TCM Bootloader Download Timeout HELP!

[AJII]

Hey Guys,

I have a problem. Trying to tune a 2007 Silverado. Had flashed the truck successfully several times, and then during one flash the TCM write failed and now I can no longer flash anything.

Engine starts, but won't go over 20mph. Get error code U0101 TCM connection error.

When I try to flash the truck its says TCM recovery, and then "TCM Bootloader Download timeout". In both high and low speed.

I emailed support last night, but I assume they are off weekends, and I need help getting this truck going today!

Thanks for any and all help!

[ccrp]

have that on a 2009 all the time. Disconnect the underhood fuse box and all will be fine.

I have a customers truck who does that all the time during the first flash, after first flash was successful it all is well. Until the next time............

[AJII]

Now it won't even locate the VCM. All fuses are good. i unplugged the underhood fusebox and disconnected the battery. No dice. I'm stumped and it's not my truck so this is what's really bothering me.

Any more suggestions??

[AJII]

Well, had a buddy come by with a 2007 truck, and I cannot connect to his either. However, I can connect to my 2001. So it's a software issue. This makes me feel somewhat better, but I still have a dead truck (that isn't mine!) sitting in my garage.