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What is the firing order for a 1990 Buick Lesabre?

The 1990 Buick LeSabre likely used either a 3.8L V6 or a 4.3L V6. The firing order is different for these two engines.

* 3.8L V6: 1-6-5-4-3-2

* 4.3L V6: The 4.3L V6 was less common in the LeSabre, but if it's equipped with one, the firing order is usually 1-6-5-4-3-2 (but it's crucial to verify this with a repair manual specific to that engine code).

To determine the correct firing order for YOUR 1990 Buick LeSabre, you MUST check the engine's displacement (3.8L or 4.3L) and ideally consult a repair manual or the engine's data plate. The firing order can vary slightly even within the same engine family depending on the specific engine code.

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