[Confirmed] Need my 2020 GMC Yukon XL's key code to program a replacement key - where to look?

644 views - Last reply: August 07, 2024
This topic is closed for new replies.
Matrixfan
Member since July 2022 • 23 posts

Where's the key code stored on a 2020 GMC Yukon XL for programming keys?

Posted on August 07, 2024
Adminbot
Staff Member • 1737 posts

Hello! We've developed a VIN-based tool to help you get your key code for the 2020 GMC Yukon XL. Check it out here: VIN Key Code Generator.

Posted on August 08, 2024

Replies (6)

Captaincrunch
Member • 100 posts

I’m not alone! My 2020 GMC Yukon XL is doing the same thing.

August 08, 2024 Reply
Yellowsub
Member • 100 posts

Following closely—this could be the fix I need for my 2020 GMC Yukon XL.

August 09, 2024 Reply
Hotwheels
Member • 8 posts

My 2020 GMC Yukon XL just sits silent—hoping this changes that.

August 10, 2024 Reply
Zombiehunt
Member • 56 posts

Trying this on my 2020 GMC Yukon XL later. Will report back.

August 11, 2024 Reply
Dragonfly
Member • 7 posts

Trying to avoid reprogramming costs for my 2020 GMC Yukon XL. This is a lifesaver.

August 12, 2024 Reply
Whitenoise
Member • 95 posts

Desperate to get my 2020 GMC Yukon XL running again. Trying this tonight.

August 13, 2024 Reply

Check the news !

Hot Rod & Custom Car Expo
🏎️ Local Meetup: Hot Rod & Custom Car Expo
No trophies, just cool cars and cool people

🗺️ Where: Brewery District
⏰ When: May 17 @ 12AM-4PM

Event features:
Photoshoot Area | Ride-Alongs

🔩 Forum Members: Post your ride in our event discussion thread! 👍

🔧 Performance Modding 101

👨‍🔧 Instructors:
• 4x4 Builder Mark Jensen
• Suspension Guru David Klein

🛠️ Hands-On Activities:
• Ceramic coating application
• 4-hour intensive training
• Personal coaching

📝 Skills Covered:
Paint decontamination | Polishing | Protective coatings

🚗 May 9, 2026 at 9:00 AM (4-hour)

🔥 Lunch and refreshments included!

Workshop: Performance Modding 101
Forced Induction Tuning Lab

🏁 Forced Induction Tuning Lab

🔧 Instructor: Pro Drag Racer Jake 'The Snake' Reynolds

💻 Workshop Includes:
• Real-world case studies
• 4-hour intensive hands-on training
• Fuel system upgrades | Injector sizing | Pump flow

📈 Bonus: 20% discount on performance parts

⏱️ Next Session: May 8, 2026 at 10:00 AM

Customize Your Tuning Focus:

🚀 Performance Mod Cost Estimator

Did you know? Proper tuning can add 20-30% more power from the same hardware

Vehicle Information

Modification Information

Additional Options

🔑 Car Key & Fob FAQ

Common questions about key programming, fob issues, and replacement options

Security Systems
An anti-theft system that prevents the engine from starting unless it detects the correct transponder chip in the key. The chip sends a unique code to the car's computer when you turn the ignition. No match = no start, even with a physically matching key.
Key Programming
Most transponder keys and smart keys can be reprogrammed if they haven't been damaged. Basic mechanical-only keys (no chip) can't be reprogrammed - they must be physically cut to match your locks.
Key Tip: Keep spare keys in a faraday bag to prevent signal amplification theft
Key Fob Issues
Sometimes. Broken buttons can often be fixed by cleaning or replacing the button pad. Cracked cases can be glued. However, water damage or circuit board issues usually require complete fob replacement. Reprogramming is still needed for replacement fobs.
Key Programming
Some vehicles allow DIY key programming using specific sequences (like turning ignition on/off with original keys). However, most modern cars require specialized equipment only locksmiths or dealers have. Check your owner's manual for your specific model.
Key Fob Issues
1) Find the seam and pry open the fob (some have tiny screws) 2) Note battery orientation 3) Remove old battery (CR2032 is most common) 4) Insert new battery 5) Reassemble. Test all buttons - if issues remain, the fob may need reprogramming.
Key Fact: Modern transponder keys have been required in all new US vehicles since 1998

🔑 KEY SERVICES CLASSIFIEDS

Lost Car Key Replacement
$120+
Posted: Apr 23, 2026
Lost all your keys? We can cut and program new ones even without originals. Dealership alternative at 40% less. Proof of ownership required. Serving all major brands.
Call: 820-345-1896
Key Fob Repair & Battery Replacement
$25+
Posted: Apr 29, 2026
Fob not working? We fix broken buttons, replace batteries, and resync to your vehicle. Most repairs done while you wait. Water damage specialists available.
Call: 439-417-1595
Immobilizer System Reset
$95+
Posted: Apr 27, 2026
Fix "key not detected" errors and immobilizer issues. Dealer-level diagnostic equipment. Can often repair without replacing entire system. Free estimates.
Call: 488-301-8069
Transponder Key Duplication
$65+
Posted: Apr 25, 2026
Get spare keys made before you lose yours! Cuts and programs most transponder keys on the spot. Cheaper than dealerships. 15+ years experience.
Call: 411-785-5034
Ads refreshed daily • Licensed professionals • Mobile services available

🔑 Upcoming Key & Immobilizer Services

Seminar
May 16, 2026

Anti-Theft System Demonstration

by Car Key Solutions
Solutions for when all keys are lost - from code pulling to immobilizer resets
Workshop
Apr 30, 2026

Smart Key Programming Class

by Car Key Solutions
Step-by-step instruction for repairing common key fob issues including button and circuit problems
Workshop
May 28, 2026

Anti-Theft System Demonstration

by Locksmith Pro
In-depth class covering push-to-start systems and proximity key programming techniques
Workshop
May 11, 2026

Key Fob Repair Training

by Auto Key Masters
Learn dealer-level programming techniques normally only available at franchise shops

Need immediate service? Call our 24/7 hotline: 1-800-KEY-HELP

Want to list your key service? Join our provider network

Last posts on the forum