* 3.0L V6: 1-6-5-4-3-2
* 3.8L V6: 1-6-5-4-3-2 (This is the most common firing order for the 3.8L V6 in many GM vehicles of that era)
You'll need to check your vehicle's engine displacement to know for sure which applies to your specific Transport. This information is usually found on a sticker under the hood or in your owner's manual.
