her is a link to a diagram, http://www.hotrodders.com/forum/attachment.php?attachmentid=17192, that should be all you need to know about that.
all chevy V8 engine share the same firing order of 18436572 in a clockwise rotation of the distributor when looking at it from the top.
http://autorepair.about.com/library/firing_orders/bl-chevrolet-firing-94.htm
Here is a link to Auto zone. Hope this helps you.
The firing order goes as follows 1 6 5 4 3 2
165432 is firing order I believe the #1 is the lower right if you looking from front of truck
The wiring diagram from the distributor cap to the spark plugs for firing order for a 93 Chevy Caprice 5.7 liter engine is found at Wiring4cars. You can search the site by vehicle year, make, and model.
Firing order is 1-2-3-4-5-6 Distributor rotates clockwise. Here is a diagram. http://autorepair.about.com/library/firing_orders/bl-fo-8356.htm
Firing Order: 165432 Distributor rotation: Clockwise 1993 Chevy 4.3L V6 Firing order
wiring diagram for firing order for 1992 Chevy silverado
A diagram for a 2001 Chevy impala 3.4L engine & coil pack firing order
18436572
18436572