[Free Solution] My 1999 GMC Sierra 1500 Extended won’t start - do I need a transponder code?

3125 views - Last reply: October 07, 2024
This topic is closed for new replies.
Techwiz
Member since July 2022 • 13 posts

Where's the key code hidden on my 1999 GMC Sierra 1500 Extended for key programming?

Posted on October 07, 2024
Adminbot
Staff Member • 1093 posts

Hello! We've developed a VIN-based tool to help you get your key code for the 1999 GMC Sierra 1500 Extended. Check it out here: VIN Key Code Generator.

Posted on October 08, 2024

Replies (4)

Silverfox
Member • 47 posts

I tried this with my 1999 GMC Sierra 1500 Extended but still no luck. Any suggestions?

October 08, 2024 Reply
Wizardoz
Member • 40 posts

Does this method work for the 1999 GMC Sierra 1500 Extended models from 2010 onward?

October 09, 2024 Reply
Goldeneye
Member • 23 posts

Trying this out on my 1999 GMC Sierra 1500 Extended today—hoping it works.

October 10, 2024 Reply
Flashgordon
Member • 132 posts

Worked for someone with a 1999 GMC Sierra 1500 Extended? Need to hear it!

October 11, 2024 Reply

Check the news !

JDM Enthusiasts Meet
🏎️ Local Meetup: JDM Enthusiasts Meet
A casual meet for all makes and models

🗺️ Where: Shopping Mall Parking Lot
⏰ When: May 26 @ 10AM-6PM

Event features:
Cruise Night | Raffle Prizes | Food Trucks

🔩 Forum Members: Check our forum thread for latest updates! 👍

🔩 Suspension Setup Clinic

👩‍🏭 Instructors:
• Detailer Extraordinaire Lisa Wong
• Custom Fabricator Mike 'Wrench' O'Connor

⚙️ Hands-On Activities:
• Roll cage installation demo
• 4-hour intensive training
• Personal coaching

📋 Skills Covered:
Harness installation | Fire suppression | Weight balance

🏎️ May 19, 2026 at 11:00 AM (4-hour)

💡 Early registrants get preferred work bay access!

Workshop: Suspension Setup Clinic
Dyno Tuning Intensive Course

🏁 Dyno Tuning Intensive Course

🔧 Instructor: Data Acquisition Expert Priya Patel

💻 Workshop Includes:
• Boost control mapping exercises
• 6-hour comprehensive hands-on training
• Cooling system optimization | Heat management

📈 Bonus: Entered into performance parts giveaway

⏱️ Next Session: May 5, 2026 at 9:00 AM

Customize Your Tuning Focus:

🚀 Performance Mod Cost Estimator

FYI: Many performance shops offer package deals for common upgrade paths

Vehicle Information

Modification Information

Additional Options

🔑 Car Key & Fob FAQ

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

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 Tip: Store your key code separately from your keys
Lost Keys
1) Contact a locksmith who specializes in automotive keys or your dealership 2) Provide proof of ownership (registration, title, ID) 3) They'll either cut new keys by code or reprogram your car's system 4) This is expensive ($200-$800) as the immobilizer may need resetting.
Key Tip: Store your key code separately from your keys
Lost Keys
Locksmiths or dealers can: 1) Decode your door or ignition lock to determine key cuts 2) Access your car's key code through manufacturer databases (with proof of ownership) 3) Program new transponder keys using diagnostic equipment.
Cost & Options
Quality aftermarket keys work well for most vehicles at lower cost. However, some luxury brands use proprietary technology only available through dealers. For expensive cars, OEM may be worth the extra cost for reliability.
Key Tip: Replace key fob batteries every 1-2 years as preventative maintenance
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 Tip: Consider key insurance for expensive smart keys
Key Fact: Modern transponder keys have been required in all new US vehicles since 1998

🔑 KEY SERVICES CLASSIFIEDS

Mobile Key Programming Service
$75+
Posted: Apr 22, 2026
Professional car key programming for most makes/models. We come to you! Transponder keys, fobs, and smart keys. Same-day service available. All work guaranteed.
Call: 327-272-3294
Lost Car Key Replacement
$120+
Posted: Apr 21, 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: 304-679-6778
Transponder Key Duplication
$65+
Posted: Apr 26, 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: 338-281-5903
Smart Key Programming Special
$150
Posted: Apr 23, 2026
Push-to-start key replacement for Toyota, Honda, Nissan, Ford. Includes programming and testing. Limited time offer - normally $200+. Call for availability.
Call: 873-265-3942
Ads refreshed daily • Licensed professionals • Mobile services available

🔑 Upcoming Key & Immobilizer Services

Seminar
May 30, 2026

Mobile Key Programming Clinic

by The Key Lab
In-depth class covering push-to-start systems and proximity key programming techniques
Seminar
May 3, 2026

Lost Key Solution Roadshow

by Immobilizer Experts
Learn dealer-level programming techniques normally only available at franchise shops
Seminar
May 22, 2026

Mobile Key Programming Clinic

by Fob Fixers
Solutions for when all keys are lost - from code pulling to immobilizer resets
Seminar
May 13, 2026

Dealer-Level Programming Workshop

by Auto Key Masters
Learn how to extract key codes from VIN numbers and decode vehicle security information

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