1994 GMC Sierra K3500 pick up truck

[hammer906]

Need to adjust timing on newly rebuilt motor, and was told there's a wire called a 'breakoff' wire that goes from the distributor to a terminal block on the firewall or inner kick panel, and must be separated before timing light is used. Cannot find wire. Please help. Jeff

[SpitAndDirt]

You posted in the wrong forum. Should be somewhere near the distributor, open connector. I believe it needs to be shorted to ground, so that the computer will not make timing adjustments while you are setting base timing. I can't tell you for sure however.

[amac209]

on a 94 that wire is in the area down under the glovebox. it's a tan& blackwire. your timing should be set to 0 with this wire unhooked.