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Passlock 'challenge response'
Posted to Technical Theory Forum on 11/14/2021 4 Replies

In diagnosing an intermittent no start and intermittent "won't shut off", I stumbled on some interesting verbiage in the p0513- "Theft deterrent key incorrect" chart. Under "conditions for setting the DTC" reads, "the calculated response by the TDM does not eq... Login to read more.

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car Vehicle Data

2008 GMC Savana 3500 4.8L

Engine4.8 L
Trans4-speed Automatic (Electronic)

car Vehicle Data

2008 GMC Savana 3500 4.8L

Engine4.8 L
Trans4-speed Automatic (Electronic)