February 14, 2010
You didn't post your engine size so please pick the applicable diagram:
1996-98 4.3L Engines Firing Order: 1-6-5-4-3-2Distributor Rotation: Clockwise
1996-98 5.0L, 5.7L and 7.4L Engines Firing Order: 1-8-4-3-6-5-7-2Distributor Rotation: Clockwise
4.3L Engines Firing order: 1-6-5-4-3-2 Distributor rotation: Clockwise
4.8L, 5.3L and 6.0L Engines Firing order: 1-8-7-2-6-5-4-3 Distributorless ignition system (one coil on each cylinder)
5.0L, 5.7L and 7.4L Engines Firing order: 1-8-4-3-6-5-7-2 Distributor rotation: Clockwise
Source: spark plug wiring diagram for 98 tahoe
Source: Need diagram for spark plug wiring for 1997 Chevy
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This was all I could come with, hope it helps.