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Everything Electrical & Electronic Have an electrical problem? Lighting, Alternators, gauges, DIC, HUD, etc? Post it here. Please post Audio problems in the Audio forum, and Engine control problems in the appropriate Mechanical forum for your year.

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Old 07-10-2004, 12:10 AM   #1
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Default Keyless Entry / All things RAC (BCM)

I haven't seen many solutions to my problem so I'm posting what I found on my 93 SSE. Symptoms: The keyless entry quit on both transmitters, radio shuts off when key is off, no extended dome lights, key only unlocks the door you are unlocking instead of everything.
Diag: Test both xmitters, if the other works ok - bad batteries or xmitter. If both fail, check RAC connections for corrosion. If ok, replace RAC.
Soln: R&R RAC, connect scan tool to program keyless transmitters to new RAC.

Of course it'* never as easy as the manual says. Have you been under the dash on the pass side? I ran into issues when trying to order the new part. Eventually, I opted to order the correct one - luckily. 25646511 is the part I ordered.

By the way here'* another gotcha. Only the shop manual refers to the RAC as a RAC. You talk to a dealer and you better say BCM or Body Control (ler) (Module)

If you haven't seen the sticky note on keyless - read it and add to it.
Both the new module and old module have the same FCC ID'* as well as both transmitters. Here'* that info
25615095 Orig RAC ABO0303R 218K1127
25646511 New RAC ABO0303R 218K1127
25602667... XMIT 1 ABO0303T 218K1033
25602667... XMIT 2 ABO0303T 218K1033
(R for receive T for transmit)
GM also listed a 25646510 for my year but according to the last 8 of the VIN, I needed the other one. I found this out after I opted not to order it since it was a lower number. (whew). I was also afraid I was going to need new fob'* with the new part, but the FCC ID matches so I think I'm safe.

***Update 7/10 Went to another dealer to get a 2nd opinion on my programming issue. I tried per the tech instructions last night but it didn't work. I talked to a tech and he said the key had to be on (not sure if this is correct or not) during programming. I get programming mode confirmation lock and unlock, but nothing happens when I push a transmitter button. He also said to try disconnecting the battery completely and touch the pos and neg cables together to rid the electrical system of any residual charge. I tried that also, and it still doesn't work. Anyone know what might be causing this? It'll probably be something simple that I'm not doing, but the tech said I was doing everything right and it should have worked.
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