Having problems with your Chevrolet Venture ?

I need to reset Passlock on '99 Chev. Venture Van. I just installed new ECM. can you tell me procedure. 3.4 V6 Auto trans

Posted / edited by AnonymousUser on : 22-02-2021

Answers :

CANT REPLACE PCM AT HOME.DEALERSHIP HAS TO REPLACE REPROGRAM PCM AND THE THEFT SECURITY SYSTEM.
1. Attempt to start the car, let it stall, but DO NOT turn the key off! Leave it in RUN.
2. Wait 10 minutes or until the Theft Sys light glows steady instead of blinking.
3. Do not turn the key off, but start it immediately.
4. This should reset your Passlock system.
If this doesn't work the dealer will need to program the new PCM/ECM with a GM Tech II scanner
Repair Help & Product Troubleshooting for Chevrolet Venture

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