Where is the BCM on a 99 Tahoe??
08-02-2013, 02:09 PM
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Where is the BCM on a 99 Tahoe??
I need help y'all I can't find the BCM on my Tahoe. I recently installed a 2001 5.3 in my 99 Tahoe and the PCM has a wire thats suppose to hook up to the BCM but I can't find the damn thing!!
08-02-2013, 02:12 PM
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I also have no luck finding out where the old PCM attached to the BCM I have no schematic's showing this from either year. All it shows is where the wire pinout is on the 2001 PCM and what pinout it is on the BCM.
08-02-2013, 03:13 PM
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I pulled the knee panel off and the only thing I see where the BCM should be is a little silver metal box with 1 plug in it. It's about 4x2x1. On the other side right under the headlight switch there's an after market alarm system. I checked in/under the center console too and it's not there either. I also checked behind the glove box and it's not there either. Could it be in the back behind a panel or something? I know it's in the back on my Vette and I had a suburban that it was in with the spare tire but that was an 89 model GMC.
08-02-2013, 05:48 PM
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It had a 5.7 Vortec with the spider injection in it and a 4L60-E trans. I pulled the motor and bought the spacer and flywheel for the 5.3 swap. I bought the complete motor with wiring harness and PCM up in NY for $450. I installed the motor and hooked everything up but it just starts and then dies. The injectors stop pulsing. Without a BCM to tell it to pulse I guess I'm just going to have to flash the PCM and remove VATS from it.
