I have a 1991 V1500 Chevy Suburban 5.7l 4x4 A/T. Where is the timing connector?

its a brown wire with a black tracer. It is either under the passenger side of the dash, or more likely part of the big wiring harness that runs near the relay panel (one with the fuel pump relay) on the passenger side of the firewall under the hood. You may have to pull it out of the plastic bundle. Its the only brown/black wire with a connection in it