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L67 swap no crank

Old 08-07-2018, 10:10 AM
Thread Starter
Join Date: Aug 2017
Posts: 6
Angry L67 swap no crank

I did the l67 swap. Got the motor/tans and pcm out of a donor car. Donor car was a 04 impala ss. My car is a 03 monte ss. I got it ready to fire uo and turn the key and nothing. The dash goes off and nothing happens no click. I tried another pcm out of another sc car and same thing. Car ran fine before swap. I traded my factory pcm to junkyard for core. A buddy thinks the pcm has to b programmmed to the vin number. I have bypassed the ims in the trans. Have done the cats relearn multiple times with no luck. Motor does crank if i put power to the ppl wire on starter. What am i missing. Do i need to go get the bcm out od the donor car or have a custom pcm burned with ny vin??
Old 08-07-2018, 10:37 AM
ChibiBlackSheep's Avatar

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You need to your PCM tuned to your VIN, your buddy is correct. The BCM and the PCM need to talk together, and that's not happening. I wouldn't swap your BCM, there are electronics and features that might have differed, and you could lock your radio too.

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