═══════════════════════════════════════════
Original Lishi Decoder GM25R
═══════════════════════════════════════════
Original Lishi GM25R decoder tool for General Motors pin tumbler lock cylinders.
This professional automotive locksmith decoder reads pin depths within GM25R-profile
locks to generate accurate working key codes. Designed for locksmiths working on
select GM vehicles. Note: this is a decoder-only tool — a separate pick tool is
required for the picking function. Compatible with older GM door, ignition, and
trunk locks using the GM25R cylinder profile.
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🔧 Technical Specifications
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Brand Original Lishi
Model GM25R
Type Decoder (Decoder-only)
Lock Type GM25R Pin Tumbler (General Motors)
Application Automotive Locksmith, GM Vehicles
Note Pick tool sold separately
Condition New
SKU Lishi-T139
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
✅ Compatibility
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
✅ GM vehicles with GM25R cylinder (door locks)
✅ GM25R ignition locks
✅ GM25R trunk / rear compartment locks
✅ Select older Chevrolet, GMC, Cadillac, Buick models
⚠️ Decoder-only — a separate pick is needed to lift pins before decoding.
⚠️ For professional use only — requires locksmith training.
⚠️ Verify your lock uses the GM25R profile before purchasing.
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🔑 How to Use
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
1. Confirm the lock uses the GM25R profile (check keyway shape and code).
2. Use a compatible Lishi pick tool (or standard lock pick) to lift all pins
to the shear line.
3. Insert the GM25R decoder alongside the pick to read pin depths.
4. Note each pin's depth code as indicated on the decoder scale.
5. Convert the decoded depths to a key bitting code.
6. Cut a new key or generate a code-compliant replacement key.
7. Test the cut key in the lock and remove both tools.
(Refer to official Lishi training materials for GM25R-specific decoding procedures.)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
📦 What's Included
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
• 1× Original Lishi GM25R Decoder Tool
• Protective sleeve packaging
• Note: Lishi pick tool not included
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🚚 Shipping & Warranty
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
✅ Free shipping on orders over $100
✅ 5–7 business days delivery
✅ 1-Year Free Return policy
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
❓ Frequently Asked Questions (FAQ)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Q1: What is the GM25R profile?
A: GM25R is a General Motors pin tumbler lock cylinder profile used in older GM vehicles. It is a 5 or 6-pin system found in select Chevrolet, GMC, Cadillac, and Buick models primarily from the 1990s and early 2000s. The "25R" designation refers to the specific wafer-tumbler configuration.
Q2: Is this a 2-in-1 tool or just a decoder?
A: This is a decoder-only tool. The GM25R Lishi is designed exclusively for reading pin depths. A separate pick tool (such as a compatible Lishi 2-in-1 or standard lock pick) is required to lift the pins before decoding.
Q3: Which GM vehicles use the GM25R lock?
A: The GM25R profile appears in select GM vehicles including some 1990s–2000s Chevrolet, GMC, Cadillac, and Buick models. Specific applications include door locks, ignition locks, and trunk locks. Always verify the lock code on the cylinder or original key.
Q4: Do I need special training to use this decoder?
A: Yes — this is a professional locksmith tool. Familiarity with pin tumbler mechanisms and lock decoding techniques is required. Original Lishi offers official training programs for this and other decoder models.
Q5: Can this tool cut keys directly?
A: No — this is a decoder. It reads pin depths to help generate a key code, which can then be used to cut a new key. It does not cut keys directly.
Q6: What pick tool works with the GM25R decoder?
A: Standard lock picks or compatible Lishi pick tools can be used alongside the GM25R decoder. Consult Lishi compatibility charts to pair with the appropriate pick for your specific lock.
Q7: What is the return policy?
A: Locksmith Mall offers a 1-Year Free Return if the tool does not match your lock type or arrives defective. Verify lock compatibility before ordering.
Q8: Is this tool legal to own?
A: In most U.S. states, lock pick tools are legal for licensed locksmiths and law enforcement. Laws vary by state — verify your local regulations before purchasing.
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
📌 Related Products
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
► Original Lishi 2-In-1 Pick and Decoder HU101 (Ford) | Lishi-T101 | $29.00
https://www.locksmithmall.com/collections/lishi-tools
► Original Lishi 2-In-1 Pick and Decoder SC4 (Toyota/Lexus) | Lishi-T103 | $29.00
https://www.locksmithmall.com/collections/lishi-tools
► Original Lishi 2-In-1 Pick and Decoder Sargent SAR21R | Lishi-T127 | $39.00
https://www.locksmithmall.com/products/119
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Lishi-T139 | GM25R | Original Lishi
For General Motors Vehicles — Decoder Only (Pick Sold Separately)
Professional Use Only
═══════════════════════════════════════════
-560x560.jpg)
-560x560.jpg)
