How do you find gear ratio 2003 silverado?

To find the gear ratio of a 2003 Chevrolet Silverado, you can check the vehicle's RPO (Regular Production Option) codes, which are typically located on a sticker in the glove compartment or on the driver's side door jamb. Look for the code that corresponds to the axle ratio (e.g., GU6 for a 3.42 ratio). Alternatively, you can calculate the gear ratio by counting the number of teeth on the ring and pinion gears in the differential and dividing the ring gear teeth by the pinion gear teeth.