Hoping someone can offer some advice. I have an 05 Yukon Denali that I recently upgraded using z06 calipers, 15" baer front rotors, 14" rear power slot rotors and goodridge stainless lines. I got all the air out while bleeding using a vacuum bleeder first and a bottle with a hose running into some brake fluid in the bottom and pumping the brake pedal second. I am sure there is no air in the system but my pedal is
as hard as a rock. It uses the hydroboost brake assist system and stops really well but I am concerned that there is something wrong with the brake assist. It feels like old manual brakes with no assist. I have performed several "panic stops" and confirmed that the abs does activate. There are no warning lights or other issues. Thanks for the insight!