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What is the firing order for a 2000 Buick LeSabre?

The 2000 Buick LeSabre, depending on the engine, has one of two firing orders:

* 3.8L V6 (Series II): 1-6-5-4-3-2

* 3.8L V6 (Series I, less common in 2000): 1-2-3-4-5-6 (though less likely for a 2000 model year)

You'll need to verify which engine is in your specific vehicle to know for certain. The easiest way to do this is to check your vehicle's documentation (owner's manual) or look at the engine itself for an identification plate.