CorvetteForum - Chevrolet Corvette Forum Discussion - C5 Tech

Sensor gremlin

Marshall0429 — Wed, 03 Jun 2026 16:45:18 GMT

I�ve had the usual service abs/traction control codes since I bought my �02 15 months ago. Also had hvac no comm codes and left actuator codes too. All grounds were good and voltage to actuator was normal. Took my car to Brian at Elevate Automotive in Waco Texas who has extensive vette experience and he suggested changing the steering wheel location sensor even though the code was a history code. It�s been over a month and (knock on wood) there have been no codes or problems with anything.

Squeaky driver window

Vox Machina — Wed, 03 Jun 2026 15:01:51 GMT

My driver wibdow has started squeaking now that ive stiffened up the suspension. Is this a sign the window needs adjusting or should I just get some silicone lube and call it good?

Transmission Help. Not shifting into second all the way

portsheldon — Wed, 03 Jun 2026 14:12:15 GMT

I have a 2003 Vette, manual transmission. Having problems lately falling out of second or more likely not fully getting it shifted into second gear. Could the shift rod be bent? Is there any adjustment. I know the shifter is tight on the transmission side cause a shop recently replaced the transmission. They put a new roll pin in the linkage; it shifted poorly into second before the new transmission. The new transmission isn't faulty imo. What could need adjusted? Is it a transmission issue? Clutch isn't new but it doesn't seem to slip. No grinding of gears when shifting into any gears and it doesn't grind when the shifter pops out of place either.

Just need some advice!

Oboy another harmonic balancer thread!

jhfarr — Tue, 02 Jun 2026 20:46:56 GMT

Hi everyone! I just bought a nice '04 base coupe with 35k miles and thought I'd let everyone have a look at my harmonic balancer. I think I'm all right here for now. What say y'all?

[edit] On the other hand, I slowed it down and do see a tiny wobble. Have a look!

Here's the YouTube link:

Attached Files

Untitled.mov (16.92 MB)

Reliable fuel filter/regulator options

Diydoidothisc5 — Tue, 02 Jun 2026 18:33:22 GMT

Ive been looking to replace my fuel filter/regulator because its definitely original. Only problem is all of the filters I found are crap. Even the acdelco is made by wix and the wix filter apparently used to be good but it isn't anymore most people are having fuel regulator pressure problems ranging from immediately to a few hours after installing. So my question is who has had good luck and with what brand?

Help...rodent odor from vents

barcalude — Tue, 02 Jun 2026 15:45:16 GMT

Looks like winter storage wasn't nice for me, but good for mice. When I run the ventilation system, I get the stench of mouse house from the vents. I've tried the odor bomb route, it helped but odor is still there. Where and how do I look in the vent/blower to find and remove whatever they left behind. thanks

thread pitch of power steering rack

eyekyu — Mon, 01 Jun 2026 23:22:58 GMT

looking for the thread pitch for the for the lines that go into the steering rack. i ended up cross threading the return/cooler line like an idiot and i think there is a bur inside now, great! from what i read its an M16 x 1.5? anyone have the part number for the return line that goes from the reservoir to steering rack? I would rather buy new OEM if at all available, i did find a few on ebay.

thanks for the help everyone, this is what i get for rushing.

Dash mounted Car Play unit

Jim53066 — Mon, 01 Jun 2026 20:32:44 GMT

I will be cross posting this into the audio forum also, I just did not know how many C5 people read that forum on a regular basis.

Hi,
I am wondering if anyone has purchased one of the dash mounted car play devices offered today, and what were your experiences? I have an 2001, and the radio has already been upgraded with a single din Panasonic unit that for the most part works just fine. I would however like to have the mirror image function so I can use my phone for Waze or Google maps and have it show up on the screen so I do not have to look at the small screened phone. The added forward mounted camera would be a big plus at the same time.
Thanks, JIM

Similar to this image.

C5 1998 Base Model ABS Unit Install Process

rwlw67 — Mon, 01 Jun 2026 06:43:54 GMT

Support
Has anyone got a Wiring Diagram for the ABS harness to suit a "M" Model ABS Unit located in the Front of my 1998 Base Corvette with no Active Handling

My Unit is Fried and Purchased another "M" Model Unit and Harness from USA

I have recently received a Unit and Harness but seem to missing the Wire that connects to the rear of the Module, my Harness had the below in it, but the Harness I received did not from the donor so just wanted to know if anyone can shed some light on where this gets connected to?

Thanks in advance

Broke evap line, replaced with hose. Now P0440 code

Vox Machina — Mon, 01 Jun 2026 02:39:44 GMT

Like the title states, broke the corrugated plastic line for the evap from the firewall to the purge solenoid. I replaced it with some 3/8 rubber fuel line as well as a couple worm clamps. Got a p0440 code now. I checked the clamps and theyre plenty tight, I dont see anywhere it would leak, but obviously I cant smoke check it now because the service port is gone.

Any ideas?

C5 corvette fuel pump wine after a long drive

Diydoidothisc5 — Mon, 01 Jun 2026 01:40:36 GMT

Just took my c5 on a longer trip 4 hours both ways. I do have an exhaust so I didnt notice it until I stopped. When I was stopped I started to hear a whining/buzzing noise seemingly comming from the fuel pump it was on the driver side behind the door more audible from the wheel well area. What i thought was odd also is that the sound changed depending on what i presses in the interior for example the window switch would change the pitch of the whine/buzzing sound.

Anyway so I turned the car off and waited a few hours and turned it back on heard nothing from the pump.
On the drive back same thing heard nothing, i had to get back so I didn't have time to stop and check mid way but im sure it started whining at some point during the drive

Basically short drives i hear nothing but longer drives i hear it, seemingly cooling down helped it.
that being said I was reading a dead end post by someone else who replaced fuel pumps and filters multiple times to try and fix the issue with no success.

Hopefully someoe knows more than I do and can steer me in the right direction and so if their is a fix we can document it here. Or crossing my fingers its nothing then we can all relax and just drive our cars haha

Just for info my c5 is a 2002 6 speed

Edited because autocorrect is so great

ac acting up ,suspect blend door. 97 base

cdw — Sun, 31 May 2026 23:15:44 GMT

installed a 4 seasons kit just under a couple years ago and took it to my ac guy to finish the charging. had the passenger cool and drivers warm problem so i remember something about rebooting by removing a couple fuses from floor board box. waited about half hour reinstalled fuses and bingo it worked great. been working good till memorial when we went to the caves here in central ohio. was good till the ride home and it started to blow warm. got a few projects going in the house so it took me a few days to check it out. put my manifold gauges on and my temp gauge in the center vent and everything looked good so i took a ride to see if it would do the warm trick again. was out for about 45 min with the gauge in the center vent and then the drivers vent showing 40 degrees in both. stayed out a little more till i started to freeze my *** off so went home. i suspect the blend door hung up for some reason. did not reboot it this time but it sat for a few days. anybody have a suggestion or had this happen to them?

C5 High Speed Fan Operation

Croutchie — Sun, 31 May 2026 20:09:50 GMT

N/a

C5 High Speed Fan Operation

Croutchie — Sun, 31 May 2026 20:04:12 GMT

Hi all,

I�ve been trying to sort out why my fans won�t kick into high speed and have hit a brick wall.

I have a Dewitt�s rad and their spal fan setup. I can open up vcm scanner and trigger low speed fan 1. When I go to trigger fan 2 fans do not change speed and I hear no relay kicking.

tested the relay sockets and they all have 12v, the fans will go into low speed when they reach the set coolant temp, but will not engage in high speed mode.

I have a sac city coolit v2 on relay 44 and can manually trigger high speed to the passenger side fan so obviously the wiring from the fuse box to the fans is good.

everything has been pointing to the high speed fan ground signal from pin 33 being broken somewhere between the pcm and the fusebox. I ran a brand new ground trigger from the pcm to the fuse box connector and still won�t kick the fans into high speed.

hopefully someone has some insight on what I can check next. The cars not really getting hot except for when I�m in slow moving bumper to bumper traffic, but as we continue to get into warmer weather I can see it becoming a problem on 90+ degree days.

Cd player not working

mhemminger2024@gmail — Sun, 31 May 2026 18:03:12 GMT

Just bought a 2002 vette with the 12 cd changer. Can't get it to play. Course I don't know how. So I've got it loaded "upside down" in trunk. You can hear it loading but inside with key on I get power to radio but ERR signal when I insert another cd in dash. I can't get the cd light to go up to the section that selects the # of cd u want to play. If that makes any sense. Seems like the trouble is in the cd switch which is right beside the am/fm switch. Any ideas ? Any help is greatly appreciated!!!