I don't think your 98 is a C6
Oh and yer welcome for all the research I did for you 
climate control display
Team Owner
Joined: Sep 2005
Posts: 20,352
Likes: 568
From: Ventura County, Calif
You didn't say what year your car is but the HVAC head unit failure is somewhat common. You'll need to replace it, they can't be rebuilt, AFAIK. Most dealers will charge you $450-$500+ for the part. Our vendors, partstaxi.com and gmpartshouse.com will charge you about $350 ish. Changing it is the same as replacing the radio, remove the center console and it's right there, 4 screws and a plug. If you need DIY instructions for the console you can search or ask for a link........or pay someone to change it. Good luck. 
Le Mans Master
Joined: Dec 2004
Posts: 5,759
Likes: 539
From: AZ
St. Jude Donor '06-'08-'10-'11-'12-'13 '14-'15-'16-'17-'18-'19
I have one for sale in the C6 parts for sale area. http://forums.corvetteforum.com/c6-p...-05-08-c6.html
I'll drop the price to $300 and pay shipping to the lower 48.
I'll drop the price to $300 and pay shipping to the lower 48.
Le Mans Master
Joined: Oct 2000
Posts: 6,516
Likes: 730
From: Sausalito CA
I vote with replacement...either used or new.
I also agree this is a common failure and of course all the fuses have been checked, yes?
I recall that w/ C5s the display stopped functioning from a copper band that came in contact with the *****. One would re-adjust the band to regain function. A C5 forum search might turn up some detail.
Now if your saying the display is not lit...then seems (seems) to me soldering and parts might be needed. I have no info on unit disassembly and parts needed in that case.
I also agree this is a common failure and of course all the fuses have been checked, yes?
I recall that w/ C5s the display stopped functioning from a copper band that came in contact with the *****. One would re-adjust the band to regain function. A C5 forum search might turn up some detail.
Now if your saying the display is not lit...then seems (seems) to me soldering and parts might be needed. I have no info on unit disassembly and parts needed in that case.
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