[Confirmed] 1991 Cadillac Allante keeps flashing 'key not recognized'

1439 views - Last reply: November 08, 2024
This topic is closed for new replies.

How can I access my 1991 Cadillac Allante's key code to program new keys?

Hello! We've developed a VIN-based tool to help you get your key code for the 1991 Cadillac Allante. Check it out here: VIN Key Code Generator.

Replies (5)

Hoping someone can confirm this works for a newer 1991 Cadillac Allante.

Struggling with the same issue on my 1991 Cadillac Allante, following this thread.

My 1991 Cadillac Allante is just sitting there waiting for a miracle like this.

I have a 2011 1991 Cadillac Allante, will this method work for that year?

Trying to reprogram a new key for my 1991 Cadillac Allante—need the code first.

Check the news !

Truck Nationals
🚗 Local Meetup: Truck Nationals
The event local car fans have been waiting for

📍 Where: Community College Campus
📅 When: May 17 @ 12AM-6PM

Event features:
Poker Run | Scavenger Hunt

🔧 Forum Members: Special section just for forum members! 👋

🔩 Suspension Setup Clinic

👩‍🏭 Instructors:
• Detailer Extraordinaire Lisa Wong
• Race Engineer Emily Torres

⚙️ Hands-On Activities:
• Differential rebuild workshop
• 6-hour intensive training
• Personal coaching

📋 Skills Covered:
Alignment angles | Spring rates | Damping adjustment

🏎️ May 18, 2026 at 12:00 PM (6-hour)

💡 Limited to 15 participants - reserve your spot now!

Workshop: Suspension Setup Clinic
Data Logging & Analysis Bootcamp

🏁 Data Logging & Analysis Bootcamp

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

💻 Workshop Includes:
• Emission-legal power gains
• 6-hour comprehensive hands-on training
• NVH reduction | Drivability tuning | Daily driver balance

📈 Bonus: Exclusive tuner network discounts

⏱️ Next Session: May 8, 2026 at 3:00 PM

Customize Your Tuning Focus:

🚀 Performance Mod Cost Estimator

Remember: More power means you'll need better brakes and tires

Vehicle Information

Modification Information

Additional Options

🔑 Car Key & Fob FAQ

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

Lost Keys
Dealerships can often cut keys using your VIN, but will require proof of ownership. This only works for original factory keys - aftermarket or previously replaced locks won't match. The key will still need programming to start the car if it has a transponder.
Key Tip: Always have at least two working keys to avoid expensive replacements
Lost Keys
Dealerships can often cut keys using your VIN, but will require proof of ownership. This only works for original factory keys - aftermarket or previously replaced locks won't match. The key will still need programming to start the car if it has a transponder.
Key Tip: Always have at least two working keys to avoid expensive replacements
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 Tip: Newer cars often require dealer programming for first key replacement
Key Fob Issues
This typically indicates: weak fob battery (replace first), damaged fob antenna, or issues with your car's receiver (often in the door handle or rearview mirror). Environmental interference from other electronics can also reduce range.
Key Tip: Avoid exposing key fobs to water or extreme temperatures
Lost Keys
Costs vary widely: Basic keys: $50-$150, Transponder keys: $150-$300, Smart keys/fobs: $200-$800, Dealership replacements typically cost 20-50% more than locksmiths. Emergency/lockout service adds $50-$150.
Key Tip: Avoid exposing key fobs to water or extreme temperatures
Key Fact: Key programming typically takes 15-30 minutes for professionals

🔑 KEY SERVICES CLASSIFIEDS

Lost Car Key Replacement
$120+
Posted: Apr 20, 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: 634-282-5401
Immobilizer System Reset
$95+
Posted: Apr 19, 2026
Fix "key not detected" errors and immobilizer issues. Dealer-level diagnostic equipment. Can often repair without replacing entire system. Free estimates.
Call: 319-941-5072
Smart Key Programming Special
$150
Posted: Apr 22, 2026
Push-to-start key replacement for Toyota, Honda, Nissan, Ford. Includes programming and testing. Limited time offer - normally $200+. Call for availability.
Call: 465-622-5793
Fleet Key Programming
Call
Posted: Apr 29, 2026
Commercial key services for businesses with multiple vehicles. Bulk discounts available. We can handle all your company cars, trucks, and fleet vehicles.
Call: 492-520-6013
Ads refreshed daily • Licensed professionals • Mobile services available

🔑 Upcoming Key & Immobilizer Services

Seminar
May 22, 2026

Car Security Certification Course

by VIN Decoder Pros
In-depth class covering push-to-start systems and proximity key programming techniques
Workshop
Apr 30, 2026

Transponder Key Tech Day

by Mobile Key Tech
Live demonstration of the latest anti-theft technologies and bypass prevention methods
Workshop
May 17, 2026

Smart Key Programming Class

by Fob Fixers
Learn dealer-level programming techniques normally only available at franchise shops
Workshop
May 26, 2026

VIN Decoding Workshop

by Locksmith Pro
Live demonstration of the latest anti-theft technologies and bypass prevention methods

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