What is the firing order on coil pack for a 1992 Buick Riviera 3600?

The 1992 Buick Riviera 3800 (not 3600) uses a 3.8L V6 engine. These engines don't use individual coil packs per cylinder. Instead, they have a distributorless ignition system with a single coil pack that fires sequentially to each of the six spark plugs.

Therefore, there isn't a "coil pack firing order" in the traditional sense. The spark plug firing order is the relevant information, and that for the 3.8L V6 in the 1992 Buick Riviera is typically 1-6-5-4-3-2.

To determine the actual firing order *for your specific engine*, it's best to:

* Check your owner's manual: This is the most reliable source.

* Look at the engine block: Sometimes the firing order is cast into the engine block itself.

* Consult a repair manual (like a Haynes or Chilton manual): These provide detailed engine specifications.

Remember that while the typical firing order is 1-6-5-4-3-2, variations are possible depending on minor engine variations. It's crucial to verify the exact firing order for your specific vehicle.