2020-2021 Chevrolet Corvette C8 Fob/Remote: Programming, Part Numbers, and Replacement Guide
This guide covers the critical details you need to know about replacing the key fob for your 2020-2021 C8 Corvette, including the crucial differences between coupe and convertible models and mandatory programming requirements.
- Programming is mandatory and requires a dealer or professional locksmith with specialized tools; DIY is not an option if you only have one key.
- You must match the FCC ID YGOG20TB1 and choose the correct fob: 6-button for Coupe (13538850) or 7-button for Convertible (13538851/13538852).
- Buying a used fob is extremely risky as they are typically locked to the original car and cannot be reprogrammed. Only buy "unlocked" or "virgin" fobs from reputable sources.
- The emergency key blade (HU100) is sold and cut separately from the fob itself.
Key Fob Variants: Coupe vs. Convertible
A critical point of confusion for C8 Corvette owners is the difference between key fobs for coupe and convertible models. They are not interchangeable, and using the wrong one will result in non-functioning features.
- 6-Button Fob (Coupe): Part number 13538850 is the primary fob for coupe models. It includes buttons for Lock, Unlock, Remote Start, Panic, Trunk Release, and Frunk Release.
- 7-Button Fob (Convertible): Part number 13538851 or 13538852 is for convertible models. It has an additional seventh button to remotely lower the convertible top.
Warning: Always verify the button count and part number before purchase. A 6-button fob cannot operate the convertible top, and while a 7-button fob might perform basic functions on a coupe, it is not the correct part.
Symptoms of a Failing Fob/Remote
Failure can be gradual or sudden. While a dead battery (CR2450) is the most common culprit, other issues can arise.
- "No Remote Detected" Message: The car may not recognize the fob is inside, preventing you from starting the vehicle. Placing the fob in the backup transmitter pocket near the cupholder is a temporary workaround.
- Rapid Battery Drain: Some fobs may have internal faults causing a parasitic draw that kills new batteries quickly.
- Unresponsive Buttons: One or more buttons may stop working, preventing you from locking/unlocking doors or using remote features.
- Complete Communication Loss: In some cases, the fob may lose all communication with the vehicle, unable to lock, unlock, or start the car remotely.
- Worn Button Icons: Some owners have reported that the icons on the buttons wear off prematurely, which is a cosmetic issue but can be annoying.
Known Issues, TSBs, and Recalls
As of this writing, there are no specific recalls for the 2020-2021 Corvette key fob itself. However, GM has issued technical service bulletins (TSBs) related to vehicle programming and key policies.
- TSB #20-NA-018: This bulletin informs technicians that the MDI 2 interface is required when programming vehicles with the Vehicle Intelligence Platform (VIP), which includes the C8 Corvette.
- Warranty Policy: A general warranty bulletin covers key fob replacement under the New Vehicle Limited Warranty. Owners experiencing issues like rapid battery drain within the warranty period (3 years/36,000 miles) may be eligible for a free replacement from a dealer.
Programming and Immobilizer Information
Warning: A new or replacement key fob for a 2020-2021 Corvette MUST be professionally programmed to the vehicle. It will not work out of the box.
The C8 Corvette uses an advanced, encrypted security system. This makes programming more complex than on older vehicles.
- Dealer or Professional Locksmith Required: Programming requires specialized tools like GM's Techline Connect software (SPS2) or high-end aftermarket tools like the AutoProPad with a CAN FD adapter. Generic DIY programming methods that work on older cars will not work for the C8.
- Adding a Key (if you have two): For 2020-2022 models, if you already have two working, programmed keys, you can program a third key yourself using a procedure in the Driver Information Center (DIC).
- Replacing a Key (if you have one or none): If you have only one key or have lost all keys, a trip to the dealer or a qualified automotive locksmith is mandatory. They will need to perform a full key delete and reprogram all fobs to the vehicle.
Pro Tip: When getting a new key programmed, it's a good security practice to have the technician perform the "full key delete" procedure. This erases all previously known keys from the car's memory, ensuring any lost or stolen fobs can no longer be used to access your vehicle.
Buying a Used Fob/Remote
Buying a used key fob for a C8 Corvette is extremely risky and generally not recommended.
- One-Time Programming: Most sources indicate that OEM GM smart keys are designed to be programmed to a single vehicle and cannot be reprogrammed to another car once they have been 'locked' to a VIN.
- "Unlocked" or "Virgin" Fobs: The only used fobs that *might* be reusable are those that have been professionally "unlocked" or "refurbished" by a specialist, returning them to a virgin state. Always confirm with the seller that the fob is guaranteed to be in a programmable, unlocked state. Be very skeptical of fobs from private sellers on auction sites.
- Verify the FCC ID: The single most important piece of information is the FCC ID. It must be YGOG20TB1. Fobs with the same appearance but a different FCC ID will not work.
- Why Used OEM is Risky: Unlike a mechanical part, the value of a fob is in its electronics and its ability to be programmed. If you buy a used, locked fob, it is essentially a paperweight. Given the high cost of programming, it is often safer and more cost-effective to purchase a new OEM or guaranteed-refurbished fob.
Cost Breakdown
| Item | Estimated Cost | Notes |
|---|---|---|
| New OEM Fob (Part Only) | $105 - $225 | Price from online GM parts dealers or local dealership parts counter. |
| New Aftermarket Fob | $30 - $160 | Quality and reliability can vary significantly. Ensure FCC ID matches. |
| Used OEM Fob (Locked) | $25 - $100 | Not Recommended. Very high risk of being unprogrammable. |
| Programming Labor | $120 - $300+ | Cost from a dealer or locksmith. Can vary widely by location and whether it's adding a key or replacing all keys. |
| Emergency Key Blade (Cut) | $20 - $50 | The physical key insert (HU100) must be purchased and cut separately. |
Frequently Asked Questions (FAQ)
Can I program a 2021 Corvette key fob myself?
Only if you already have two working keys and are adding a third. For 2020-2022 models, the car's DIC has a procedure for this. If you only have one key or are replacing a lost key, you must go to a dealer or a qualified locksmith with specialized equipment.
What is the difference between the 6-button and 7-button Corvette fob?
The 6-button fob (part #13538850) is for coupe models. The 7-button fob (part #13538851 or #13538852) is for convertible models and includes an extra button to operate the power top. They are not interchangeable.
Why is my fob eating batteries?
This can be a sign of an internal short or a stuck button on the fob, creating a constant drain. If new, high-quality CR2450 batteries don't solve the problem, the fob itself likely needs to be replaced. A Corvette technician noted that batteries with voltage below 3.0V may not be sufficient to operate the fob correctly, even if they work in other devices.
Can I buy a used key fob on eBay for my C8 Corvette?
This is highly discouraged. Most used GM smart keys are locked to the original vehicle and cannot be reprogrammed. You should only purchase a used fob if it is explicitly guaranteed by a reputable vendor to be in an "unlocked" or "virgin" state, ready for programming.
Technical Specifications
OEM Part Numbers: 13538850 13538851 13538852 13538853 13545155 13545167 13547760 13547761 13554500 13561652
FCC ID: YGOG20TB1, IC: 4008C-G20TB1, Frequency: 433MHz, Battery: CR2450, Emergency Key Blade: HU100, Chip: HITAG PRO ID49.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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