A bit off-topic, but did the Tahoe sway bar bolt up with any issues? I picked up a 'hoe for parts but I haven't gotten around to checking if that's something that will transfer over to my c1500
Do this on level ground.
You need the brackets on the frame from the 'hoe, along with the bolts & the specific nuts that fit inside of the frame. Those have a tab on them which hits up on the inner frame rails to prevent them from spinning when tightening them down. Can't get a wrench in there to hold 'em.
You'll also need some 3" H/D extended length muffler clamps. Regular ones are shorter & the steel bar is a lighter gauge.
Plus, either the original small brackets/shells & bushings that bolt up to the 'hoe's rear diff, or you can get new grease-able ones with urethane bushings from any parts store for cheap. (-$20.00?)
The muffler clamps go in between the 2 plates of the shock mounts on the diff. One will face forward, the other back.
Slide that pressed & bent muffler clamp piece with the holes over the ends of the bent part.
IIRC the urethane bushings are split so they can be wrestled onto the bar. If not, gotta slide 'em on over the ends of the bar. Assemble the uprights & frame brackets onto the bar.
Bolt the assembly onto the muffler clamps. Fairly snug, but still loose enough so that they can be shifted around on the diff. The bolts have to be holding both the clamp & the bushing shells all with the one nut. Don't forget a washer.
Now you need a 3rd. hand. Someone to help get that bar horizontal to the ground & square to the frame. Tighten those clamps a bit.
With the weight of the vehicle on the tires, get a hold of that upright & bracket assembly. While holding those uprights as perpendicular as possible (Straight up!) from the ground, mark the holes to be drilled for the frame brackets.
Probably easier to just trace around the outside of the bracket. Mark the holes later. Seems to me that where the upright is bolted to the bracket is kinda tight in there to properly mark the holes. It's been a while since I've done one of these.
Drop it down & drill.
Now you have to take the frame brackets off of the uprights & bolt 'em to the frame using the donor's bolts & those specific nuts. Can't do that with the uprights attached to the brackets. No way to get any tool in there.
Once it's all mounted up, check to see weather the clamps have shifted & that the bar is still horizontal & square & that the uprights are still perpendicular. If it's all good, give everything a final snugging up.
I had a bit of a prob getting those uprights exactly right. Rather than re-drill those holes in the frame, a bit of a PitA, I slotted the holes in the frame brackets so I could adjust them to be just right.
Altogether, it took me the better part of 2 hours to do the first install of one of these.
The drilling of the holes in the frame took a while. On my back in the driveway. Hot shards of drilled frame metal falling! Yeow! Lol!