GMC 152-22 (for USA GMC) - but that is for all 3/4 ton GMC ton models.
As Denny and Mike know: neither Chevrolet Trucks or GMCs came with special markings on the delivered vehicle that would indicate cab with pickup bed, cab with stake bed, cab with chassis. Chevrolet also had chassis w/no wondshield, chassis w/windshield, chassis with platform bed (I am not sure if GMC had those options/models in 1948).
To definitively ID the model, you'd need a bill-of-sale that lists the model.
