For 1990-2009 cars

Application | GM SPO Group Number
--- | ---
Cigar Lighter | 9.709
Console | 10.240
Cross Vehicle Beam | 10.230
Cupholder - Front Floor Console | 10.240
Defroster Grille | 9.780
Fuel/Rear Compartment Release Switch | 12.243
Ignition Switch | 2.188
IP Carrier | 10.230
IP Cluster | 10.230
IP Cluster Indicator Lamp | 10.230
IP Compartment Lamp Switch | 2.490
IP Dimmer Switch | 2.490
IP Endcap | 10.235
Insulator - IP (Left) | 10.230
Insulator - IP (Right) | 10.230
Lamp Monitor Module | --
Storage Compartment - IP | 10.260
Trim Panel (IP Cluster) | 10.230
Trim Plate - Console | 10.240
Trim Plate, IP Accessory | 10.252