My truck has a 5.3liter engine 4x4 1/2 ton, about two years ago a deer had hit the driver side of the bed, body shop did an excellent job of reparing but now i have a vaccum leak that i didnt have before, service engine light is on and it idles rough and there is a loss of power, before i start following the diagnostics machine and start swapping out parts, til i find it, i would like to chase down the vaccum system and see if its just a line that has popped off some where.