[Solved] Do you need a code when changing BCM in 2003 Chevrolet Avalanche 1500?

1162 views - Last reply: November 19, 2024
This topic is closed for new replies.
Neonlights
Member since October 2021 • 71 posts

Trying to program a spare key - where's the key code on my 2003 Chevrolet Avalanche 1500?

Posted on November 19, 2024
Adminbot
Staff Member • 920 posts

Hello! We've developed a VIN-based tool to help you get your key code for the 2003 Chevrolet Avalanche 1500. Check it out here: VIN Key Code Generator.

Posted on November 20, 2024

Replies (6)

Warpspeed
Member • 114 posts

Can’t believe this worked on my 2003 Chevrolet Avalanche 1500. Huge thanks!

November 20, 2024 Reply
Karmapolice
Member • 12 posts

Following closely—this could be the fix I need for my 2003 Chevrolet Avalanche 1500.

November 21, 2024 Reply
Hotwheels
Member • 78 posts

I have the same 2003 Chevrolet Avalanche 1500 and I'm also trying to find the key code.

November 22, 2024 Reply
Skywalker
Member • 82 posts

I tried this with my 2003 Chevrolet Avalanche 1500 but still no luck. Any suggestions?

November 23, 2024 Reply
Bluesteel
Member • 133 posts

I’ll try this and update how it goes with my 2003 Chevrolet Avalanche 1500.

November 24, 2024 Reply
Shadowfax
Member • 135 posts

I’ll try this and update how it goes with my 2003 Chevrolet Avalanche 1500.

November 25, 2024 Reply

Check the news !

Classic & Vintage Car Rally
🏎️ Local Meetup: Classic & Vintage Car Rally
Where car culture comes alive in your community

🗺️ Where: Waterfront Drive
⏰ When: May 14 @ 12AM-8PM

Event features:
Judged Show | People's Choice Awards

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

🧰 Brake System Masterclass

👨‍🏫 Instructors:
• Master Technician Carlos Rodriguez (20+ years experience)
• 4x4 Builder Mark Jensen

🔌 Hands-On Activities:
• Suspension geometry setup
• 6-hour intensive training
• Personal coaching

📅 Skills Covered:
Multimeter use | Wiring diagrams | Short circuit tracing

🚙 May 21, 2026 at 11:00 AM (6-hour)

✨ Take home custom workshop manual!

Workshop: Brake System Masterclass
Performance Engine Building 101

🔋 Performance Engine Building 101

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

📱 Workshop Includes:
• Data interpretation techniques
• 4-hour intensive hands-on training
• Turbo sizing | Intercooling | Wastegate control

📉 Bonus: Live Q&A replay available

🔌 Next Session: May 5, 2026 at 3:00 PM

Customize Your Tuning Focus:

🚀 Performance Mod Cost Estimator

Insight: Suspension mods should match your intended use (street vs track)

Vehicle Information

Modification Information

Additional Options

🔑 Car Key & Fob FAQ

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

Lost Keys
Yes, a skilled auto locksmith can extract the broken key and make a replacement. They can often do this without damaging the ignition cylinder. The new key will need programming if it has a transponder chip.
Key Tip: Always have at least two working keys to avoid expensive replacements
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.
Cost & Options
1) Always have at least 2 working keys 2) Get spares made before losing originals 3) Consider key insurance/add-on coverage 4) Store key codes safely 5) Use protective cases for smart keys 6) Program new keys before old ones fail completely.
Key Tip: Some locksmiths offer mobile key programming services
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.
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 Fact: The average driver will lose 1-2 car keys during ownership

🔑 KEY SERVICES CLASSIFIEDS

Immobilizer System Reset
$95+
Posted: Apr 26, 2026
Fix "key not detected" errors and immobilizer issues. Dealer-level diagnostic equipment. Can often repair without replacing entire system. Free estimates.
Call: 770-851-3191
Smart Key Programming Special
$150
Posted: Apr 28, 2026
Push-to-start key replacement for Toyota, Honda, Nissan, Ford. Includes programming and testing. Limited time offer - normally $200+. Call for availability.
Call: 360-831-4008
Anti-Theft System Repair
$85+
Posted: Apr 26, 2026
Fixing security light issues, PATS systems, and ignition immobilizers. Proper diagnosis before repair. Most vehicles serviced same day. Warranty on all work.
Call: 973-882-0988
Key Fob Case Replacement
$35
Posted: May 1, 2026
Cracked or damaged fob housing? We transfer your electronics to a new case. Multiple color options available. Most models in stock. 15-minute service.
Call: 208-206-9447
Ads refreshed daily • Licensed professionals • Mobile services available

🔑 Upcoming Key & Immobilizer Services

Workshop
May 10, 2026

Smart Key Programming Class

by Locksmith Pro
Become certified in vehicle security systems with our intensive 2-day course
Seminar
May 18, 2026

Mobile Key Programming Clinic

by Fob Fixers
Comprehensive guide to troubleshooting and resetting immobilizer systems in modern vehicles
Seminar
May 14, 2026

VIN Decoding Workshop

by Mobile Key Tech
Learn dealer-level programming techniques normally only available at franchise shops
Seminar
May 6, 2026

VIN Decoding Workshop

by Immobilizer Experts
Solutions for when all keys are lost - from code pulling to immobilizer resets

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