there are no threads on the column shift lever, the knob is a press fit .... the Chevy knob is available repro, although it may be slightly different than the GMC
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics
