5 Best OBD-II scanners for General Motors (Chevrolet/GMC/Buick/Cadillac)
From my experience testing GM vehicles, most basic scanners only show engine faults and miss important systems like transmission, ABS, or body control. If you want real diagnostics on Chevrolet, GMC, Buick, or Cadillac, you need a tool that can access every control unit, perform active tests, and support ECU coding or adaptations. The best scanners for GM give you access close to the official Tech2 or GDS2 systems used by dealerships.
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Quick recommendations for GM cars
GM Tech2 / VXDIAG VCX Nano (Dealer Software)
The GM Tech2 and VXDIAG VCX Nano are the official diagnostic solutions for Chevrolet, GMC, Buick, and Cadillac. They provide full OEM-level access, including module programming, ECU coding, and service resets. Works with Tech2Win or GDS2 software on Windows laptops. Perfect for workshops or experienced DIYers who want true dealership-level diagnostics.
Mucar 892BT
The Mucar 892BT is a full-system bi-directional scan tool with the fastest scan speed I’ve tested so far. It supports ECU coding, service resets, and includes free lifetime updates. Works great on all GM brands and other major car manufacturers.
(10% OFF with “CARHACKER” on official website)
Foxwell NT710 for GM
The Foxwell NT710 for GM is a one-brand handheld scanner designed for Chevrolet, GMC, Buick, and Cadillac. It supports full-system diagnostics, bi-directional testing, and basic coding. Includes free lifetime updates and offers dealer-level coverage in a compact format.
Launch Creader GM
The Launch Creader GM is a plug-and-play handheld tool for GM vehicles. It provides full-system fault reading, bi-directional tests, and basic ECU coding. It’s lightweight, fast, and includes free lifetime updates, making it ideal for beginners or as a workshop backup tool.
Mucar 682
Mucar 682 is the most affordable bi-directional scanner that still provides full-system access and 20+ service functions. It performs well on GM vehicles and includes free lifetime updates — perfect for beginners who want a reliable budget tool.
(10% OFF with “CARHACKER” on official website)
My insights after testing 100+ OBD2 tools
I’ve tested literally hundreds of OBD2 scanners, so let me tell you why I find these the best value for money.
? Best OBD2 Scanners for General Motors (2025)
| Scanner | Best For | GM Coding | Bi-Directional Tests | Works on All Brands | Updates | Platform / Type | Price Range |
|---|---|---|---|---|---|---|---|
| GM Tech2 / VXDIAG VCX Nano | OEM-level access & programming | ✅ Full OEM coding/programming | ✅ | ❌ GM only | ⚠️ OEM subscription / varies | Windows laptop / USB | ??? |
| Mucar 892BT | Fastest all-round tool with coding | ✅ ECU coding | ✅ | ✅ | ✅ Lifetime | Android tablet / Bluetooth | ??? |
| Foxwell NT710 (GM) | One-brand handheld with full features | ✅ Basic coding | ✅ | ❌ GM only | ✅ Lifetime | Handheld / wired | ?? |
| Launch Creader GM | Simple handheld use | ✅ Basic coding | ✅ | ❌ GM only | ✅ Lifetime | Handheld / wired | ?? |
| Mucar 682 | Most affordable bi-directional | ⚠️ Basic or none | ✅ | ✅ | ✅ Lifetime | Handheld / Bluetooth | ?? |
✅ Legend:
? = Budget ?? = Mid-range ??? = Professional
✅ = Fully supported ⚠️ = Partially supported or varies ❌ = Not supported
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Best OBD2 scanners in 2025
I constantly test new OBD-II scanners to give you the best options possible. Here is a full list of the best tools in all categories currently.
Hi, which scanner can I use for the Opel? I don’t see Opel brand on your list…
Hi any Thinkcar/Mucar scanner will be good.
I need a scanner that will graph the resistance test for A and B on the throttle body with a P02135 GMC Envoy.
I am not sure if you can read it with OBD2 scanner. ECU knows resistance for A/B but not sure if that is included in live data parameters. If not, then you will not be able to graph it with any scanner. On the other hand if it is in live data, you can use any of these (except vgate)