Connection
Confirm 12–14 V at the cluster, pin 5 ground, pin 9 ALDL, the correct COM/J2534 interface, and the correct Bench or In vehicle mode.
Support centre
Useful answers first.
A private support request when needed.
Use the checklist below before submitting a request. It resolves the common connection and write issues without exposing internal protocol details.
Identification
Read Cluster ID before configuration. Include the GM part number, connection type and exact customer Activity message in a request.
Programming
Keep power stable, wait for verified read-back, and do not disconnect while a write is active. V13.7 creates one baseline before the first write.
Account
Use My account to review paid-through time, registered PCs, release a computer once per 24 hours, or change your password.
Your requests
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