PCV Valve Location 2013 Buick Lacrosse 3.6?

Tiny
DAVEH6189
  • MEMBER
  • 2013 BUICK LA CROSSE
  • 3.6L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
I had a mechanic tell me that the PCV Valve was stuck in the valve cover and he might need to remove the intake manifold and the valve cover to get it out. Yuck! I decided to give it a try myself since I'm pretty sure I have more time to mess with it than he did. Hard to believe how difficult it is to find out where it is on the engine! Diagrams don't show it. Haynes describes a PCV valve but that's it. See the photo. I removed the tube (blue), but there is no PCV valve in that. I don't think it's the green. Is it somewhere about where the red arrow is? Also, is left and right looking from the driver's side or the front.
Image (Click to make bigger)
Thumb
Saturday, March 14th, 2026 AT 2:15 PM

2 Replies

Tiny
STEVE W.
  • MECHANIC
  • 15,623 POSTS
The tube you removed is the fresh air intake for the PCV system. The fitting you have circled in green is the "outlet" side of the PCV, that is where the crankcase gases come out of the engine to be drawn into the intake and get burned by the engine. Follow that tube down to the valve cover in the rear and you will find a fitting on the valve cover, That is the actual PCV valve. It is called a "hose adapter" in a lot of GM paperwork which is why it gets missed. It should pull out of the grommet in the valve cover and the replacement gets a bit of oil and pushed into the grommet. They get stuck because the rubber shrinks a bit and they get buildup on the area that sticks through the cover. Remove the hose and try to twist while pulling straight out on the valve. Replace it, reinstall the hoses and you are done.
Images (Click to make bigger)
Thumb
Thumb
Was this
answer
helpful?
Yes
No
+1
Saturday, March 14th, 2026 AT 3:41 PM
Tiny
DAVEH6189
  • MEMBER
  • 2 POSTS
Thank you Steve! This site is awesome!
Was this
answer
helpful?
Yes
No
Sunday, March 15th, 2026 AT 10:29 AM

Please login or register to post a reply.