To find the correct distributor cap wiring order, you MUST know your engine's displacement (e.g., 4.3L V6, 5.0L V8, 5.7L V8, etc.). Once you know the engine size, you can:
1. Consult your owner's manual: This is the most reliable source. The firing order and distributor cap wiring diagram should be in it.
2. Look under the hood: The engine's displacement is usually stamped on a metal tag somewhere on the engine block.
3. Use an online resource: Search online for "[Your Engine Displacement] Chevy 1500 firing order" or "[Your Engine Displacement] Chevy 1500 distributor cap wiring diagram." Be cautious and verify information from multiple reliable sources.
Without knowing the engine size, any firing order I provide would be potentially incorrect and could damage your engine.