Description: Genuine GM Iridium Spark Plug, part number 12646780. This GM OEM iridium spark plug ignites the air-fuel mixture in the cylinder, with an iridium tip that resists wear for a strong, consistent spark and long service life. Made by General Motors to original equipment standards for correct fit, finish and durability—no guesswork with aftermarket parts. Verify fitment using your VIN or GM part number 12646780 before ordering. Shipped from Gateway Buick GMC, an authorized GM dealer.

Description: This part requires programming and/or special setup procedures GM Service Information describes the procedures and special tools needed to ensure proper operation in the vehicle Helps keep engine timing and fuel injection running in sync Helps provide proper alignment, positioning, and spacing for easy installation Synchronizes engine valves and pistons for excellent engine performance

Description: Genuine GM Knock Sensor, part number 12729597. This GM OEM knock sensor monitors operating conditions and sends signals to the vehicle's control modules. Made by General Motors to original equipment standards for correct fit, finish and durability—no guesswork with aftermarket parts. Verify fitment using your VIN or GM part number 12729597 before ordering. Shipped from Gateway Buick GMC, an authorized GM dealer.

Description: 3.6L. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors Original equipment parts are designed to work with your GM vehicle safety systems - aftermarket replacement parts may not meet the same OE safety regulations, depending on the part type