Sun visor clips are one of those parts nobody thinks about until the visor starts flopping down into the driver’s line of sight on a long stretch of highway. The Erchon 2-pack of S16-1023-661 replacement clips is aimed at that exact annoyance in Kenworth T680 and Peterbilt 579 cabs, and it also lists compatibility with the F01377-2 part number. It is a small, inexpensive fix rather than an upgrade, and it should be judged on fit, durability, and whether the color matches what is already in the cab.
The clips are sold in pairs and finished in gray. In practice, these parts hold the sun visor arm against the interior trim so the visor stays stowed when it is not in use. When the original clip cracks or loses tension, the visor droops, rattles over bumps, or swings out on its own. Replacing the clip restores the retention function, which matters most on long-haul routes where the visor is adjusted repeatedly through the day and where a loose visor becomes a genuine distraction.
Functionally, the design is straightforward: a molded plastic body with a slot that grips the visor rod and a mounting point that attaches to the headliner or trim panel. There are no moving parts or adjusters, which is typical for this kind of retainer. The two-pack is useful because these clips tend to fail in pairs or because a driver may want a spare on hand for a truck that sees heavy use. Installation on the T680 and 579 is generally a matter of removing the old clip and pressing or fastening the new one in place, though the exact method depends on how the original is secured in a given cab.
The most important caveat is fitment. The listing names the T680 and 579 and the F01377-2 reference, but truck interiors vary by model year, trim level, and whether the cab has been modified. Buyers should verify the part number on their existing clip before ordering rather than relying on the model name alone. A clip that is close but not exact can leave the visor loose or fail to seat flush against the trim. This is not a universal part, and treating it as one is the most common way to end up disappointed.
Color is the second trade-off. The gray finish is intended to blend with common interior trim, but gray covers a wide range. In cabs with darker or warmer-toned trim, the replacement may read as slightly off, especially on a part mounted at eye level. It is a cosmetic issue rather than a functional one, but drivers who care about interior appearance should compare the shade against their existing hardware. The plastic itself is rigid, which helps retention but means the clip has limited give; repeated flexing or a hard knock can crack it the same way the original failed.
Compared with the alternatives, this sits in the middle of the market. OEM clips from a dealer are the safest bet for exact fit and color match, but they cost more and may require a trip or a wait for shipping. Generic no-name clips are cheaper but often have looser tolerances. The Erchon pair lands between those poles: it is inexpensive and comes with a spare, but it does not carry the assurance of an OEM part. For a driver who has confirmed the part number, that trade-off is reasonable. For someone guessing at fitment, it is not.
Realistic expectations matter here. These are small plastic retainers, not a permanent fix. In a working truck, a replacement clip should hold the visor securely for a good while, but heat cycling, vibration, and daily use will eventually take a toll, just as they did on the factory part. The two-pack partly accounts for that. Drivers should also expect a modest difference in feel compared with the original, since aftermarket molding rarely matches OEM exactly.
This product suits owners of T680 and 579 trucks who have a confirmed part number, a drooping visor, and a preference for a low-cost DIY fix with a spare included. It also works for fleet maintenance where several trucks need the same small part. It is not suitable for drivers who are unsure of their part number, who need an exact color match, or who want the durability and fit assurance of a dealer part. Anyone with a different truck model should look for a clip specific to their cab rather than forcing this one to work.
