2024 CHEVROLET BLAZER

Typical onset: 40,000-80,000 mi

Symptoms: Sudden excessive oil consumption (1qt per 500-1000 mi), Blue smoke from exhaust on cold starts, Check engine light with misfire codes (P0300-P0304), Metallic knocking from crankcase, Complete loss of compression in one or more cylinders

Fix: This is GM's LSY engine defect—piston ring land cracks or skirt failures cause scoring and oil burning. Requires complete short block replacement or full engine rebuild with updated pistons. Book time is 18-22 hours for engine removal, teardown, rebuild, and reinstall. Some dealers replace entire long block.

Estimated cost: $8,000-12,000

Typical onset: 50,000-90,000 mi

Symptoms: Transmission fluid leaking near radiator or cooler lines, Harsh 2-3 or 3-4 shifts, Slipping between gears under moderate throttle, Shuddering at 30-50 mph during light acceleration, Check engine light with solenoid or pressure codes

Fix: The 9T50 transmission cooler lines develop pinhole leaks, and internal clutch packs wear prematurely due to inadequate fluid cooling. Cooler line replacement is 2-3 hours, but if internal damage occurred from running low on fluid, expect full rebuild or replacement at 12-16 hours labor.

Estimated cost: $400-800 for lines only, $4,500-6,500 for rebuild/replacement

Typical onset: 60,000-100,000 mi

Symptoms: Harsh clunk when shifting from Park to Drive or Reverse, Vibration at idle with transmission in gear, Excessive engine movement visible when accelerating hard, Rattling over bumps from engine bay

Fix: The hydraulic transmission mount fails early due to heat from turbo proximity on 2.0T models. Rubber separates and fluid leaks internally. Replacement is straightforward but requires supporting the powertrain—2.5 hours book time including alignment.

Estimated cost: $350-550

Typical onset: 70,000-110,000 mi

Symptoms: Hard starting after sitting overnight, Sputtering or hesitation during acceleration, Stalling at idle or when coming to stops, Check engine light with fuel trim or low-pressure codes (P0087, P0089), Fuel smell near tank area

Fix: GM's lift pump in the tank clogs or the pre-filter disintegrates, starving the high-pressure pump. Requires tank drop, pump module replacement, and often fuel filter replacement. 3-4 hours labor, more if lines are corroded.

Estimated cost: $800-1,400

Symptoms: Door won't latch securely, requires slamming multiple times, Power locks cycle repeatedly on their own, Door ajar warning stays illuminated, Unable to lock or unlock door from inside or key fob, Door won't open from inside handle

Fix: Cheap latch assemblies fail internally—plastic gears strip or actuator motors burn out. NHTSA has one recall for door structure but latch failures continue beyond recall scope. Replacement requires door panel removal and latch calibration—2 hours per door.

Estimated cost: $400-650 per door

Typical onset: 80,000-120,000 mi

Symptoms: Gradual coolant loss with no visible external leaks, White residue around head gasket areas, Slight sweet smell from exhaust, Engine overheating under sustained load, Oil appears milky or frothy on dipstick in severe cases

Fix: GM's LGX V6 can develop head gasket weeping between coolant passages and combustion chambers. Catch it early and you're looking at gasket replacement on both banks—12-14 hours labor. If ignored, cylinder head warping requires machining or replacement, pushing labor to 18+ hours.

Estimated cost: $2,500-3,800 for gaskets, $5,000-7,500 if heads need work