GLI on 08 Z06
Thread Starter
Instructor
Joined: Jun 2003
Posts: 158
Likes: 0
From: Somewheres in FL
GLI on 08 Z06
Stock bose radio, 08 Z06, getting alternator whine. I got some GLIs, but don't see any RCAs to hook up to. Do I need an adapter harness? Or am I just missing the RCAs?
Tech Contributor
Joined: May 2003
Posts: 7,035
Likes: 134
From: North Augusta, SC
GLI's are a fix for aftermarket radios with whine, not all-stock systems.
If you really want to try them on a stock radio you could buy one of THESE and splice the GLI's into the proper wires.
Has the whine always been there, or did it just start?
If you really want to try them on a stock radio you could buy one of THESE and splice the GLI's into the proper wires.
Has the whine always been there, or did it just start?
Thread Starter
Instructor
Joined: Jun 2003
Posts: 158
Likes: 0
From: Somewheres in FL
GLI's are a fix for aftermarket radios with whine, not all-stock systems.
If you really want to try them on a stock radio you could buy one of THESE and splice the GLI's into the proper wires.
Has the whine always been there, or did it just start?
If you really want to try them on a stock radio you could buy one of THESE and splice the GLI's into the proper wires.
Has the whine always been there, or did it just start?
The whine has always been there. The whole system is completely stock with no alterations. I took it to the dealer when I first got it and they were going to cut some wires and do something.........and I bailed. Didn't want them cutting wires. I'm over it now though, if I need to splice something in, so be it.
I was hoping for an easy install, with a harness adapter. This is the one?
Tech Contributor
Joined: May 2003
Posts: 7,035
Likes: 134
From: North Augusta, SC
Are you sure it's alternator whine, does it change pitch with engine RPM?
You could just splice GLI's into stock wires, but that's a big leap not knowing if it will fix the issue.
The Add-GM24 would plug in at the back of the radio, then allow oem C1 plug to connect to it. That would allow you to splice GLI's in to adapter on a workbench, then put them in car as a plug-n-play mod that can easily be reversed. You could even put RCA plugs/jacks on the Add-GM24 to avoid cutting the GLI's if you want to.
C6 prints are HERE, the wires you'd need to put GLI's on are plug C1, pins A8-11 and B8-11
You could just splice GLI's into stock wires, but that's a big leap not knowing if it will fix the issue.
The Add-GM24 would plug in at the back of the radio, then allow oem C1 plug to connect to it. That would allow you to splice GLI's in to adapter on a workbench, then put them in car as a plug-n-play mod that can easily be reversed. You could even put RCA plugs/jacks on the Add-GM24 to avoid cutting the GLI's if you want to.
C6 prints are HERE, the wires you'd need to put GLI's on are plug C1, pins A8-11 and B8-11
Thread Starter
Instructor
Joined: Jun 2003
Posts: 158
Likes: 0
From: Somewheres in FL
I guess it is. It does go up with engine RPM. I'll prob just cut the RCAs off and solder them inline. Each GLI has two jacks. I guess each wire (8) will need it's own jack/lead. So I need 4 GLIs?
Tech Contributor
Joined: May 2003
Posts: 7,035
Likes: 134
From: North Augusta, SC
2 GLI's, each one has 2 channels, 2 wires per channel. + wire is center of RCA plug, - is outer contact. Make sure the cables are long enough to let you stuff them behind/under the radio, it's kinda cramped back there.
Thread Starter
Instructor
Joined: Jun 2003
Posts: 158
Likes: 0
From: Somewheres in FL
Ah I see. Thanks. Any recs for RCA plugs? I think radio shack is out of business.
I read somewhere that one guy also had to put a GLI on the subwoofer circuit, but maybe my stock system doesn't have that?
I also read where one guy said his was a bad ground on the on star unit. I guess I should check those things (along w grounding head unit to frame?) prior to starting this w the GLIs.
I read somewhere that one guy also had to put a GLI on the subwoofer circuit, but maybe my stock system doesn't have that?
I also read where one guy said his was a bad ground on the on star unit. I guess I should check those things (along w grounding head unit to frame?) prior to starting this w the GLIs.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Thread Starter
Instructor
Joined: Jun 2003
Posts: 158
Likes: 0
From: Somewheres in FL
I think I'll try providing the same ground to the C2 plug A12 and the amp. In looking at the amplifier plug, X1, there appears to be two ground wires, one on pin A and one on pin F. I find it odd though that the pin A also has a right front subwoofer speaker pos lead. I'd think that would be a short.
Thread Starter
Instructor
Joined: Jun 2003
Posts: 158
Likes: 0
From: Somewheres in FL
Ran a new ground from the battery to the Bose amp and the head unit. No more whine. This has plagued me for 6 yrs. Wish I had done it a long time ago.
I was confused by the diagram of the amp plug X1 in the svc manual. Turns out the ground is on pin A if you have the 5 speaker system, and on pin F if you have the 7 speaker system.
I was confused by the diagram of the amp plug X1 in the svc manual. Turns out the ground is on pin A if you have the 5 speaker system, and on pin F if you have the 7 speaker system.
