1-8-4-3-6-5-7-2
Answer... 1,3,5,2,4,6
18436572
Chevy Firing Ordercheck related links below
165432 is the firing order.
Knowing the firing order of a car's engine can help troubleshoot problems later on. The firing order for a 1993 GMC Sonoma 2.5L engine is 1-6-5-4-3-2.
You can find the firing order right on of the intake maifold on most all GM cars and trucks.
Size engine would help.
The firing order for 1993 GMC Safari 4.3 L engine is 1, 6, 5, 4, 3, 2. The number one cylinder is on the right side at the front as you face the engine.
gmc jimmy1989 firing order spark plugs
1-8-4-3-6-5-7-2
1-8-4-3-6-5-7-2
The firing order is 18436572.