Free, no account, nothing to install. Resources and tools built specifically for the FSC community. If you have an idea or would like to see an additional tool added, don’t hesitate to submit a request here.
Ready to use
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GM RPO Decoder
Type the option codes off the sticker in your glove box, or photograph it and let the page read them. Every meaning is checked against your model year, because GM reused these codes for forty years.
Reads a photo of your glovebox sticker and gets nearly every code.
24,366 codes
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MPG Calculator
Miles, gallons, engine. You get your number and where it sits against everyone else running the same engine, because 14 mpg means nothing until you know what the truck next to you is getting.
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GM RPO Code Database
Every option code we hold, searchable by code or by description and filterable to your model year. Each entry says where the meaning came from, because GM reused these codes for forty years.
Being built
Below is our current planned tool list. We’ll be announcing on the forum when things go live. Any feedback or bugs, please post on the forum.
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Tire, Gear & Speedometer Calculator
You went up two sizes. How far off is your speedometer now, what did it do to your effective gearing, and which ratio puts you back where you started.
Not built yet
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Quick Identifiers
Engine RPO, axle code, transfer case, AFM or DFM. The things you need to know standing at a parts counter with somebody waiting on you.
Not built yet
What are we missing?
If there is a calculation you do by hand every time, or a spec you go hunting for over and over, tell us. We would rather build what people use than what we assumed they would use.
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