in North America, but shares DNA with the Colorado platform. The 2.5L flex-fuel gas engine is agricultural but durable; the 2.8L Duramax diesel is torquey but suffers from EGR and injector problems common to that generation.
2.8L Duramax EGR Valve & Cooler Fouling
Common · medium severityTypical onset: 60,000-100,000 mi
Symptoms: rough idle and black smoke at startup, CEL for P0401 insufficient EGR flow, limp mode or power loss under load, coolant loss with no external leaks (cracked EGR cooler)
Fix: Clean or replace EGR valve, replace EGR cooler if leaking internally, intake manifold removal required. 4-6 hours labor depending on cooler involvement. Many shops now delete and tune where legal.
Estimated cost: $800-1,800
2.8L Duramax Injector Failure
Occasional · high severityTypical onset: 80,000-140,000 mi
Symptoms: hard start or long crank, especially cold, white smoke and fuel smell from exhaust, misfires on one or more cylinders, fuel dilution in oil (check dipstick level rising)
Fix: Replace failed injector(s), often see multiple failures once one goes. Requires injector coding/programming. 3-5 hours per injector depending on access. If caught late, may need engine teardown for bearing damage from fuel dilution.
Estimated cost: $1,200-2,500
2.5L Flex-Fuel Lifter Collapse & Camshaft Wear
Occasional · high severityTypical onset: 100,000-150,000 mi
Symptoms: ticking or tapping noise from valve train, worsens when hot, loss of power and rough running, CEL for multiple misfires, metal shavings in oil
Fix: Replace all lifters and inspect camshaft lobes for wear; frequently requires cam replacement due to scoring. Cylinder head removal necessary. 12-16 hours labor for cam/lifter job. Often discover damaged valve springs or guides once head is off.
Estimated cost: $2,800-4,500
Transmission Oil Cooler Line Leaks
Common · medium severityTypical onset: 70,000-120,000 mi
Symptoms: transmission fluid puddles under vehicle, burnt smell from fluid contacting exhaust, low fluid level leading to slipping or delayed shifts, fluid spraying onto undercarriage
Fix: Replace corroded steel cooler lines, often both feed and return. Lines run along frame and rust through from road salt and debris. 2-3 hours labor, straightforward once vehicle is on lift.
Estimated cost: $400-700
Harmonic Balancer Separation (2.5L)
Occasional · high severityTypical onset: 90,000-140,000 mi
Symptoms: severe vibration at idle and low RPM, serpentine belt walking off or shredding, wobbling pulley visible with engine running, rattling or knocking from front of engine
Fix: Replace harmonic balancer when rubber damper ring separates from hub. Requires balancer puller tool and careful inspection of crankshaft nose for damage. 2-3 hours labor. Do NOT drive once wobble is noticed—can damage crank snout.
Estimated cost: $450-800
Transmission Mount Failure
Common · low severityTypical onset: 60,000-100,000 mi
Symptoms: clunking when shifting from park to drive/reverse, excessive vibration through cabin at idle, visible sagging of transmission tailshaft, shifter feels notchy or catches
Fix: Replace rubber transmission mount, sometimes called transmission crossmember mount. Rubber deteriorates from heat and oil exposure. 1-1.5 hours labor, requires supporting transmission with jack.
Estimated cost: $200-350
Head Gasket Failure (2.5L Flex)
Occasional · high severityTypical onset: 120,000-180,000 mi
Symptoms: coolant loss with no visible leaks, white smoke from exhaust on startup, overheating under load, oil cap shows milky residue, bubbles in coolant reservoir with engine running
Fix: Replace head gasket, resurface cylinder head if warped (common). Often find corroded head bolt threads requiring Heli-Coil inserts. 10-14 hours labor including head resurface at machine shop. Always pressure test after assembly.
Estimated cost: $1,800-3,200
Solid workhorse truck if maintained, but the 2.8L Duramax is high-maintenance past 80k miles; the 2.5L gas is slower but cheaper to keep alive—budget $1,500/year in repairs after 100k regardless of engine choice.
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.