V6 : 1-6-5-4-3-2 V8 : 1-8-4-3-6-5-7-2 Driver's side is front to rear 1,3,5,(7). Passenger side 2,4,6,(8).
no
If it is a 5.7L or 5.0L the firing order is 18436572.
Click the link for a diagram
Click the link for a diagram
standard was 22 but Chevy had an optional 33 gallon tank
1-6-5-4-3-2
If it's a 350ci the firing order is 1-8-4-3-6-5-7-2
Order one from a GM dealer
1-8-4-3-6-5-7-2
hornrelay location for g20
1-8-4-3-6-5-7-2
set the gap to .035-.045