1994 chevy silverado v8 spark plug diagram - 1991 Chevrolet C1500

For spark plug firing order diagram.
Click the link:
http://carrepairworld.blogspot.com/2016/06/96-v8-chevy-cheyenne-firing-order.html
Thanks.

Chevrolet / GMC / GEO Transmission Look Up Table

www.autorepairmanuals.biz/page/372807

Blazer, 1993-, 4L60-E. Blazer, 1994 - Up, 6.5L V8 Turbo Diesel, 4L80-E. BLAZER/TRAIL BLAZER/JIMMY, 1995-2003, 4 SP RWD/4X4, L4 2.2L L6 4.2L V6 4.3L ...

Transmission Applications - GM Automatic Transmissions

www.gmautomatictransmissions.com/transmission_applications.php

Avalanche, 2001-06, V8 5.3L 5.7L 6.0L, 4 Spd RWD/4X4, 4L60E. Avalanche, 2004-06... Camaro, 1994-05, V6 3.4L 3.8L, 4 Spd RWD, 4L60E. Camaro .... Monte Carlo, 1997-05, V6 3.8L (W/S.C.), 4 Spd FWD, 4T65E. Monte Carlo ... Silverado, Sierra,1500-3500, 1995-06, V8 4.8L 5.0L 5.3L, 4 Spd RWD/4X4, 4L60E. Silverado ...

4L60E Transmission Rebuilt ' eBay

You may have confused more than one run thru the firing order double check your connections maybe it's not locked onto the plug

Wilson;
I am guessing a 350 V8?
if si it is
1-8-4-3-6-5-7-2 Driver side front to rear 1-3-5-7 other side is front to rear 2-4-6-8

Check the voltage coming from the battery and check it again at the coil.I suspect you are not getting the proper voltage going through. Clean all the terminal ends to bare shiny metal and make sure all the connections are tight. If I remember correct your truck still has the HEI setup with the coil in the top of the distributor cap. If all the voltages are good, 12+ volts you should replace the coil. Hope this helps.

with a 5/8 inch spark plug socket and a rachet. simply pull the wire off of the plug, change the plug , then push the wire back onto the plug.

Distributor turns clockwise. Number 1 at 5 oclock position. Firing order is 1-6-5-4-3-2

To do a complete tune up:
Change spark plugs and wires
If equipped with a distributor
Distributor cap and rotor
Fuel filter
Air filter
Change oil and filter
Check all other fluids.

The Best diagram you can get is at alldatadiy.com it has the sections and locations and color of wires with pictures.

This image applies to engines with A.I.R. system

This image is for vehicles without A.I.R.

Hope this helps.