What year is your Vette? 99-00? I dont think any reflash to the EBCM is necessary. It's plug and play. Double check the part numbers. If it fixed the old codes but set new codes, you may have the wrong part.

Re-read your post ---99 C5

 

When i put my new EBCM in, i got a 1282, it messes with my active handling and will lock up the the right front wheel when i give it 100% throttle randomly.

 

I found this---
Document ID# 1750541
1999 Chevrolet Corvette

Subject: Unwanted Active Handling Activation DTC C1282 - keywords ABS active brake EBTCM Stabilitrak #PIC3844 - (01/12/2006)

Models: 1998-2004 Chevrolet Corvette


The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:

Some vehicles may have a concern with intermittent unwanted activation of the Active Handling System. The Yaw Rate sensor signal can usually be verified to be changing at the time this occurs. DTC C1282 will likely be present in the ABS module.
Recommendation/Instructions:

Check the Yaw Rate Sensor for a missing or loose "Pencil type" bracket. This bracket is supplemental to the main bracket of the Instrument Panel Carrier and is intended to provide extra support. Without this bracket, the sensor will "bounce" under certain road conditions causing the concern. If the bracket is missing part number 10409133 will need to be ordered and installed to correct the concern.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.


GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.
WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION

© Copyright General Motors Corporation. All Rights Reserved.

This might help?

 

Holy Cow! Where did you get that!? i have all the bulletins and TSB's and Service Manuals! and i've looked through those! Anyone see that bracket they're referring to?

 

The Yaw rate sensor is under the radio.

Vehicle Yaw Sensor Replacement
Removal Procedure

1. Turn the ignition switch to the OFF position.
2. Remove the IP Accessory Trim Plate refer to Instrument Panel Accessory Trim Plate Replacement in Instrument Panel, Gauges and Console.
3. Disconnect the Yaw Rate Sensor connector.
4. Loosen the two Yaw Rate Sensor nuts (1).
5. Remove the Yaw Rate Sensor (2).

Installation Procedure

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
1. Install the Yaw Rate Sensor (2) onto the Yaw Rate Sensor Bracket.

Tighten
Tighten the two Yaw Rate Sensor nuts (1) to 6 N·m (5 lb ft).
2. Connect the Yaw Rate Sensor connector.
3. Install the IP Accessory Trim Plate refer to Instrument Panel Accessory Trim Plate Replacement in Instrument Panel, Gauges and Console.
4. Turn the ignition switch to the ON position, engine off.
5. Perform the Diagnostic System Check - ABS .

Document ID# 677922
2001 Chevrolet Corvette

 

So its not what i took a picture of? ITs that box on the torque tube tunnel under the radio?!

 

Correct, the picture you have is the Steering position sensor. Thats a whole issue in its own. Yes, it's under the radio (under the climate control to be exact.

 

ok, well i've got an ipod controller coming this week, i'll check it out when i'm in there. i have been in there probably 15-20 times in the last 6 months from changin shifters, and running wires and everything, hopefully something is just loose or came unplugged.

Locking a wheel up and the steering wheel jerk out of your hand at 120mph is no bueno. (i was autocrossing, not on the street)

 

Good luck with your search, PM me with your results!!

 

Let me know how it turns out, personally I don't think anything needs to be "flashed"

BTW - the term "flash" has to do with programming a computer and since there is no computer in the EBCM I don't know what they mean when they told you it needs to be flashed.

 

The unit is a hardware module that may contain PLAs or other programmable logic but the program probably is loaded from a PROM (which is inside the module) at power up.
Bill

 

thanks for everybody's help. mine's a 99. i'll let you know what happens after i take it in.

 

ok... you guys are right. i was given the wrong part. i put the right one in (part# 09367071) and all those weird codes went away. now my abs, service engine, and active handling lights go on. i get 1255H (ecu malfunction) & 1276H (delivered torque circuit) codes. after i clear them they come back and so do the lights. a couple times i got a 1276HC code. is this one of those things that will go away after so-many engine cycles? thanks!

 

Normally when you replace any smart module ie; PCM, EBTCM, ABS module, or the SDM/SIR module, you have to flash the correct program into the module based on the VIN. Then a VTD relearn has to be done so that the module(s) learns all the other devices on the class 2 serial bus. This is all normally done with a GM TECH2.

 

I'll look these codes up in the service manual tonight when I get home.

 

Are these codes C1255 and C1276 or are they P1255 and P1276.

If the first code is C1255 and you are unable to reset it then you need another EBCM because the service manual simply says that an internal malfunction exists within the EBCM for this code.

P1276 is a fault with the the pedal position transmitter (gas pedal)

C1276 has to do with the EBCM detecting a torque signal coming from the PCM (I believe) and that signal is either out of range or nonexistant.

 

This is the correct advice for your problem, you will have to go to a dealer unless you have a Tech 2 and the GM TIS software.

 

once agian there is nothing to "flash" in the EBCM, this is extremely bad advice!!! and the service manual will back me up on this.

 

well... the 1276 is a "C" code - C1276H (delivered torque circuit). i really don't think i need a new ebtcm (this one's new). have any of you changed your ebtcm and had to have it flashed? i was trying to stay away from the dealer but if i have to take it in, i will. thanks!

 

what about the other code, is it a C1255 because if it is than that is an internal EBCM fault.

Where did you get the EBCM from?