LMM wont start

Bako_Dmax

GTO Slayer
Apr 3, 2008
657
0
0
Bako
I installed a dsp5 switch today, the full flash to the dsp5 went fine the truck started and ran fine. It threw two codes related to the DPF I believe so I changed some DTCs in the tune and flashed the tune back in. When I went to start it the truck just clicks and all the lights flicker like it has a dead battery, I put a charger on it the batteries are fine.

Ive tried several flashs and a full flash bakc to stock and its still doing the same thing.

Any ideas?