Question on replacing BCM in 2000 Corvette
Thread Starter
Racer
Joined: Aug 2004
Posts: 448
Likes: 29
From: Regina SK
Question on replacing BCM in 2000 Corvette
I'm looking to buy a spare used BCM for my Corvette. Here are my questions:
1. Are all 2000 BCM's the same? (i.e. do they differ between auto/standard cars, cars with different features?)
2. It is my understanding that if I put in a different BCM, it will have to be programmed by the dealer for my car. Is this correct?
3. When the dealer programs the BCM, will they affect anything in my engine computer (its running a custom tune and I don't want to loose it)?
Thanks!
1. Are all 2000 BCM's the same? (i.e. do they differ between auto/standard cars, cars with different features?)
2. It is my understanding that if I put in a different BCM, it will have to be programmed by the dealer for my car. Is this correct?
3. When the dealer programs the BCM, will they affect anything in my engine computer (its running a custom tune and I don't want to loose it)?
Thanks!
Tech Contributor
Joined: Oct 1999
Posts: 41,058
Likes: 9,820
From: Charlotte, NC (formerly Endicott, NY)
I'm looking to buy a spare used BCM for my Corvette. Here are my questions:
1. Are all 2000 BCM's the same? (i.e. do they differ between auto/standard cars, cars with different features?)
Don't know the answer to that one.
2. It is my understanding that if I put in a different BCM, it will have to be programmed by the dealer for my car. Is this correct?
Yes. It has to be programmed to work with the other computers in the car.
3. When the dealer programs the BCM, will they affect anything in my engine computer (its running a custom tune and I don't want to loose it)?
The PCM has to be reprogrammed to accept the new password from the BCM. Not sure if that means everything will be reprogrammed but from the description below it looks like it isn't totally programmed.
Thanks!
1. Are all 2000 BCM's the same? (i.e. do they differ between auto/standard cars, cars with different features?)
Don't know the answer to that one.
2. It is my understanding that if I put in a different BCM, it will have to be programmed by the dealer for my car. Is this correct?
Yes. It has to be programmed to work with the other computers in the car.
3. When the dealer programs the BCM, will they affect anything in my engine computer (its running a custom tune and I don't want to loose it)?
The PCM has to be reprogrammed to accept the new password from the BCM. Not sure if that means everything will be reprogrammed but from the description below it looks like it isn't totally programmed.
Thanks!
The service BCMs EEPROM chip must be programmed with the proper RPO configurations by using a scan tool. The EEPROM stores information regarding the vehicle options and point of sale. If the BCM is not properly configured with the correct RPO codes, the BCM will set default values for some systems, which could cause malfunctions in other systems. When the BCM is replaced, the BCM must be programed to identify the following information:
- Country of Sale (US, Canada, Europe, Japan, etc.)
- Real Time Damping (RTD)
- Memory Options
- Front Fog Lamps
- HVAC (C60-Manual, CJ2-Automatic)
- Active Handling
- Auto Headlamp Control
- Power Tilt/Telescope Column
When an ignition key or the BCM is replaced, the BCM must be programmed to accept the resistance value of the new or existing vehicle keys in order to allow PASS-Key® operation. Refer to Programming Theft Deterrent System Components in Theft Deterrents.
Important
After programming, perform the following to avoid future misdiagnosis:
- Turn the ignition OFF for 10 seconds.
- Connect the scan tool to the data link connector.
- Turn the ignition ON with the engine OFF.
- Use the scan tool in order to retrieve history DTCs from all modules.
- Clear all history DTCs.
Burning Brakes
Joined: May 2005
Posts: 1,163
Likes: 2
From: Palm Beach Gardens Fla
Cruise-In IX Veteran
I have just been through this, the short answer is no, they are not all the same. While trying to buy used, there was a lot of researching involved in trying to find a match, with no luck. I finally bought a new one, and gave up on finding a used one. They are quite expensive, however Gene Culley had a pretty good price.
PM me and I can give you the numbers of those that were most helpful.
PM me and I can give you the numbers of those that were most helpful.
