Help truck cranks fires then dies instanly after dsp install

[johnj]

I just put a dsp five switch on a 02 duramax an now the truck wont start and there is no communication thru the obd port. The v2 wont even power up. I checked the cigar liter fuse and it was good. The truck will crank over start for maybe a second and then dies. Please help

[vortecfcar]

Does it have this O.S. by chance?
http://forum.efilive.com/showthread....-and-SES-light