2015 CHEVROLET SILVERADO 1500

Typical onset: 80,000-150,000 mi

Symptoms: Ticking or tapping noise from valve train, especially cold start, Check engine light with P0300-P0308 misfire codes or P0521 oil pressure, Reduced power, rough idle, possible valve train collapse, Metal shavings in oil, valve lifter fragments on magnetic drain plug

Fix: AFM lifters collapse due to oil starvation and poor design. Requires cam replacement, all 16 lifters, pushrods inspection, and often AFM delete kit installation to prevent recurrence. 18-24 labor hours for full cam/lifter job. Many shops now recommend proactive AFM disable tune on high-mileage examples.

Estimated cost: $3,500-6,000

Typical onset: 60,000-120,000 mi

Symptoms: Transmission fluid leaking at radiator-mounted cooler connections, Pink or milky transmission fluid (coolant cross-contamination), Transmission slipping, delayed engagement, or complete failure, Low transmission fluid level, overheating warnings

Fix: Factory crimp-style cooler lines crack at the radiator quick-connect fittings. If coolant mixes into trans, the 6L80 is often toast. Flush immediately if caught early. Full fix requires cooler lines, external cooler recommended, transmission flush. If contaminated: transmission rebuild. 3-4 hours for lines/flush, 12-16 for transmission R&R.

Estimated cost: $400-800 (lines/flush), $2,800-4,500 (rebuild)

Typical onset: 100,000-180,000 mi

Symptoms: Excessive oil consumption (1 quart per 500-1,000 miles), Blue smoke from exhaust on startup or acceleration, Loss of compression, misfire codes, Spark plugs fouled with carbon and oil

Fix: Direct injection carbon buildup and thermal stress crack piston ring lands, especially on cylinders 1 and 7. Requires complete engine disassembly, new pistons, rings, honing, often head work. 28-35 labor hours for full rebuild. Some owners opt for reman short block instead.

Estimated cost: $5,500-8,500

Typical onset: 70,000-130,000 mi

Symptoms: Hard brake pedal, increased pedal effort required, Hissing noise from engine bay, Check engine light with P0231 or vacuum-related codes, Brake warning light illuminated

Fix: Electric vacuum pump for brake booster fails due to internal diaphragm wear or motor burnout. Part is on driver side of engine. Replacement is straightforward: 1.5-2.5 labor hours. NHTSA recall covered some, check VIN eligibility before paying.

Estimated cost: $350-650

Typical onset: 50,000-100,000 mi

Symptoms: Check engine light with P0449 or P0455 EVAP codes, Fuel tank difficult to fill, pump clicks off repeatedly, Hissing sound near fuel tank when refueling, Fuel smell around rear of truck

Fix: Vent valve solenoid above spare tire fails from corrosion and heat cycling. Simple replacement, 0.8-1.2 labor hours. Common enough that many techs check it first on any EVAP code.

Estimated cost: $180-320

Symptoms: Sudden loss of power steering assist while driving, Service power steering message on instrument cluster, Heavy steering effort, especially at low speeds, Intermittent assist that comes and goes

Fix: EPS motor or control module failure. GM issued TSB and recall on some VINs for software update, but hardware failures still occur. Requires column-mounted motor replacement or module reflash. 2.5-4 hours labor depending on diagnosis.

Estimated cost: $200-450 (reflash), $1,200-1,800 (motor)