EBCM removal
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
There's SIX torx bit screws that secure the EBTCM to the Brake Pressure Modulator Valve (BPMV) module. Remove the main connector, remove the pump motor connector under the module and the six fasteners. The module has a thin rubber gasket and that gasket may STICK the two together.
There is ZERO liquid or fluid inside the module. It should be DRY inside!
NOTE and a WARNING!!!!!!!!!!!!!!!!!!!!!!!!!!!
The BPMV has METAL SPOOLS that protrude out of the module and into COILS that are attached to the circuit board inside the EBTCM. If you pry the EBTCM side ways or UP/DOWN, you will break the coils off the module.
The module should easily separate or pop straight off for removal.
If the fasteners that you remove don't screw into the BPMV, you are not removing the correct fasteners!!!
WHAT errors, issues or DTCs are you having that makes you THINK that the module is bad. Please read and post the DTCs using the DIC during an active IGNITION CYCLE. (before you turn off the engine!)
BC
There is ZERO liquid or fluid inside the module. It should be DRY inside!
NOTE and a WARNING!!!!!!!!!!!!!!!!!!!!!!!!!!!
The BPMV has METAL SPOOLS that protrude out of the module and into COILS that are attached to the circuit board inside the EBTCM. If you pry the EBTCM side ways or UP/DOWN, you will break the coils off the module.
The module should easily separate or pop straight off for removal.
If the fasteners that you remove don't screw into the BPMV, you are not removing the correct fasteners!!!
WHAT errors, issues or DTCs are you having that makes you THINK that the module is bad. Please read and post the DTCs using the DIC during an active IGNITION CYCLE. (before you turn off the engine!)
BC
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Ignition key & ignition switch
The KEY portion of the ignition switch and the SWITCH portion are entirely TWO DIFFERENT parts. 
I can change out the key portion (KEY CYLINDER/VATS SENSOR) and insert the new one into your same old SWITCH part of the module.
SO,, please don't ASSUME that the ignition switch part is NEW unless you have some documentation from the stealership that states that they installed a new IGNITION SWITCH and a NEW Key Lock CYLINDER
BC
I can change out the key portion (KEY CYLINDER/VATS SENSOR) and insert the new one into your same old SWITCH part of the module.
SO,, please don't ASSUME that the ignition switch part is NEW unless you have some documentation from the stealership that states that they installed a new IGNITION SWITCH and a NEW Key Lock CYLINDER
BC
Last edited by Bill Curlee; Nov 4, 2016 at 01:51 PM.
Acct Suspended APR 2026 by request
Joined: Dec 2010
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2020 Corvette of the Year Finalist (performance mods)
C5 of Year Winner (performance mods) 2019
I had the same code pop up a couple of years ago and in my case it was a few broken solder joints on the relay inside the ebcm... all I had to do was open the ebcm up and resolder the relay and it has worked fine since then... if I were you I would open it up and look at the relay joints and try resoldering them, worst case scenario you might have to end up replacing the $5 relay inside the ebcm but all in all it's an easy job that you can do yourself and save a chunk of money and time... here is a link that explains the process in depth but it appears a lot of the pics are now missing, https://www.corvetteforum.com/forums...r-fleabay.html
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Racer
Joined: Jan 2013
Posts: 470
Likes: 58
it's not bad, just be gentle
My car just had this problem--at 25k miles. After some basic checks and cleaning all 6 grounds, I had the Chevy dealer do their diagnostic tool for $99, which confirmed the EBCM was bad. It's easier to get at some of the recessed screws from the bottom, especially if you're old like me and your hands don't work as well as they used to. Just pay attention to how the bail clip fits, so you can just snap it back on, no fuss. I had to use different tools for different bolts, due to the recess and tight access to some. But, I have huge oil lines that were in the way from the bottom, it's not bad really.
Acct Suspended APR 2026 by request
Joined: Dec 2010
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2020 Corvette of the Year Finalist (performance mods)
C5 of Year Winner (performance mods) 2019
As for the EBCM, soldering is no biggie for me so I would consider doing that. But depending on the level of PITA to get the thing out/put back in, if a new battery (after ensuring the old one is truly bad) does not resolve and the other troubleshooting steps don't help, I'll probably just send the thing in to ABSFixer. Here's hoping I won't need to do that.
Instructor
Joined: Oct 2010
Posts: 247
Likes: 44
From: Vancouver Island British Columbia, Canada
Instructor
Joined: Oct 2010
Posts: 247
Likes: 44
From: Vancouver Island British Columbia, Canada
It does seem a little odd and an excessively long time although I can't comment for sure on the 'Vette as I don't have one right now. Currently I'm driving an '05 CTS V but I don't think my R.A.P. stays active for more than about 5 minutes.