someotherguy
+1y
You can't use hardly ANY of it.
What Lowboy said is right as far as TBI vs. Vortec, but more to the point, '95 is a total oddball one-year-only for so many things and that includes the harness. It's got the electrical convenience center under the hood like a '96-up Vortec truck, but has the PCM behind the glovebox like a TBI, then there were a few other changes including even the connector style on the headlight/front light harness - if I recall '95-'96 are the same on that one, '97-up use a different connector. It's kinda ridiculous.
Your best bet for a harness that will work for your '98 is a '97 through '99 or possibly '00 carryover OBS model with the same engine and transmission. I'd offer up the harness out of my '98 crew 7.4/auto but it's still busy being my yard wrecker for the moment.
Richard