I came across these in bulk.
Part number 1991072 - Most off these were tightened too hard and stripped the set screw causing them to fall off and get lost. These are longer than the wiper knobs.
There is no GM packaging, but these are NOS especially for the manual throttle setups. You can cut up an old wiper knob and remove the center. Randy500 showed me this.
I am trying to come up with some small boxes to ship.
$36 shipped conus.
Covid Sale: $29.99 Shipped Conus!