🛠️ What Tool Do I Need to Work on GM Vehicles?

🚘 Legacy GM Vehicles (Pre-2020)

For GM vehicles built on the Global A platform, most J2534 pass-thru devices worked without issues. You could use tools like:

• DrewTech CarDAQ

• Bosch Mastertech VCI

• Snap-on PassThru Pro

• Autel MaxiFlash

• And others

These tools provided sufficient access for:

• Programming modules via Techline Connect

• Diagnostics with GDS2

• Basic calibrations and re-flashing

⚙️ The Shift to Global B / VIP Platform

Starting around 2020, GM began rolling out its Vehicle Intelligence Platform (VIP) — also known as Global B. This new electronic architecture includes advanced security protocols, higher-speed communications, and stricter software validation.

One critical change: Serial Data Authentication.

✅ The Recommended Tool: MDI 2

To ensure full compatibility with Global B vehicles, GM recommends using its official diagnostic interface:

🔧 GM MDI 2 (Multiple Diagnostic Interface 2)

• OEM-approved and fully supported by GM

• Supports Techline Connect, GDS2, and TIS2Web

• Fully compatible with Serial Data Authentication

• Future-proof for upcoming GM platforms