2001 Chevy 2500 passlock booboo

I agree with J Rilla. Sounds like a ignition switch problem. Check the two main harnesses at the ign. switch. See if the two heavy gauge red wires still show 12v. Then, have you powered your RS using the 12v wires at the ign. or direct from the battery or other source. If you have used another source, check the ign fuse(s). It's worth a try.

ok, lets see, I do have the brake wire disconnected from the RS or it does die, and I do drive around like this 24 minutes at a time (sucks) As for voltage, I checked onthe yellow and ORANGE / black wire. With ignition off I get 5.03VDC with the ignition in the on position I get 5.03VDC with the truck running on RS I get 1.30VDC, and this is all happening without the passlock bypass 555L connected. I disconnected this totally and I don't get a security light, I only get a security light when the bypass is connected. Also when I try to start the truck with the key I do here a relay clicking under the dash, but I don't know where it is coming from Lights or ignition. but something happens when I try to start with the key just not starting. I will check all my connections again and make double, triple sure I haven't pulled a wire loose or something. Do the voltages seem ok? Would this mean the BCM is ok?

A little more info, I tested some more voltage, Turn the key to the on position and checked voltage: Red lead to yellow passlock wire and black lead to ground. = 1.31 VDC. I tried to start and then checked the voltage again after trying to start and it was 1.31 VDC I then held the key in the start position for 10 seconds and released and checked the voltage, 1.31 VDC. Here is a little more info. As I have said before, the RS will start the truck if the key is on, but I just found out today that without the passlock bypass unit (555L) connected I have to actually try to start the truck and it will start with RS but if I don't try to start and only put in the on or run position it will crank and die. But with the 555L connected I don't not have to actually try to start the truck I just have to turn the key to the on or run position. I didn't get to do anything with it today,  but I am starting to think I might have a broken acc. wire or something to that effect, and not getting the power to start or something, but then again I have been thinking a lot of things about this truck lately.

Where are your power wires coming from for the remote start? Have you checked the larger fuses under the hood?Certified Security Specialist

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I have them connected straight to the battery. I did check the fuses under the hood and didn't find any of them blown, but I plan to check again.

How about turning the key to run and testing for power on your main power wire, ign wires, and accessory wires at the ignition harness.Certified Security Specialist

Always check info with a digital multimeter.

I promise to be good.

Tell Darwin I sent you.

I've been sick lately, sorry I won't be on much.

It sounds like the Passlock system isn't to blame for the truck not starting. Just to confirm though did you test the voltage on the yellow wire with the 555l disconnected (Y/N) after trying to start with just the key. I just want to know if the 555l is hooked up correctly or not. It is possible to accidently wire it up as always on. If you did check it this way try what auex suggested. There are two main battery leads to the ignition switch: red and RED / white; Ignition is pink amd white - Have 12 volts (+) during crank and run. The wire for your heater is orange- accessory. Crank or starter is yellow - larger than the passlock yellow wire. One other thing to check is if you pull the shroud off the column you can check to see that the ignition switch harness hasn't been partially pulled out. I've seen it happen before.sparky

Well people I hate to do this, but I think we can put this topic to rest. So saying that I would like to express my deepest thanks to all who have helped me and taught me a lot about the GM electrical system, I have the truck fixed and starts just fine with the key. I have to re-connect my 555L and see if the RS is going to work now. And I must say that I am kinda glad this happened because of the knowledge I have gotten from everyone on this vehicle and it's system. Now I will say again. THANKS to everyone. Oh, yeah, I almost forgot. This is what the problem was. (drum role)......................................"blown fuse" on ignition A. I checked all these fuses numerous times and never seen it. But I decided this afternoon I was going to pull all fuses and check continuity with my meter. and the 3rd fuse I came to tested bad, so I looked at it again and sure enough, It had a hair line crack in it. So, THANK YOU everyone!!!!!!!!!!!!!!!!! Now I am going to do my 2003 Dodge 1500 Hemi.....

Congratulations.Certified Security Specialist

Always check info with a digital multimeter.

I promise to be good.

Tell Darwin I sent you.

I've been sick lately, sorry I won't be on much.

Glad to hear you got it working. Don't ever forget to check the simple *&$%# first. Now go and have a beer!sparky