Description: 4.2L. All models. 2.8 & 2.9L. Canyon, Colorado. Hummer H3. 3.7L.

Description: 4.2L. All models. 1st design. Seals the openings on either end of the crankshaft for a tight seal Withstands heat and pressure to help prevent the engine from leaking oil 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

Description: 4.2L. All models. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors

Description: Genuine GM Timing Chain, part number 12571725. This GM OEM timing chain keeps the crankshaft and camshaft(s) synchronized so the valves open and close at the right time. 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 12571725 before ordering. Shipped from Gateway Buick GMC, an authorized GM dealer.

Description: Genuine GM Engine Timing Chain Guide, part number 12575159. This GM OEM engine timing chain guide keeps the crankshaft and camshaft(s) synchronized so the valves open and close at the right time. 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 12575159 before ordering. Shipped from Gateway Buick GMC, an authorized GM dealer.

Description: Genuine GM Timing Chain Tensioner, part number 12598504. This GM OEM timing chain tensioner keeps proper tension on the belt or chain so it runs quietly and does not slip or jump. 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 12598504 before ordering. Shipped from Gateway Buick GMC, an authorized GM dealer.

Description: Genuine GM Crankshaft Sprocket, part number 24100061. This GM OEM crankshaft sprocket is an internal engine component built to factory specifications for proper fit, balance and durability. 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 24100061 before ordering. Shipped from Gateway Buick GMC, an authorized GM dealer.

Description: 4.2L. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors