Vortec 5.7 problems

[DmaxHawk]

Trying to tune a 99 Escalade with the 5.7. When I try to flash, it get through the 4 steps of initializing the PCM then stops at setp 1 of 4 when it tries to initailize the bootloader. Then it tells me that it failed because of no response. Whats the problem? Do i have to pull any fuses?

Thanks in advance for the help!

 

[496 BB]

Try charging the battery and make sure all accessories are off. I hadd this happen and just closed out of everything started the truck and drove it for 10 minutes and tried again and all was good. ECM is very sensitive to voltage drops.

 

[DmaxHawk]

Thanks Ill give that a try