Question about GMC Yukon
You then have a problem there, because this vehicle has a the PASSLOCK II key based engine disabling system, and currently it is engaged. Even if you have the black keys, they too would have stopped working.
A bypass is required to circumvent. If left unchecked, it will lock down the fuel injector rail (as it has now), and you will need to tow it in to GM for evaluation, and resetting.
But, if you want to just remove this system from the equation entirelly,
I suggest the PLJX bypass kit to get around this issue.
This Passlock Bypass Module is designed to momentarilly allow the engine to remote start by sending a proper coded pulse to open the fuel rail passlock injector cut off circuit.
The output from an alarm/remote starter would then shut down the pulse, once it has detected the engine has engaged, and preserve the integrity of the passlock system. That is it's designed purpose.
However, in your case, this input wire on the PLJX module, instead of going to a momentary ground pulse from an alarm/remote starter, would go to a constant chassis ground, through the bypass module, grounding out the PASSLOCK. The PASSLOCK would then always be bypassed as long as that wire is chassis grounded.
Check this LINK like reference guide for other additional details.
Posted on Jun 03, 2010
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Posted on Jan 02, 2017
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