I bought a used 2007 chevy trailblazer 4 WD 4.3 ltr and it appears that the brake lines were recently replaced. I am having problems with the abs kicking in and believe the lines were not routed correctly to the modules. I am having a hard time finding an ABS diagram for 2007. Can anyone help?

So . . . a 4.2L

. . . and what is the ABS doing improperly?

ABS only works when it detects one or more wheels stopping before the other ones do.

Like CC already said, we need more information.