I have rebuilt enough of these cars to run into this problem more than a few times. When these cars were new, a new ignition lock was how I fixed it. As they got older, customers decided to save a few bucks on the repair and go with the method I will show you today. If you are having trouble with your GM Passlock 2 system, this repair will solve your problems but the color wires you are looking for may be a little different, if you don't have a 99- 05 Grand am, 99-04 Alero, 97-04 Malibu or 97-04 Cutlass. They also used this system on the Impala, Monte Carlo, Silverado, Sierra, Tahoe, Suburban, Yukon, Express vans, just to name a few.


The resistance of the resistor you use must be between 1000 - 13000 ohms
If you are trying to match the original lock resistance, there is a 5% tolerance.



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