The 2006 Impala SS with the LS4 5.3L V8 is a front-wheel-drive sleeper with serious torque, but that power becomes its Achilles heel—the transverse-mounted V8 and 4T65E-HD transmission weren't originally designed for this much abuse, and it shows in catastrophic failure patterns.
Symptoms: Sudden loss of power, heavy blue smoke, and oil consumption over 1 qt/500 mi, Rod knock or deep bottom-end knocking on cold start, Metal shavings in oil, check engine light with misfire codes, Catastrophic failure: connecting rod through block
Fix: The LS4 suffers from piston ring land failures and bearing wear, especially in engines that saw hard launches or poor oil change intervals. Repair requires full engine rebuild or short block replacement—typically 18-24 labor hours for R&R plus machine work. Many owners opt for used engine swaps due to cost.
Estimated cost: $4,500-8,000
4T65E-HD Transmission Failure
Common · high severity
Typical onset: 90,000-130,000 mi
Symptoms: Harsh 2-3 shift or slipping under throttle, Transmission shudder on acceleration, Delayed engagement into drive or reverse, Complete loss of forward gears, stuck in 2nd or 3rd
Fix: The 4T65E-HD was beefed up for the SS but still struggles with 303 lb-ft of torque. Input shaft splines strip, clutch packs burn, and the differential can grenade. Full rebuild takes 12-16 hours; many shops won't rebuild them anymore and go straight to reman unit.
Estimated cost: $3,200-4,800
Transmission Oil Cooler Line / Radiator Contamination
Common · high severity
Typical onset: 70,000-110,000 mi
Symptoms: Pink or milky transmission fluid (coolant contamination), Overheating transmission, burnt smell, Strawberry milkshake appearance in coolant reservoir, Transmission slipping after coolant intrusion
Fix: The internal trans cooler in the radiator fails, mixing coolant and ATF—kills the transmission in days if not caught. Requires new radiator, external trans cooler install, full fluid flush (multiple times), and often transmission rebuild if driven after contamination. Radiator replacement alone: 3-4 hours.
Estimated cost: $800-1,200 (preventive radiator/cooler), $4,000-6,500 (if trans damaged)
Head Gasket Failure (Both Banks)
Occasional · high severity
Typical onset: 100,000-150,000 mi
Symptoms: White smoke from exhaust, sweet smell, Coolant loss with no visible leaks, Overheating, especially under load, Bubbles in coolant reservoir when running
Fix: LS4 head gaskets can fail, especially if the engine overheated previously or had coolant neglect. Both heads typically need resurfacing. Labor-intensive due to FWD packaging—must pull intake, exhaust manifolds, accessories. 14-18 hours labor, plus machine work if heads are warped.
Estimated cost: $2,800-4,200
Transmission Mount Collapse
Common · medium severity
Typical onset: 60,000-100,000 mi
Symptoms: Severe clunk on hard acceleration or deceleration, Excessive engine/trans movement visible under hood, Vibration at idle in gear, Difficulty shifting into gear
Fix: The torque from the LS4 destroys the upper transmission mount quickly. Collapsed mount allows excessive powertrain movement, which accelerates CV axle and transmission damage. Replacement is 2-3 hours—must support trans and engine properly. Use OEM or polyurethane aftermarket.
Estimated cost: $250-450
Fuel System Contamination from Failing Pump/Filter
Occasional · medium severity
Typical onset: 80,000-120,000 mi
Symptoms: Hard starting, especially when hot, Loss of power under load, hesitation, Fuel pressure drop, check engine light for lean codes, Whining noise from rear of vehicle
Fix: Fuel pump failures send debris through the system; if the inline filter wasn't serviced (many techs overlook it), contamination reaches injectors. Pump replacement: 2-3 hours (drop tank). Filter change: 0.5 hours but requires lifting vehicle. Injector cleaning/replacement adds cost if contaminated.
Change transmission fluid every 30,000 mi with full-synthetic Dexron VI—the 4T65E-HD hates neglect and heat.
Install an external transmission cooler and bypass the radiator's internal cooler BEFORE failure—cheap insurance at $200-300.
Use full-synthetic 5W-30 oil and change every 5,000 mi max; the LS4 has active fuel management (cylinder deactivation) that's hard on oil.
Replace transmission mount at 60k-70k preemptively if you drive hard—collapsed mounts accelerate everything else's death.
Check coolant and transmission fluid color religiously; pink ATF means immediate shutdown to save the trans.
Buy one only if you're handy and can budget $5k for inevitable trans/engine work—or find a unicorn with full service records and already-replaced major components; otherwise, the repair costs will exceed the car's value quickly.
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.
Fitment notes: Side post terminals; 5.3L V8 SS model requires higher CCA than base models
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Every control module on the 2006-2009 Chevrolet Impala SS — where it lives, replacement time, and what it takes to program a replacement. Modules marked dealer / factory tool won't work after a part swap alone — budget for programming.
⚠️ Passlock II system. BCM replacement requires full theft relearn with 30-minute procedure.
Tire Pressure Monitor Control Module (TPMS)relearn only +0.2 hr▸ programming details
📍 Integrated within BCM
🔧 Tech 2 or TPMS relearn tool
⚠️ 2007+ models; sensor ID relearn required after tire rotation or sensor replacement
Aftermarket tool coverage varies by software version and vehicle build — treat "aftermarket tool" rows as "usually possible" and verify against your tool maker's coverage list before promising a customer. Spot a wrong location or hour? Tell us — corrections ship fast here.
This defect can affect the safe operation of the airbag system. Until this recall is performed, customers should remove all items from their key rings, leaving only the ignition key. The key fob (if applicable), should also be removed from the key ring.
General Motors LLC (GM) is recalling certain model year 2005-2009 Buick LaCrosse, 2006-2011 Buick Lucerne, 2000-2005 Cadillac DeVille, 2006-2011 Cadillac DTS, 2006-2014 Chevrolet Impala, and 2006-2007 Chevrolet Monte Carlo vehicles. In the affected vehicles, the weight on the key ring and road conditions or some other jarring event may cause the ignition switch to move out of the run position, turning off the engine.
Consequence: If the key is not in the run position, the air bags may not deploy if the vehicle is involved in a crash, increasing the risk of injury. Additionally, a key knocked out of the run position will cause loss of engine power, power steering, and power braking, increasing the risk of a vehicle crash.
Remedy: GM will notify owners, and dealers will install two key rings and an insert in the key slot or a cover over the key head on all ignition keys, free of charge. The recall began on September 23, 2014. Owners may contact General Motors customer service at 1-800-521-7300 (Buick), 1-800-458-8006 (Cadillac), and 1-800-222-1020 (Chevrolet). GM's number for this recall is 14299.
STEERING · 09E005000
2009-02-17
DORMAN IS RECALLING 979 STEERING KNUCKLES, DORMAN P/NOS. 697-902 AND 697-903, SOLD UNDER DORMAN'S "OE SOLUTIONS<SUP>TM</SUP>" BRAND NAME, AND NAPA P/NOS. 7-8502 AND 7-8503 WHICH WERE SOLD FOR REPLACEMENT USE ON THE VARIOUS VEHICLES LISTED ABOVE. A POTENTIAL MATERIAL OR DESIGN DEFECT COULD RESULT IN THE STEERING KNUCKLE BREAKING IN THE HUB AREA.
Consequence: A BROKEN STEERING KNUCKLE COULD RESULT IN LOSS OF STEERING CONTROL AND A POSSIBLE CRASH WITHOUT WARNING.
Remedy: DORMAN WILL NOTIFY OWNERS AND REPLACE THE DEFECTIVE STEERING KNUCKLES FREE OF CHARGE AND REIMBURSE THE REPAIR FACILITY OR OWNER FOR LABOR. THE RECALL BEGAN ON FEBRUARY 23, 2009. OWNERS MAY CONTACT DORMAN'S TOLL-FREE HOTLINE AT 1-800-523-2492 AND PRESS 5.
Wiper blades
Sedan body style, no rear wiper. 2006-2009 Impala SS shares wiper specifications with standard Impala of this generation
Size-standard part numbers — verify your connector type before buying. Rear blades are model-specific; check the package's vehicle list.
Fuel economy figures are EPA data via fueleconomy.gov (median across matching trims). Performance figures are compiled estimates for the 2006 Chevrolet Impala SS 5.3L V8 and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years.