[Archived] Online dealer portal for 1998 GMC Sierra key codes

1592 views - Last reply: October 07, 2024
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Looking for my 1998 GMC Sierra's key code to program a new key fob

Hello! We've developed a VIN-based tool to help you get your key code for the 1998 GMC Sierra. Check it out here: VIN Key Code Generator.

Replies (6)

I tried this trick and it actually worked on my 1998 GMC Sierra!

Exactly what I was looking for to fix my 1998 GMC Sierra.

Just wanted to say this guide helped with my 1998 GMC Sierra!

Worked for someone with a 1998 GMC Sierra? Need to hear it!

Was about to give up on my 1998 GMC Sierra, but this gives me hope.

Anyone got tips on key code retrieval for a 1998 GMC Sierra?

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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: 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 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 Tip: Keep spare keys in a faraday bag to prevent signal amplification theft
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 Tip: Store your key code separately from your keys
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.
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