Which rear end does the 1999 Chevrolet silverado have in it?

The 1999 Chevrolet Silverado could have several different rear ends, depending on the trim level, options, and whether it's a 1/2 ton, 3/4 ton, or 1-ton truck. There wasn't one single rear axle used across the board. Common possibilities include:

* 8.5-inch 10-bolt: This was a common rear end for lighter-duty half-ton Silverados.

* 10.5-inch 10-bolt: A more heavy-duty option, sometimes found on half-ton models and more frequently on 3/4-ton models.

* 14-bolt: This was typically found on heavier-duty 3/4-ton and 1-ton Silverados. It's a very strong and durable axle.

To know for sure which rear end is in a *specific* 1999 Silverado, you'd need to look at:

* The vehicle's build sheet (if available): This will list the specific options and components.

* The axle itself: The axle housing will have identifying numbers stamped on it.

* The owner's manual: While less likely to specify the axle type directly, it might give clues based on the truck's specifications.

Without knowing the specific truck's configuration, it's impossible to say definitively.