2010 CHEVROLET IMPALA

Typical onset: 80,000-150,000 mi

Symptoms: Lifter tick or clatter on cold start that worsens over time, Check engine light with P0300-series misfire codes or P0521 oil pressure, Metal shavings in oil or oil consumption over 1 qt per 1,000 miles, Catastrophic failure: spun bearings, scored cylinders, complete seizure

Fix: AFM lifters collapse, damaging camshaft lobes and sending debris through oiling system. Early catch requires lifter replacement and cam (8-12 hours). Neglected cases need complete engine rebuild or replacement with all bearings, pistons, rings, and machine work (25-35 hours labor). Many shops recommend AFM delete kit during rebuild to prevent recurrence.

Estimated cost: $4,500-8,500

Typical onset: 60,000-120,000 mi

Symptoms: Pink or milky fluid in coolant overflow tank (transmission fluid mixing with coolant), Transmission slipping, delayed engagement, or shuddering, Overheating transmission temp warnings, Coolant loss with no visible external leak

Fix: Factory cooler lines corrode internally where they connect to radiator, allowing coolant into transmission and ATF into cooling system. Requires radiator replacement, complete transmission flush or rebuild if contamination progressed (contaminated fluid destroys clutch packs). Caught early: 3-4 hours for radiator and flush. Late discovery: 12-18 hours for transmission rebuild.

Estimated cost: $800-3,200

Typical onset: 70,000-110,000 mi

Symptoms: Clunk or thud when shifting from park to drive or reverse, Vibration felt through steering wheel at idle in drive, Visible transmission sag when inspecting from underneath, Excessive drivetrain movement during hard acceleration

Fix: Rubber transmission mount deteriorates from heat and age, allowing excessive drivetrain movement. Replacement is straightforward but requires supporting transmission weight. 1.5-2 hours labor. Replace both engine and transmission mounts together to avoid repeat visits.

Estimated cost: $250-450

Typical onset: 90,000-140,000 mi

Symptoms: Clunking over bumps or during turns, Wandering steering or vague handling, Uneven tire wear on inside edges, Play in wheel when checking ball joint (pry bar test)

Fix: Front lower control arm bushings wear and ball joints develop play. GM issued recall for some arm failures but many wear out normally. Most shops replace entire control arm assembly rather than pressing bushings (2-3 hours per side including alignment). Do both sides and alignment together.

Estimated cost: $600-1,000

Symptoms: Key won't turn or gets stuck in ignition, Ignition cylinder feels loose or sloppy, Security light stays on, no-start condition, Key rotates but nothing happens (no crank, no accessory power)

Fix: Tumbler springs wear out or ignition lock cylinder housing cracks. Related to recall 14V-053 on some vehicles. Requires steering column disassembly and cylinder replacement with relearn procedure for PassLock security system. 2-3 hours labor. Ensure replacement includes correct PassLock coding.

Estimated cost: $350-600

Typical onset: 100,000-160,000 mi

Symptoms: No-start or extended crank time, especially when hot, Stalling or hesitation under acceleration, Fuel gauge reading empty when tank is full or erratic readings, Whining noise from rear of vehicle

Fix: Fuel pump module in tank wears out; level sender floats also degrade. Requires tank drop and module replacement. 2.5-3 hours labor. Replace entire pump module assembly, not just pump, to avoid sender issues.

Estimated cost: $500-800