After a new master cylinder, pads whole way around and a line repair/bleed on our 04 Blazer, the pedal is still spongy. Replaced the check valve also.
I'm at a loss of how to proceed. any help would be greatly appreciated.

 

You have air in the ABS system. Computer has a built in bleed procedure, but you have to have a high end scanner to initiate it.

 

Thanks Les,
All investigation suggested as much.
Thanks for you time and knowledge. I will let you know how it played out.

Thanks,
BomberBilly