how hard is it to replace the rear metal brake line on a 99 yukon denali? on 1999 GMC Yukon Denali

the line runs from the front to the back of the truck

Asked by for the 1999 GMC Yukon Denali
I assume you mean the brake line. the gas tank has to be removed to run it along the frame. it pays about 4-5 hours in a shop plus parts.