2013 LS3 Engine grounds?
Racer
Joined: Jun 2013
Posts: 250
Likes: 12
From: Manayunk PA
Stability and brake should be the ground next to the lowest driver side timing cover bolt. If you have a flip drive, it's the lower bolt of that bracket... normally there's another bolt on the flip bracket to move that ground but I've put it directly to the block to ensure a good ground before too. Start there.
Thread Starter
Drifting
Joined: Sep 2008
Posts: 1,297
Likes: 30
Stability and brake should be the ground next to the lowest driver side timing cover bolt. If you have a flip drive, it's the lower bolt of that bracket... normally there's another bolt on the flip bracket to move that ground but I've put it directly to the block to ensure a good ground before too. Start there.
Racer
Joined: Jun 2013
Posts: 250
Likes: 12
From: Manayunk PA
That's the EBCM ground and it can cause a lot of faults... shouldn't cause fuel though. I threw my car back together in a rush once and learned about that ground the hard way.
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Thread Starter
Drifting
Joined: Sep 2008
Posts: 1,297
Likes: 30
Drifting
Joined: Apr 2010
Posts: 1,262
Likes: 122
From: Vetteville Tennessee
I know you have HPTuners from reading one of your other threads. Can you connect with the editor and read both the ECM and TCM? If you can't read either one you have a CAN bus (serial data) issue.
The TCM is grounded at G106 which is above starter and is shared with the neg battery cable. If the ECM can't talk to the TCM it will throw "low fuel" warnings on the DIC.
When the editor reads the TCM it will disconnect it from the ECM while reading and you will see the "low fuel" warnings.
Does the car have F55? That module (ESC) is located behind the ECM and is grounded below the the engine bay fuse box. If it's having CAN bus issues or other issues you will get the stability/traction control and a msg saying you can't drive above 155 mph.
I have also seen the VCIM (which is high failure item) Voice Communication Interface Module (blue tooth and Onstar) hose up the CAN bus.
There are 6 modules on the CAN bus (5 if no F55) that can hose it up. You can jumper the input/output pins to take any one of the modules off the bus.
My experience with "reduced power" has been fuel, tune or ECM issues.
If you can read the ECM and TCM bring up the scanner and see what codes are being thrown.
The TCM is grounded at G106 which is above starter and is shared with the neg battery cable. If the ECM can't talk to the TCM it will throw "low fuel" warnings on the DIC.
When the editor reads the TCM it will disconnect it from the ECM while reading and you will see the "low fuel" warnings.
Does the car have F55? That module (ESC) is located behind the ECM and is grounded below the the engine bay fuse box. If it's having CAN bus issues or other issues you will get the stability/traction control and a msg saying you can't drive above 155 mph.
I have also seen the VCIM (which is high failure item) Voice Communication Interface Module (blue tooth and Onstar) hose up the CAN bus.
There are 6 modules on the CAN bus (5 if no F55) that can hose it up. You can jumper the input/output pins to take any one of the modules off the bus.
My experience with "reduced power" has been fuel, tune or ECM issues.
If you can read the ECM and TCM bring up the scanner and see what codes are being thrown.
Thread Starter
Drifting
Joined: Sep 2008
Posts: 1,297
Likes: 30
I know you have HPTuners from reading one of your other threads. Can you connect with the editor and read both the ECM and TCM? If you can't read either one you have a CAN bus (serial data) issue.
The TCM is grounded at G106 which is above starter and is shared with the neg battery cable. If the ECM can't talk to the TCM it will throw "low fuel" warnings on the DIC.
When the editor reads the TCM it will disconnect it from the ECM while reading and you will see the "low fuel" warnings.
Does the car have F55? That module (ESC) is located behind the ECM and is grounded below the the engine bay fuse box. If it's having CAN bus issues or other issues you will get the stability/traction control and a msg saying you can't drive above 155 mph.
I have also seen the VCIM (which is high failure item) Voice Communication Interface Module (blue tooth and Onstar) hose up the CAN bus.
There are 6 modules on the CAN bus (5 if no F55) that can hose it up. You can jumper the input/output pins to take any one of the modules off the bus.
My experience with "reduced power" has been fuel, tune or ECM issues.
If you can read the ECM and TCM bring up the scanner and see what codes are being thrown.
The TCM is grounded at G106 which is above starter and is shared with the neg battery cable. If the ECM can't talk to the TCM it will throw "low fuel" warnings on the DIC.
When the editor reads the TCM it will disconnect it from the ECM while reading and you will see the "low fuel" warnings.
Does the car have F55? That module (ESC) is located behind the ECM and is grounded below the the engine bay fuse box. If it's having CAN bus issues or other issues you will get the stability/traction control and a msg saying you can't drive above 155 mph.
I have also seen the VCIM (which is high failure item) Voice Communication Interface Module (blue tooth and Onstar) hose up the CAN bus.
There are 6 modules on the CAN bus (5 if no F55) that can hose it up. You can jumper the input/output pins to take any one of the modules off the bus.
My experience with "reduced power" has been fuel, tune or ECM issues.
If you can read the ECM and TCM bring up the scanner and see what codes are being thrown.