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2017 CHEVROLET COLORADO ZR2

3.6L V6•4WD•AUTOMATIC•gas
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5-Year Cost of Ownership
$15,274 maintenance + known platform issues
~$3,055/yr · 250¢/mile equivalent · $6,220 maintenance + $7,854 expected platform issues
Compare this engine
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Common Problems & Known Issues

The 2017 Colorado ZR2 is a capable midsize off-road truck, but the 2.8L Duramax diesel has earned a troubling reputation for catastrophic engine failures due to crankshaft and bearing issues, while the 3.6L V6 is considerably more reliable with primarily transmission-related concerns.

Duramax 2.8L Catastrophic Engine Failure (Crankshaft/Bearing Failure)

Occasional · high severity
Typical onset: 80,000-150,000 mi
Symptoms: Metallic knocking from lower engine, Loss of oil pressure, Check engine light with bearing-related codes, Metal shavings in oil, Sudden engine seizure in worst cases
Fix: Complete engine replacement or full rebuild required. Crankshaft journals wear prematurely, wiping out main and rod bearings. We're seeing 40-60 hours for a full rebuild with machine work, or 20-25 hours for a reman long block swap. This is the diesel's Achilles heel.
Estimated cost: $8,000-15,000

8-Speed Automatic Transmission Oil Cooler Line Failure

Common · medium severity
Typical onset: 60,000-100,000 mi
Symptoms: Transmission fluid leaking near radiator, Pink fluid pooling under front of truck, Burnt transmission fluid smell, Harsh shifting after fluid loss
Fix: Factory cooler lines corrode where they connect to the radiator. Replace both lines and flush the system. 2-3 hours labor. Often caught early during oil changes if you're looking for it.
Estimated cost: $400-700

Transmission Mount Failure

Common · medium severity
Typical onset: 70,000-120,000 mi
Symptoms: Clunking when shifting from Park to Drive, Excessive drivetrain vibration, Visible transmission sag or movement, Harsher shift quality
Fix: The rubber isolator in the transmission mount deteriorates faster than expected, especially on trucks that see off-road duty. Replace the mount assembly, 1.5-2 hours labor. Check both engine and transmission mounts at the same time.
Estimated cost: $250-450

Diesel Fuel Filter Housing Leak

Occasional · medium severity
Typical onset: 50,000-90,000 mi
Symptoms: Fuel odor in cabin or around truck, Visible diesel weeping from filter housing, Hard starting when cold, Fuel system pressure codes
Fix: The fuel filter housing develops cracks or the water-in-fuel sensor O-rings fail. Replace the entire housing assembly and prime the system. 1.5-2 hours labor. Use OEM parts—aftermarket housings crack even faster.
Estimated cost: $300-600

Diesel Piston Ring Wear and Blow-by

Occasional · high severity
Typical onset: 100,000-180,000 mi
Symptoms: Excessive crankcase pressure, Oil consumption increasing, Blue smoke on startup or acceleration, Reduced power, Failed emissions testing
Fix: Ring lands crack or rings lose tension, causing compression loss and oil burning. Requires engine disassembly, new pistons and rings, cylinder honing. 35-50 hours for a proper in-frame overhaul. Often discovered during diagnosis for the crankshaft issues.
Estimated cost: $6,000-10,000

3.6L V6 Cylinder Head Gasket Seepage

Rare · medium severity
Typical onset: 120,000-180,000 mi
Symptoms: Minor coolant loss with no visible leaks, White residue on engine block near head, Sweet smell from engine bay, Slight overheating under heavy load
Fix: The V6 can develop minor head gasket seepage at high mileage. Both heads should be done if you're in there. 12-16 hours labor. This engine is generally solid—when gaskets fail, it's usually a slow weep, not catastrophic.
Estimated cost: $2,200-3,500
Owner tips
  • If buying a diesel, get a pre-purchase oil analysis and borescope inspection—bearing wear shows up in oil samples before the engine grenades
  • Change transmission fluid at 50k intervals, not the 'lifetime' GM claims—especially if you tow or off-road
  • Diesel fuel filter service every 15k miles religiously, and use quality fuel—injector failures from bad fuel are expensive
  • The 3.6L V6 is the safer bet for reliability if you don't need the diesel torque
Buy the V6 without hesitation; avoid the 2.8L diesel unless you have detailed service records and a recent oil analysis showing clean bearings—too many grenaded engines in the 100k-mile range.
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.

Labor Times — 2017 Chevrolet Colorado ZR2

499 jobs across 17 categories

body (34)

brakes (44)

cooling (21)

drivetrain (34)

electrical (75)

engine (68)

exhaust (22)

hvac (23)

interior (24)

maintenance (31)

suspension (35)

transmission (42)

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