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code p1626 and p1631

11-21-2004, 11:02 PM
please help sovle code p1626 & p1631 tahoe would not. what cause problem and how to correct.

11-22-2004, 06:13 AM
You Didn't State What Year, Though For Year 1999-2001.

P-1626 Serial Data Communication Failure With Vehicle Theft Deterent Controller (no Password)

P-1631 Theft Deterent Password Incorrect

Sounds Like A Problem With The Anti Theft System...

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