Brake cooling duct
Thread Starter
Racer
Joined: Mar 2012
Posts: 420
Likes: 9
From: Bow New Hampshire
Brake cooling duct
While replacing the brakes on my 05, Z51, I noticed the right front cooling duct was missing. I ordered a new one and found it is different from the left side. The inside wheelwell end of the duct is closed with about an 1 inch hole in it, whereas the one on the left side is completely open. Is this whe way it came from the factory or has there been a design change and I have the newer issue. Sorry about lack of a photo but I can't find my camera. Thanks
Race Director
Joined: Oct 2010
Posts: 14,475
Likes: 785
From: Las Vegas NV
I have the same car and mine is open on both sides. Did you check to make sure the plastic duct isn't just disconnected from the wheel well cover and not bouncing around behind it? That happened to mine when I changed the fog lights I didn't secure it right and it came loose.
Drifting
Joined: Feb 2012
Posts: 1,796
Likes: 37
From: skiatook oklahoma
Is that part #3 on this link? it's showing different part numbers for lh and rh..
http://parts.nalleygmc.com/showAssem...rchString=duct
this may ot maynot be the part... (i have trouble with the parts search)
http://store.gmpartshouse.com/parts/...&siteid=214638
http://parts.nalleygmc.com/showAssem...rchString=duct
this may ot maynot be the part... (i have trouble with the parts search)
http://store.gmpartshouse.com/parts/...&siteid=214638
Last edited by ChevyDave; Apr 25, 2012 at 09:44 PM.
Thread Starter
Racer
Joined: Mar 2012
Posts: 420
Likes: 9
From: Bow New Hampshire
Sorry for the delay, it is #3, part #15252919 What I am not sure is if the representative picture is for that part number. My left side is wide open whereas the new one for the right side looks like the picture! So I am really confused!
Burning Brakes
Joined: Nov 2008
Posts: 940
Likes: 1
From: Long Island NY
My 08 Z51 has the openings the same size as the duct. My mom's 09 NON Z51 has small holes on the ends of the ducts. Don't know if it was a year to year change or a Z51 vs non Z51 change but maybe this info will help you.
Drifting
Joined: Feb 2012
Posts: 1,796
Likes: 37
From: skiatook oklahoma
best i can tell, there are 2 different sets, one is marked as Z51 and other as J55. see #3 (4 of them , 2 lefts and 2 rights, J55 & Z51)..
http://parts.nalleygmc.com/showAssem...rchString=duct
http://parts.nalleygmc.com/showAssem...rchString=duct
Burning Brakes
Joined: Sep 2009
Posts: 959
Likes: 3
From: Hartford CT
Yes z51s have the open ducts, nonz51 has the ducts with 1" holes. I read somewhere this has something to do with the aero targets for the base car. I think the base car has a slightly lower drag rating and can go a little faster. The z51 was made for autocross, non high speed. That being siad there is no piratical difference except the z51 has better brake cooling.
