Retainer – GM (21030249)

Factory part number 21030249: a retainer supplied by GM. It is catalogued under Nuts & Washers > Rings & Retainers.

• Genuine parts are made to the drawing the vehicle was built from, so dimensions and materials match the part being removed rather than being close to it.
• The number stamped on the old part is the only reliable identifier, since two parts can look identical and differ by a millimetre or by rotation direction.
• Fitment lists are a guide rather than a guarantee, because the same model year can carry different parts depending on the production break and the option code.

A lock nut and a plain nut are not substitutes on a steering or suspension joint, and a wave washer holds preload rather than merely spreading load. A part that fails early usually points at an installation fault or a worn component nearby rather than at the part itself.

The part number is the thing to verify. Where the old part carries no legible number, a VIN and a photograph are enough for us to identify it. In stock and sent from the US in one to two business days, free delivery over $59.