The 2006 Chevrolet Impala came with multiple engine options, but the 5.3L LS4 V8 was available in the SS model. This naturally aspirated aluminum block engine produces 303 horsepower and 323 lb-ft of torque. It features Active Fuel Management technology that deactivates four cylinders under light load conditions to improve fuel economy. The LS4 is a front-wheel-drive variant of GM’s popular LS engine family, specifically designed for transverse mounting in FWD applications. It’s paired with a 4T65E-HD four-speed automatic transmission and delivers an EPA rating of approximately 18 mpg city and 28 mpg highway.

The 2006 Chevrolet Impala shares many parts with the 2006-2013 model years of the same generation. Body panels, interior components, and many mechanical parts interchange well within this range. The 5.3L LS4 engine was used from 2006-2009 in the Impala SS, so engine-specific parts are limited to those years. However, many suspension components, brake parts, and electrical components are compatible across the entire 2006-2013 generation. Some parts also interchange with the Chevrolet Monte Carlo from 2006-2007, as they shared the same W-body platform. Always verify part numbers and specifications, as mid-year changes and different trim levels can affect compatibility.

Parts availability changes daily. Call us at (603) 392-7313 or visit our online shop to check current inventory from this specific vehicle. If we have sold a part you need, our Parts Broker service can source it from our network of partner yards nationwide.

Yes! We ship parts from this vehicle and our entire inventory nationwide. Most orders ship within 1-2 business days via FedEx or freight carriers for larger components like engines and transmissions. Call (603) 392-7313 for a shipping quote on any part.

The 5.3L LS4 engine in the 2006 Impala is generally reliable but has some known weaknesses. The Active Fuel Management system is the primary concern, as lifter and camshaft failures are common after 100,000 miles. When properly maintained with regular oil changes using the correct viscosity, many of these engines exceed 200,000 miles. The aluminum block and heads provide good heat dissipation, but the intake manifold gaskets require attention. Avoid extended oil change intervals and consider AFM delete modifications for long-term reliability. Overall, it’s a capable engine that responds well to preventive maintenance but requires attention to known failure points.