What size rear end in 2009 Chevy truck?

The rear axle size in a 2009 Chevy truck depends heavily on the specific model and trim level. Chevrolet offered a wide variety of configurations for their trucks that year. You'll need to check your truck's specifications to determine the exact size. These specifications can usually be found:

* On the Vehicle's VIN plate: Located in the driver's side doorjamb. The VIN can be used to look up your truck's exact specifications online.

* In your owner's manual: This will list the specifications for your particular truck.

* On a sticker in the glove compartment: Some vehicles have a sticker with key specifications.

* On the differential itself: The ratio (e.g., 3.73, 4.10) and sometimes other identifying markings are often cast into the differential housing. You may need to look under the truck to see this.

Without knowing the specific model (e.g., Silverado 1500, 2500HD, 3500HD) and trim level, it's impossible to give a definitive answer.