Corvette C5 Brake Bleed with VXDIAG VCX NANO GM


“I used my Tech2 clone and performed the “Automated Bleed Procedure” a couple weeks ago. Car is a Cheverolet Corvette C5.
Get this: Drivers Front > Passenger Front > Passenger Rear > Driver Rear!

The other interesting take away was that I bleed my brakes ~2 times per year due to track time with Dot4 (conventional method RR>PR>PF>DF). The fluid always comes out nice and clean-ish. When I performed the Automated Bleed (which cycles the ABS pump), DF looked clean, PF looked clean, PR was a darker amber color(!?), DR looked clean. So, my takeaway from this was that by cycling the ABS pump, it was able to purge a pocket of older fluid that does not get purged using a conventional bleed procedure.

The downside to the Automated Bleed Procedure is that you will use ~2+ (500mL) containers of fluid. Based on this, I will mainly use the conventional method to save on fluid and periodically will use the Automated Bleed Procedure to ensure a complete purge.

The clone I purchased was the: VXDIAG VCX Nano GDS2 and Tech2Win Diagnostic Tool from vxdiagshop. It is a little quirky to get installed but not too bad. I would also suggest if you purchase this device to also purchase an OBD2 extension cord (length of your choosing). Since our OBD2 port faces down and is directly in front of the brake pedal, I found it almost impossible to pump the pedal without bumping the VXDIAG dongle that is plugged into the port (the dongle is like 6″ long). If you bump the dongle enough, it will unplug and then you will need to restart the sequence from the beginning. The weight of the dongle as well can cause it to disconnect.

Once installed, the Automated Bleed Procedure can be found in the Chassis sub menu. With theTech2 you can also turn the ABS pump off/on for testing purposes as well if you didn’t want to burn through a bunch of fluid.”