GMC calls it an "Accelerator control lever stud", part number is 838420. It was used on Chevy cars and trucks from the 30s into at least the 50s. GMC used it from 39 to at least 1960. Part number is 838420.

Chevs of the 40s has them listed under the same part number.

Your looks a lot better than mine did.
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Last edited by Bill Hanlon; 09/08/2023 8:16 PM.
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.