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The firing order for the 4.3L engine is 165432
1-6-5-4-3-2
the firing order for a 1992 gmc sierra c1500 v6 4.3 liter is 1-3-5 drive side front to rear 6-4-2 passenger side front to rear
1-8-4-3-6-5-7-2
1.8.4.3.6.5.7.2
Distributor rotates clockwise.The firing order is 1-6-5-4-3-2
Firing order is 1-5-3-6-2-4
1,5.3,6.2,4
4.6l isn't a v6, its a v8. ive never heard of any sierra coming in a v6 model to begin with. as for the firing order...18436572 is what mine is and i have a 1990 sierra 1500. Mike's answer... I have a 1994 Sierra 1500 that came with a 4.3l Vortec V6. It was a very common motor in the 1/2 ton trucks. My brother in law has a 1992 with the same motor. Mine has 325,000 miles on it. The firing order is stamped on the intake manifold. Ray's answer....If it is the 4.3 the firing order is 1-6-5-4-3-2 with clockwise distributor rotation.
4.3 firing order 165432
1-8-4-3-6-5-7-2 its a number i will never forget
Replace one at a time so not to mess up the firing order.