6 5
4 3
2 1 u faceing motor
Firing order 1,6,5,4,3,2. To find number 1 plug at distributor set timing mark to top dead center on compression stroke and with distributor cap removed rotor will point to number 1 cylinder in cap. Also number 1 cylinder is on drivers side all the way to the front the next cylinder behind that is number 3 and then 5. So passenger side all the way from front will be 2,4,6 at the firewall. Number 1 plug wire will also be the second longest wire in most cases or as long as number 2 cylinder. Hope this helps.
Source: spark plug wiring diagram for 98 tahoe
Source: Need diagram for spark plug wiring for 1997 Chevy
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