1996 CHEVROLET CAPRICE

Typical onset: 60,000-100,000 mi

Symptoms: no-start or random stalling, misfires during rain or humid weather, check engine light with multiple misfire codes, hard starting when engine is heat-soaked

Fix: The Optispark sits low on the front of the engine behind the water pump and harmonic balancer. Moisture intrusion kills the optical sensor and rotor. Requires removing water pump and balancer to access. Budget 4-5 hours labor for the job. Always replace the water pump at the same time since you're already there.

Estimated cost: $800-1,400

Typical onset: 80,000-150,000 mi

Symptoms: transmission fluid leaking at radiator connections, pink milkshake in coolant overflow (coolant mixing with ATF), transmission slipping or delayed engagement after coolant contamination, rusty steel lines at frame rail mounting points

Fix: The 4L60E uses radiator-integrated cooler that can rupture internally, mixing coolant into transmission fluid and destroying the trans within miles. External lines rot through at brackets. If coolant contamination occurs, expect full transmission rebuild (8-10 hours) plus radiator and lines. Prevention is replacing lines and adding external cooler. Lines alone are 2 hours labor.

Estimated cost: $300-600 (lines only), $2,500-4,000 (if transmission damaged)

Typical onset: 90,000-140,000 mi

Symptoms: clunking over bumps, steering wander or pulling, visible play when prying on tire, uneven tire wear on inside edge, NHTSA recall issued but many not repaired

Fix: The B-body lower ball joints can separate catastrophically, causing wheel to fold under. This was subject to recall but many owners never got it done. Joints are pressed into control arms. Proper fix is replacing entire control arm assemblies. 3-4 hours labor for both sides, always do pairs.

Estimated cost: $600-1,000

Typical onset: 70,000-120,000 mi

Symptoms: clunking from rear over bumps, rear axle steering or crabbing under acceleration, excessive rear tire wear, visible cracked or missing rubber bushings at trailing arm mounts

Fix: The four trailing arm bushings (two per side) deteriorate and cause the rear axle to shift around. This platform is notorious for eating these bushings. Requires pressing out old bushings and pressing in new ones, or replacing entire arms. 4-5 hours labor if using press-in bushings, less if going with complete arm assemblies.

Estimated cost: $500-900

Typical onset: 100,000-160,000 mi

Symptoms: fuel gauge reading erratically or stuck, no-start or stalling when tank below quarter full, whining noise from fuel tank, engine stumbling under acceleration

Fix: The in-tank pump and sending unit assembly fails. Requires dropping the 22-gallon fuel tank, which on these cars means fighting rusted straps and lines. Budget 2-3 hours labor if nothing breaks, add time for seized hardware on rust-belt cars. Replace both pump and sending unit as an assembly.

Estimated cost: $500-800

Typical onset: 70,000-110,000 mi

Symptoms: coolant weeping from vent hole on water pump, overheating in traffic or hot weather, low coolant warning despite full reservoir, steam from under hood after shutdown

Fix: The LT1 uses reverse-flow cooling and the water pump is buried under accessories and Optispark. When it starts weeping, it drips directly onto the Optispark distributor. This is a 4-5 hour job requiring removal of serpentine belt, harmonic balancer, and Optispark. Smart money does water pump and Optispark together preventively.

Estimated cost: $600-1,000

Symptoms: speedometer or other gauges dead or erratic, digital odometer display fading or blank, gauges sweeping randomly at startup, check gauges light with no other symptoms

Fix: The stepper motors for the analog gauges and the digital display components fail. Cluster must be removed and sent for repair or replaced. Removal is straightforward on the Caprice, about 1 hour labor, but repair services run $150-300. Used clusters are plentiful but mileage will be incorrect unless reprogrammed.

Estimated cost: $250-500