Does anyone know what the OEM number is for the GM OEM wheel locks that have the external threads that will fit the crosslace alloy factory wheels on a '93 Bonneville? My understanding is that the McGard external threaded locks will not accept the plastic lug nut caps. Thanks..

GM has discontinued them for our generation. There were 3 'combinations' availabie, coded by color (only in name, they were NOT pretty colors!). Red, Violet, and Yellow code in order were GM part numbers 9592286, 9592287, 9592285. A dealer may possibly still have some in stock.