What is a window sticker?

A window sticker — officially the "Monroney label" — is the printed sheet the factory attaches to the window of every new vehicle. It has been federally required on new cars in the United States since the Monroney Act of 1958, and decades later it remains the single most authoritative summary of how a particular vehicle left the assembly line.

It lays out the standard equipment, the optional equipment and packages the original buyer selected, the EPA fuel-economy ratings, the warranty terms, the percentage of U.S./Canadian parts content, and the full price breakdown — base MSRP, each individual option, the destination charge, and the grand total. That original data is exactly what lets you confirm, years later, how a used vehicle was really configured.

Window sticker vs. build sheet

The two documents describe the same factory configuration in different ways. A window sticker is written for the buyer: plain equipment descriptions, fuel-economy ratings, warranty details, and a price breakdown right down to the destination charge.

A build sheet is the factory's own assembly record — the complete list of option codes a vehicle was built with, without pricing. WindowStickerVin.com returns the window sticker whenever one is on file, and automatically falls back to the build sheet when it isn't, so you always come away with the underlying factory data either way. For a deeper comparison, see our guide on window sticker vs. build sheet.

Why check your window sticker or build sheet?

Whether you're buying a used car, selling one, arranging insurance, or just settling a curiosity, the factory record is the most reliable way to confirm exactly how a vehicle was equipped the day it was built — far more dependable than a listing description or a faded memory.

It lets you verify the trim level, the engine and drivetrain, the option packages, and individual features, and it makes it easy to tell factory-installed equipment apart from anything a dealer or previous owner added afterward. For buyers especially, it's a quick way to make sure a seller's claims actually match how the vehicle left the line.

Any long-term experience with the 344 option?

Interior & Comfort · 2024 Cadillac CT5 · 567 views · 6 replies Solved

344 — Suede interior trim: Jet Black/Kalahari (L4). This code identifies the factory upholstery material, color combination, or interior trim specification. Browse RPO codes →

Mike T. Mar 1, 2026 · New York

My 2024 Cadillac CT5 has 344: “Suede interior trim: Jet Black/Kalahari (L4). This code identifies the factory upholstery material, color combination, or interior trim specification” I am curious how this option has held up for other owners and whether it has caused any reliability, service, or parts-availability issues.

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6 replies

Aaron W. Mar 3, 2026

I would start by checking the original build sheet and then compare the physical equipment on the vehicle. A sales or option code confirms the factory record, but it does not prove that every original component is still installed.

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Mark A. Mar 6, 2026

I would avoid buying retrofit parts until the connectors and module support are confirmed. Returning electronic or VIN-programmed components can be difficult.

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Ben W. Mar 7, 2026 Accepted answer

The safest interpretation is the one tied to the exact VIN, model year, platform, and market. In general, 344 matches “Suede interior trim: Jet Black/Kalahari (L4). This code identifies the factory upholstery material, color combination, or interior trim specification” but the included hardware can vary between applications.

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Hannah E. Mar 12, 2026

A clear photo of the build label, VIN report, and the relevant component would help. Do not post the full VIN publicly; the last eight characters are normally enough for a parts-counter discussion.

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Nina W. Mar 14, 2026

Check the production month as well as the model year. Mid-year changes are one reason two vehicles with the same badge can have different hardware or descriptions.

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Mike T. Mar 17, 2026

Thanks. I checked the physical equipment and it appears to match the build record. The model-year warning was the part I was missing.

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#344