cranks but won't start with new key
- Thread starter Publius
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You need the transponder/chip programmed for your new key. When you put it in the ignition does the red blinking light quit blinking?
May help. Also try an original key to start so you know the new key is the issue.
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Depending on your year, which is great to put in your sig, you can either do a sequence of steps to program the transponder, or you might need Techstream. Instructions for both are in the FAQ and online.
If I am not mistaken you need Techstream or an advanced scan tool to program keys.
No, it is year-dependent. The earlier series are fully DIY.
“Programming” is actually a 2-part process.
1) the transmitter. This is the “clicker” part of the fob that unlocks the doors, sets off the alarm, etc.
2) the RFID chip. This handshakes with the ignition to allow the vehicle to start. Part of the anti-theft system.
Both of these, plus the physical cut, have to be done for the new key to be fully functional.
You did not say what year you have, so it’s hard to guarantee that you can DIY this, but the earlier model years are definitely DIY programmable.
Depends if your one key is a master key if you can program another one yourself. Does the security light on the dash turn off when you insert your existing key? If so, it's a master and you can program a new key using it, instructions are available online with a quick Google. If not, you'll need Techstream.
Yes, I have a 99 and can confirm this is a DIY job, provided you start with a master key (not a valet key).
Are you sure that's a valet key? Again, does the security light on the dash turn off or blink when you insert it? If all you have is a valet key you will not be able to program a new key that will start the truck. You'll need to call a locksmith that has the tools to program the ECU, the dealership doesn't do that any longer.
Next to the clock is a blinking security light, your answer to valet or master is whether that light turns off or not when you put the key in.
The red light (99) is right next to the digital clock above the climate controls in the center of the dashboard in front of shifter. Inserting a Master key makes it stop blinking immediately upon inserting the key in the ignition.
if the fob with the broken off key is a master and you have it in the truck when you put the other key in the ignition the light should go off, at that point you should be able to go through the programming sequence. I think…
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To clarify, does the security light stop flashing IMMEDIATELY after you insert the old key (master), or does it flash a second or two and then go off (valet).
Edited to add: this is the FAQ on the subject-- Programming a master or valet key - https://forum.ih8mud.com/threads/programming-a-master-or-valet-key.935935/
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