gm data codes are they still available anywhere

got customer who has had new SRS dcu fitted he brought to us to have it coded in with T4.unable to proceed past where car is regonised as 45 diesel man transmission, the says invalid GM data and asks to enter. this used to be available from omitec after submitting form with relavant specs.

my question is does any hold these codes now and if so who to contact.

geoff taylor primrose link motors clitheroe lancs tel no 01200423883

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