Probably on the bottom of the timing cover on the front of the engine.
1-6-5-4-3-2
1.8.4.3.6.5.7.2
Firing order is 1-5-3-6-2-4
The firing order for the 4.3L engine is 165432
1,5.3,6.2,4
Cylinder order is drivers side...1,3,5 and 2,4,6, on the passenger side. Double check the wiring order to make sure that it is correct.
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
4-cylinder 1342,v-6 165432
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 )