The 2006 Cadillac CTS comes standard with a 3.6L High Feature V6 engine producing 255 horsepower and 252 lb-ft of torque. This DOHC 24-valve engine features variable valve timing and was one of GM’s most advanced powerplants at the time. The engine is paired with either a 5-speed manual transmission or 5-speed automatic (5L40-E). This naturally aspirated V6 provides smooth power delivery and decent fuel economy for its class, achieving approximately 18 city/26 highway MPG. The engine requires premium fuel for optimal performance and features an aluminum block and heads for weight savings.

The 2006 Cadillac CTS shares most parts with the 2003-2007 first-generation CTS models. Engine components from the 3.6L V6 are largely interchangeable across these years, though there were minor updates in 2005. Body panels, interior trim, suspension components, and most electrical parts interchange well within this generation. Some early 2003 parts may have slight differences. The transmission, brake components, steering parts, and most mechanical systems are compatible across the entire first-generation run. However, always verify part numbers as GM made running changes throughout production that could 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 3.6L V6 in the 2006 CTS has mixed reliability. While it produces good power and runs smoothly when maintained, it’s prone to timing chain stretch issues that can be expensive to repair. Regular oil changes with the correct viscosity are critical, as is using premium fuel. The engine generally runs well for the first 80,000 miles but requires more attention afterward. Water pump replacement is almost inevitable, and ignition coils need periodic replacement. With proper maintenance including timing chain inspection around 80,000 miles, the engine can provide reliable service, but neglect can lead to costly repairs.