C8 Tech/Performance Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by: CARiD

Convertible rear window adjustment

Thread Tools
 
Search this Thread
 
Old Nov 12, 2023 | 04:20 PM
  #1  
spearfish25's Avatar
spearfish25
Thread Starter
Melting Slicks
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Apr 2016
Posts: 3,169
Likes: 861
From: Naples FL
Default Convertible rear window adjustment

Noticing my 2023 convertible rear window doesn’t fully close. The upper edge stops just at the gasket but doesn’t seat that extra 1/4” or so into it to make a good seal.

Does anyone know if there is a simple adjustment or re-indexing procedure for this back window? The dealer will get it eventually for a few other items to address but I’d prefer not to garage it or risk a leak until it goes in.
Reply
Old Nov 12, 2023 | 05:07 PM
  #2  
gnt's Avatar
gnt
Junior Member
Veteran: Air Force
All Eyes On Me
Liked
Community Favorite
 
Joined: Sep 2019
Posts: 201
Likes: 95
From: DFW
USAF
Default

First I would cycle the top down and then back up and hold the button until you get the message that it is complete. If that doesn’t do it follow the programming procedure.




Reply
Old Nov 12, 2023 | 05:18 PM
  #3  
spearfish25's Avatar
spearfish25
Thread Starter
Melting Slicks
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Apr 2016
Posts: 3,169
Likes: 861
From: Naples FL
Default

Originally Posted by gnt
First I would cycle the top down and then back up and hold the button until you get the message that it is complete. If that doesn’t do it follow the programming procedure.




Thanks. Gave it a try and no joy. Issue persists.

Reply
Old Nov 12, 2023 | 05:23 PM
  #4  
gnt's Avatar
gnt
Junior Member
Veteran: Air Force
All Eyes On Me
Liked
Community Favorite
 
Joined: Sep 2019
Posts: 201
Likes: 95
From: DFW
USAF
Default

Unfortunately the RH cable on my top broke today so I’m unable to look at mine and give you measurements. I’m headed to the dealership on Wednesday.

Can you see an air gap between the window and seal?
Reply
Old Nov 12, 2023 | 08:08 PM
  #5  
Red Mist Rulz's Avatar
Red Mist Rulz
Race Director
Community Builder
Loved
Community Favorite
Top Answer: 1
 
Joined: Sep 2016
Posts: 13,180
Likes: 10,521
Default

Under the tonneau, just below the rear window, there is a black plastic cover. I have read (but haven't verified) that there is an adjustment that can be made under that cover.

Ii think the window indexing procedure only affects the side windows, and not the back.
Reply
Old Nov 12, 2023 | 09:10 PM
  #6  
spearfish25's Avatar
spearfish25
Thread Starter
Melting Slicks
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Apr 2016
Posts: 3,169
Likes: 861
From: Naples FL
Default

Originally Posted by gnt
Unfortunately the RH cable on my top broke today so I’m unable to look at mine and give you measurements. I’m headed to the dealership on Wednesday.

Can you see an air gap between the window and seal?
When I raise the window, I noticed the upper edge stopped right as it made contact with the gasket. Once I got suspicious, I felt with a fingertip and easily noticed the window isn’t seating inside the gasket. Any lower and there’d be an air gap. A friend at the dealership confirmed mine isn’t fully raising and needs adjustment.

Originally Posted by Red Mist Rulz
Under the tonneau, just below the rear window, there is a black plastic cover. I have read (but haven't verified) that there is an adjustment that can be made under that cover.

Ii think the window indexing procedure only affects the side windows, and not the back.
Youre right that indexing didn’t fix anything. The back window doesn’t even index really. I was looking inside the tonneau earlier but didn’t see an obvious solution. I’ll check again tomorrow.
Reply
Old Nov 12, 2023 | 09:24 PM
  #7  
spearfish25's Avatar
spearfish25
Thread Starter
Melting Slicks
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Apr 2016
Posts: 3,169
Likes: 861
From: Naples FL
Default

Got it!

Theres a black box below the window that you can see with the tonneau raised. You pop off an outer cover and then you can see the motor and gearbox for the window. Another cover pops off the gearbox with 5 tabs and you can see the cable pulley with a hex screw in the center of the cable winder. 5/32 hex key allows adjustment. Simple and fixed!

Last edited by spearfish25; Nov 12, 2023 at 09:32 PM.
Reply

Get notified of new replies

To Convertible rear window adjustment





All times are GMT -4. The time now is 09:33 PM.

story-0
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-1
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-2
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-3
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-4
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-5
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-6
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-7
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-8
2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-24 16:12:42


VIEW MORE
story-9
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE