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The answer below is correct BUT< <<>>> Stop at step #4 and try and start it up.It always works on my 03 Grand Am GT. As for bypassing the Passlock, you need a module that's sold in the USA to do that, costs about $100...Happy trails from Crazyted


Not to add to the questions, but I have had the same problem with my 2003 Pontiac Grand Am GT. This is what I've learned over the last 26 hours. The PassLock security feature in these cars becomes unstable over time. Some of the contributing issues include worn keys (yes your car key being worn out can cause this issue), the wires to your BCM (Body Control Module) located behind the black plastic "kick plate" under your glovebox may be disconnected, frayed, damaged, or corroded (these little black boxes are about $400). Before you head out and start spending cash like you've got it... try these simple steps to make certain that it isn't' a "learning issue" with your car's computer system.

1) Try to start the car and let the key rest in the "ON" position. If the "SECURITY" light is on or blinking, leave it be and continue to next step.

2) Leave the key in the "ON" position for 15 minutes (they recommend 10, but why take a chance of missing it by a few seconds and having to restart the entire process again).

3) Turn the key to the "OFF" position, but leave it in the ignition and wait 5 seconds.

4) Turn the key back to the "ON" position, but don't try to start. Let set for another 15 minutes.

5) Turn the key back to the "OFF" position and wait another 5 seconds.

6) Turn the key back to the "ON" position and wait 15 more minutes. DO NOT TRY TO START YET>

7) Turn the key back to the "OFF" position for yet another 5 seconds.

8) NOW turn the key "ON" and try to start. If the BCM has learned the new value for the resistor in your key, it will fire up without any further issues.

NOW.... If this does NOT work... you've got the same issues that I have. I've received numerous suggestions on what to do from this point. Here is a list of the possible culprits, starting with the easiest and least expensive.

1) Fuses (check them all, both sides of the dash panels and under the hood)

2) You can actually bypass the BCM by pulling out the middle wiring harness and isolating the black and yellow wires. Expose a small portion of each by cutting away the wire insulation and soldering a 2.2k resistor (should be easily found at Radio Shack for under 2 bucks). Solder the ends to each wire and wrap with electrical tape. You've just bypassed the $400 PassLock system and fooled your car into accepting the new value. You'll have to do the same procedure as above for the computer to learn the new value, but it does work on 97% of the vehicles they've tried this on.

3) Replace the BCM, mine is made by Delphi and they are VIN specific, so you'll need to take your vehicle's id number with you to the dealership. They cost about $400 and are easy to replace (3 wiring harnesses snap onto the top and are color coded). This fixes almost all of the issues and doesn't leave that annoying "SECURITY" light on.

Hope this helps and if you have ANY questions, please feel free to contact me at with "PONTIAC" in the subject line.

ok you have to check the ohms on the key for reistance ( so 2.2 wont always work and you may need to put a relay in so the resistance goes on and off like you were removeing the key since some computers will think you left the key in the ignition and will keep it from starting or running)

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โˆ™ 2011-09-13 04:42:26
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Q: How can you bypass the security system on 2003 grand prix because it wont start and the security light is on?
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