Ignition turns without key… new replacement does the same thing

[someotherguy]

well after lots of chasing things and replacing things and trips to the junkyard it was the short park lockout cable was out of adjustment haha. I guess a previous owner forced the ignition and broke it so it worked anyway instead of fixing/figuring it out. It was in park but the ignition cylinder didn't think it was in park.

The black cable that pops in just ahead of the tumbler? I wonder if the BTSI (brake to shift interlock solenoid) failed and they couldn't get it out of park, and just started trying whatever they could. Do you have to press your brake to shift out of park still? I've seen people break the whole cast mounting bracket for the shifter by going animal on the lever when the BTSI fails. Or my previous suspicion.. theft attempt

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Richard

 

[Brian71583]

The black cable that pops in just ahead of the tumbler? I wonder if the BTSI (brake to shift interlock solenoid) failed and they couldn't get it out of park, and just started trying whatever they could. Do you have to press your brake to shift out of park still? I've seen people break the whole cast mounting bracket for the shifter by going animal on the lever when the BTSI fails. Or my previous suspicion.. theft attempt

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Richard

I can shift without the brake. Since you seem knowledgeable on this area I’ll ask you. There are two solenoid/rods that connect at the bottom there at that white piece… the black one in my truck comes off very easily. I’ve bumped it off a few times working down there. What is the function of that rod.

I know there are different interlocks and stuff but I’m not sure what that one does.

 

[someotherguy]

Eh, my knowledge is a bit rusty as I've messed more with pre-Vortec trucks, but I have owned several, just many years ago now. The shift cable itself hooks up there of course, but also the BTSI that I mentioned. It's the black rod with the round part on it that has a 2 pin electrical connection. That's meant to prevent you from shifting out of park unless you press the brake first. Sounds like it's dead, or disconnected. Sometimes they fail and keep you from shifting out of park, so people disconnect them or remove them entirely. It's a safety device, that's it.

Richard

 

[Brian71583]

Yeah that seems like it “could” be broken so maybe that was the initial cause of all of this. May just leave it off lol

 

[tksoldierx]

Looking for some input on my ignition lock cylinder.

‘96 3500

The original one a key was not needed. You could start with no key, remove the key while running… whatever you wanted to do.

I got a new cylinder and installed it.

When installed the key feels rough going into and out of the cylinder. It can also be removed when running even with the new cylinder.

When the new one is removed from the vehicle the key goes in and out just fine. Re-installed and it is rough.

But the tumbler (new) can still be turned/started with no key.

What could cause this?

I also think the truck thinks the key is always in the for some reason. The door chime is near constant with the door open.

You can pull the door chime out - black box plugged in under the dash by the drivers left knee