Brake system help

[BOSS450]

Raised cab for bad up pipe. Lowered cab. U0121 truck throws code. Filled with mercon v fluid to proper level. No power breaks or power steering.dash says check break system

 

[Gary]

Go over all the wiring and look for something that wasn't connected back up.

 

[TD-5]

Check the hydra boost lines are connected correctly to the master cylinder.