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Help!! Barely made it home

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Old Mar 8, 2021 | 03:12 PM
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Default Help!! Barely made it home

Was driving home and about the last two mikes just as i came into town my clutch pedal went all the way down and wouldn’t come back up. When i first noticed it there was about 1” of spring in it about a mile later it was completely to the floor. Just coasted into the driveway.

iv had tons of manual cars and have never experienced this so sorry if a newbie question i just dont know
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Old Mar 8, 2021 | 03:22 PM
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Check some other posts GM had a recall on the clutch master cylinder/reservoir a few years back. You can tell if you have the new one as the reservoir is all black versus a cream/white color. This would be the first thing to replace before going any further. The new unit apparentely has a more robust hydraulic system.
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Old Mar 8, 2021 | 04:30 PM
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Probably clutch master cylinder failure. Look and see if any fluid is coming out of the bell housing. If so, it might be the slave cylinder. I'd be looking at the master first though.
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Old Mar 8, 2021 | 06:24 PM
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This thread has a good explanation as to why the clutch pedal sticks to the floor due to the clutch master cylinder failure:

https://www.corvetteforum.com/forums...-cylinder.html
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Old Mar 8, 2021 | 07:32 PM
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Thank you guys for chiming in. I will read through the thread. Is it a hard job to replace the master/slave cylinder? Id rather do it myself vs a dealer charging me a small fortune and all i get back is a band aid for the problem less rubber on my rear tires.
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Old Mar 8, 2021 | 08:04 PM
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I read through that thread and then watched a vid on the trick master cylinder kit. Doesn’t seem to hard.

it also sounds like that is the reason the clutch went down and didn’t come back up.

im not a guru when it comes to trans wrenching.. would i need to bleed the clutch system? Would i need to change the slave cylinder?

im just starting to read into this so forgive my questions if they are way off.

thanks guys
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Old Mar 10, 2021 | 10:38 AM
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Still has the original master cylinder so dealer said it’s covered so it’s on its way..🤞
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Old Mar 10, 2021 | 06:50 PM
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It's not a bad one to change but kind of awkward to get to. The GM replacement part comes pre-bled so you wouldn't have needed to bleed it. The slave cylinder is way, way more work (i.e. removing rear drivetrain + torque tube) to get to it, so that would probably not be a DIY project for you

Regardless... if they are going to cover it then that's even better
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Old Mar 11, 2021 | 07:41 PM
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Just my $0.02 - but you might want to plan on getting some DOT 3 brake fluid, and a turkey baster. and maybe twice every year - remove the cap from the clutch cylinder fluid reservoir - and suck out the old fluid, and put in nice fresh fluid - then replace the cap.

It's hardly a guarantee that the hydraulics won't fail again - but you might be surprised how contaminated the fluid gets.
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Old Mar 11, 2021 | 08:21 PM
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Originally Posted by Purple92
Just my $0.02 - but you might want to plan on getting some DOT 3 brake fluid, and a turkey baster. and maybe twice every year - remove the cap from the clutch cylinder fluid reservoir - and suck out the old fluid, and put in nice fresh fluid - then replace the cap.

It's hardly a guarantee that the hydraulics won't fail again - but you might be surprised how contaminated the fluid gets.
great suggestion, it looks like sludge in there
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Old Mar 13, 2021 | 10:33 PM
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What year is your GS? I believe it was a TSB not a recall and only good for 10 years. I tried getting the revised master for mine and was denied.
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Old Mar 14, 2021 | 07:36 AM
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Originally Posted by JetstreamGS
What year is your GS? I believe it was a TSB not a recall and only good for 10 years. I tried getting the revised master for mine and was denied.
mine is a 2012. They covered it and ya it was not a recall. The service manager said they extended the warranty on that part and two others to 10 years. So my ten ten years ends in august according to my vin.
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