ECM relearn procedure and VIN

[chevy052500hd]

Interesting, if I do this with any P10 TrailBlazer it always messes up the flash. I have to shut the doors, kill the AHLs, radio/HVAC off then it works fine every time (unless there's an aftermarket HU messing up the data comms).

I was speaking of vats relink, sorry should have specified, as far as flashing goes I usually keep doors closed and flash away, unless an aftermarket radio is installed then pull the radio fuse. I will keep that inmind if I am flashing a trailblazer

[ScarabEpic22]

I was speaking of vats relink, sorry should have specified, as far as flashing goes I usually keep doors closed and flash away, unless an aftermarket radio is installed then pull the radio fuse. I will keep that inmind if I am flashing a trailblazer

Ah my mistake, never had to do a VATS relearn so I have no idea. Good to know though, if I have problems Ill remember this.

Even removing the stereo fuse doesnt always make the flash work on certain aftermarket HUs, no idea why but its a start for sure.