Description: Genuine GM Engine Timing Chain Guide, part number 14078822. 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 14078822 before ordering. Shipped from Gateway Buick GMC, an authorized GM dealer.