* Engine size and type: Different engines were offered, and each might have been paired with different axle ratios.
* Transmission type: Automatic or manual transmissions, and even different versions of automatics, will have different gear ratios within the transmission itself.
* Rear axle ratio: This is the crucial specification. The rear axle ratio determines how many times the driveshaft rotates for every rotation of the wheels. Common ratios for the 2005 Silverado ranged from 3.42 to 4.10, but others existed depending on the truck's configuration (e.g., towing package).
To find the gear ratio of *your* specific 2005 Chevy Silverado, you need to look at:
* The sticker on the driver's side doorjamb: This often lists some key specifications, including possibly the axle ratio.
* The owner's manual: This should list the specifications for your particular truck.
* The vehicle's build sheet: If you have the VIN, you may be able to find the build sheet online through GM's resources or third-party sites. This will definitively list all the specifications.
Without knowing the specific configuration of your Silverado, it's impossible to give you a definitive answer.
