Re: codes 171,174 need help on fix '04 deville base
It's tight - you need to remove the P/S pump for work room, and you'll need to pull the PCV piping apart using long needlenose pliers. If you can't find the original couplings in www.nalleygmc.com or on the Help ! racks at large parts stores the entire line - couplings, plastic pipe, etc, can be replaced by a proper sized length of reinforced fuel hose from any parts store. Your/our PCV uses a fixed orifice rather than the old PCV "rattle valve".
Maybe more in my albums - click my username, open the profile. Left column, Albums - 2 albums, 6 pages of late Northstar stuff.
Here's some additional homework .............
https://www.google.com/search?q=cadillac+forums+northstar+2002+pcv+leak&ie=utf-8&oe=utf-8
It's tight - you need to remove the P/S pump for work room, and you'll need to pull the PCV piping apart using long needlenose pliers. If you can't find the original couplings in www.nalleygmc.com or on the Help ! racks at large parts stores the entire line - couplings, plastic pipe, etc, can be replaced by a proper sized length of reinforced fuel hose from any parts store. Your/our PCV uses a fixed orifice rather than the old PCV "rattle valve".
Maybe more in my albums - click my username, open the profile. Left column, Albums - 2 albums, 6 pages of late Northstar stuff.
Here's some additional homework .............
https://www.google.com/search?q=cadillac+forums+northstar+2002+pcv+leak&ie=utf-8&oe=utf-8