9C3 trunk release

Electronic systems, stereo and Holden iQ, wiring, it all goes here....
Navy Lifer
Administration Staff
Posts: 1504
Joined: Tue Mar 19, 2013 11:30 pm
Location: Canton GA

Re: 9C3 trunk release

Post by Navy Lifer » Tue Jun 25, 2013 1:08 pm

Update - done, works great, remains to be determined whether a relay will be added
Navy Lifer wrote:
I have a couple of harness and switch options - one harness is G8, the other is PPV, just so I could see what the interface is between the release button behind the compartment door BEFORE tearing things apart--the parts weren't expensive, so it's worth it for the knowledge base. There is a second button option, just don't recall where it came from as a source.

Here are the PN's:

92172574 harness (G8) Parts group 2.480 - I/P Compt Lp (Lamp?) wiring - includes connector for trunk release button

92056727 pb switch (G8)

Given the mention of the amperage draw of the trunk release actuator, and that use of the RKE release command means that the BCM is involved, is the in-compartment release button, when pushed, going to function as it does in G8, or is this a situation that calls for a change (software code) in the BCM flash program?
In addition to the parts above, the trim cover--identified as a CAP (Parts Group 10.260) for G8--is PN 92171692. This cover is a mirror image part (for LHD dash configuration) to the one pictured. in ZerOne's post.

We used the G8 parts listed, and had to add a male connector pin "borrowed" from the harness connector for the PPV in-car harness that is now removed (connections behind right footwell panel). The G8 glove box harness has 3 wires, including an orange "hot" wire, which was added to the existing PPV body harness connector in the appropriate grid position to mate with the G8 harness pin. It's a little more complicated than what these pictures show (as alluded to in Tom's writeup re: wiring mods) but the car now has an always hot trunk release inside the glove box as well as the key-controlled release on the console (and the the RKE release option, of course).
trunk release 2.jpg
view prior to installing G8 harness on storage compartment in place of PPV harness--adds connections for release switch--swap out is easy
trunk release 2.jpg (47.89 KiB) Viewed 4631 times
trunk release 1.jpg
release button installed in compartment - pre-existing hole behind blank plate/cap, 2 leads on harness connect to switch
trunk release 1.jpg (42.45 KiB) Viewed 4631 times
trunk release 6.JPG
G8 cap with release symbol and provision for pushbutton
trunk release 6.JPG (50.86 KiB) Viewed 4631 times
trunk release 3.JPG
back view of cap showing "LHD" - for compartment on right side - marking and PN verification
trunk release 3.JPG (48.53 KiB) Viewed 4631 times
trunk release 5.JPG
completed installation
trunk release 5.JPG (41.32 KiB) Viewed 4631 times
Last edited by Navy Lifer on Sun Jul 19, 2015 4:51 pm, edited 1 time in total.
Reason: fix pictures

User avatar
storm9c1
Posts: 388
Joined: Wed Mar 27, 2013 11:47 pm
Location: Pittsburgh, PA

Re: 9C3 trunk release

Post by storm9c1 » Sat Jul 13, 2013 5:44 pm

Looks great. My hidden button has been working great as well.
Tom (AKA: Storm)
2011 Caprice 9C3: L77, 7K miles, first-owner, purchased July 2011.
1995 Caprice 9C1: LT1, 176K miles, summer car.
1995 Impala SS: LT1, 20K miles.
1995 Caprice Wagon: LT1, 61K miles.
1995 Caprice Wagon: LT1, 128K miles. Rust In Pieces
1994 Caprice 9C1: LT1, 101K miles, winter car.
1969 Chevy C30: 383ci stroker, 4L80E, rollback car hauler.
1972 Chrysler Newport: 400ci big block, 27K miles, 2-door hardtop.
1969 Dodge Charger: 383ci big block.

Twotonfun
Posts: 30
Joined: Sun Nov 17, 2013 4:34 pm

Re: 9C3 trunk release

Post by Twotonfun » Sat Jul 18, 2015 3:57 am

Having too locked my keys in the trunk of my 9c3 I was very interested in trying this modification and it worked great.

I took it one step further and tapped into the blue wire in the existing trunk release switch and found that it will release the trunk just fine and there was now no need for placing an additional switch or drilling holes. :mrgreen:

I suppose that this will make it easier should some one break into my car to get into the trunk so I will probably start searching for a stealthy place to hide a switch.

Andy

Twotonfun
Posts: 30
Joined: Sun Nov 17, 2013 4:34 pm

Re: 9C3 trunk release

Post by Twotonfun » Sat Jul 18, 2015 9:37 pm

Ordered switch from local Chevy dealer. 10.00 plus change.

CrashTestDummy
Posts: 1767
Joined: Sat Feb 07, 2015 8:31 pm
Location: Pearland, Texas

Re: 9C3 trunk release

Post by CrashTestDummy » Sun Jul 19, 2015 4:38 am

Twotonfun wrote:Having too locked my keys in the trunk of my 9c3 I was very interested in trying this modification and it worked great.

I took it one step further and tapped into the blue wire in the existing trunk release switch and found that it will release the trunk just fine and there was now no need for placing an additional switch or drilling holes. :mrgreen:

I suppose that this will make it easier should some one break into my car to get into the trunk so I will probably start searching for a stealthy place to hide a switch.

Andy
Having a 95 9C1 that actually got broken into, and a 95 AND 96 Impala SS with a trunk release accessible from the passenger compartment (the 9C1is right on the dash) , I wouldn't worry about 'steathifying' your trunk release. If someone broke into your car, and discovered that button, they'd probably press it just to see what it got them.
Gene Beaird,
Pearland, Texas
2012 Caprice 9C1
1992 B4C 1LE Camaro
2010 Tahoe PPV (her car)
1995 DGGM Impala SS
1996 BBB Impala SS (11-second DD)
1985 Firebird - 310 LS1 C Prepared autocross car.
And some others
Do YOU have my SPID?

Navy Lifer
Administration Staff
Posts: 1504
Joined: Tue Mar 19, 2013 11:30 pm
Location: Canton GA

Re: 9C3 trunk release

Post by Navy Lifer » Sun Jul 19, 2015 5:02 pm

FINALLY fixed the corrupted photos in my 2-year old post.

The security aspects of my install may be questionable--it's not clear which years do or do not have a locking glove box/storage compartment, and even if so (mine does) I don't carry the key, typically, and have never locked that compartment. No different than the standard installations of trunk release mechanisms of the past, but in the case of the PPV, it's probably a good idea.

Maybe I should put the storage compartment latch key in the car so I would at least be able to lock it and take the key with me when the situation calls for it. Won't stop a determined thief, in all likelihood, but it could slow them down.

StevenJay
Posts: 38
Joined: Sun Oct 29, 2017 3:43 am
Location: Lake County Illinois

Re: 9C3 trunk release

Post by StevenJay » Fri Jun 08, 2018 6:58 pm

My 2014 9C1 trunk button is active on both doors ALL the time. In the TSB's for the caprice it does show trunk release as a configurable option through sps programming. There's got to be a way to program it either way with an MDI. My build sheet shows ignition controlled trunk release so I dont know. There's no guns in my trunk so I'm ok with it right now. Im curious though.
Steven J.
-2014 Chevy Caprice PPV-Switchblade silver metallic(my car)-purchased 11/2017 @1200 miles from Burbank, IL
-2017 Chevy Caprice PPV- Switchblade silver metallic(Dad's car) purchased 1/2018 @ 500 miles from New York

smwalker
Posts: 1407
Joined: Mon Jul 29, 2013 6:44 am
Location: Azusa,CA
Contact:

Re: 9C3 trunk release

Post by smwalker » Fri Jun 08, 2018 10:45 pm

I don't know the service manual states it cannot be programmed for any years (they are quick to break out 14+ models on this chart for other options). So if my 11 cant do it with out the key on then your 14 should not be able to either. Unless this chart is wrong. As you said if you see it on the SPS menu maybe it is possible.

Or the folks before you wired it up somehow. it works with your key FOB correct?

Image

And as I look at the SPS BCM programming options I only see 4 things that can be programmed and those line up with what the service manual states:

DRL
Rear Window Inop
Aux Battery
Theft Alarm

Here is the SPS screen:
Image
Steve Walker
Azusa, CA
'11 PPV 9C3 Huron White

Post Reply