For a 1991 Chevy S10 2.5L engine the firing order is: 1-3-4-2 . The distributor rotates clockwise.
For a 1991 Chevrolet Blazer with 5.0L, 5.7L and 7.4L engines the firing order is 1-8-4-3-6-5-7-2 The distributor rotation is clockwise. Here's a web page with a wiring diagram: http://www.chuckschevytruckpages.com/underhoodwiring.html
Where is the horn located on a 1993 chevy blazer
1, 6, 5, 4, 3, 2.
165432 #1 cylinder is left front
The firing order should be 1-8-4-3-6-5-7-2.
When troubleshooting problems within an engine, it can help to know the firing order. The firing order of a 1991 Chevy Lumina 3.1L is 1-2-3-4-5-6.
Chevy 5.7 L firing order is 1-8-4-3-6-5-7-2 clockwise.
it will be stamped on your intake. all 8 numbers in a random order.