GM part number 123308 not found.
At GM parts site ":Number not found" It's probably an aftermarket part number, but it's not a GM
That part Number does not show up in any GM cross f=reference of parts. Vehicle and make?
GM part number 987268 is a set of door edge guards to suit 1967-1968 Chevrolet Camaro models
10219021 label can be used on any GM vehicle
Brake pads for a GM vehicle. Not sure what years it will fit though.
gm 14 bolt rear end housing
It is the Air Conditioning bracket
Should be a steering box
3963512 is not a part number. That is the block casting number for Big-Block 427 or 454 engines
The GM part number 15961566 can be purchased at any GM dealership or on line at GMPartsDirect.com or OnlyFactoryParts.com.
A Mass Air Flow (MAF) sensor. Fits many GM vehicles for 2014.