Does my 1992 Chevy K1500 have a 2 or 4 bolt main?

A 1992 Chevy K1500 could have either a 2-bolt or 4-bolt main depending on the engine. You need to specify the engine to know for sure. The most common engines in that year were the small-block V8s (like the 5.0L/5.7L/or 7.4L) and a few others. The 4-bolt main is generally found on higher-performance versions of the small block engines or larger displacement engines.

To find out definitively:

1. Check your engine block: Look for the bolts holding the main caps in place. This is the most reliable method.

2. Check your vehicle's documentation: Your owner's manual or service records might specify the engine type.

3. Look up your VIN: Using your Vehicle Identification Number (VIN) on a vehicle history site might reveal engine specifications.

4. Check the engine casting number: This number, usually found on a flat surface of the engine block, can be looked up in an engine identification guide to determine the engine type and whether it's a 2 or 4-bolt main.

Without knowing the engine, it's impossible to give a certain answer.