Firing order is 1-5-3-6-2-4
1.8.4.3.6.5.7.2
1,5.3,6.2,4
The firing order for the 4.3L engine is 165432
18436572
The firing order for the 4.3L engine is 1 6 5 4 3 2
I believe it is 18436572 1.8.4.3.6.5.7.2
Firing order 1-6-5-4-3-2
We need to know size engine you have.
firing order for the 454 is the same as the 350 ( 1-8-4-3-6-5-7-2 )
1-6-5-4-3-2
Same as all GM 4.3 vortec V6's: 1,6,5,4,3,2
The correct firing order is 1-3-4-2.