Check the listing for details. GM HVAC Blend Door Actuator Gear Rebuild kit (fits many GM vehicles 1990-2013). Condition: New. Listed at 9.99 USD. This item comes with a full LIFETIME WARRANTYMade from virgin polymer which is self lubricating - no need for extra messy greaseCNC machined from solid stock - no small air inclusions as in other 3d printed designs nor cast original gearCustom design which does not rely on "press" fitSimple replacement - slide old broken brittle gear off and slide new solid gear on100% Made in Michigan USA! - both material and finished product!The factory gearbox doesn't last as the factory gear is made from a brittle material which cracks rendering the gear useless. The cracked gear just spins on its shaft.This constant spinning creates the "clicking" noise from the factory gearbox as the open or closed status is "searched" for.Our design is CNC machined for exact fit without any chance of cracking.When the gear is replaced on the stock shaft there is no slipping and no more annoying clicking sound. Replacement gearboxes are cheap but you will just need to replace the gear again and again. This gear is a simple solution to a very common and yet very annoying problem for a PERMANENT solution! If your gear is a 51 tooth and approximately 1 3/8" diameter this should fit your gearbox!