CSL1/CS1, CSL2/CS2 and CSL3/CS3
CSL1: Level I Controlled Shipping includes a problem solving process as well as a redundant inspection process. The inspection process is enacted by the supplier’s employees at the supplier’s location in order to isolate GM from receipt of nonconforming parts/material.
CSL 2: Level II Controlled Shipping includes the same processes as Level I controlled shipping, with an added inspection process that is completed by an impartial third party. The third party is selected by GM and paid by the supplier. In special cases, the Level II inspection may be required to be performed outside the supplier’s facilities at a facility deemed appropriate by GM.
CSL3: This level is similar to CS2 and is supplemented by corrective actions.