I got a extra #2 transmitter that I programmed to a #1. using a extra key I had made at dealership. the key would start car stand alone but now that I have programmed it to the extra transmitter which was also a #2. the key does not recognize the car but the transmitter will lock and unlock doors. how do I erase this #1 program for I can use my key alone? the dealership tried before I did and said I need a #1 transmitter.

 

What do you mean the key doesn't recognize the car? If the both keys start the car their is nothing to worry about with the keys. If both fobs don't work, you need to reprogram both fobs (it's in the owner's manual). Both fobs are electronically the same, You may program up to three fobs for your car, you just need to go through the process for them all at the same time. The first one you program will be the #1 fob, the second the #2, and the third #3. They must all be done during the same time or the car will only recognize the ones programmed during that process.

PS the dealer doesn't know what he's talking about.

 

The key and fob have no relationship to each other. A key will work with no fob and a fob will work with no key. The order you program the fobs will determine which memory button they correspond to on the door, but in no way does the key matter. The resistor pellet on the key must be correct to start the car, but it doesn't need to be "programmed". It just has to be the correct value. If one key starts the car and another doesn't, you have a wrong pellet in the key, meaning the dealer sold you one of the wrong value. Use an ohmmeter and read from one side of the pellet in the key to the other on both keys, they should match fairly closely.
One more time, the transmitter and key are independent of each other in every way, except you can hang them on the same ring. The starter system on the car doesn't care which fob you use, it only reads the pellet on the key to allow it to start.
Perhaps if you could describe exactly what you are seeing in an organized manner (and don't try to save words) we can help you get this going. Just for grins, include the year of the car you're working on in your questions.

 

You might also post your location, someone that is knowledgeable and here on the forum might live close by and solve your 'problem'.

 

I did follow the manual. the extra key worked fine by itself but when I programmed it to the transmitter it will not start the engine but the transmitter will lock and unlock the doors. so I have a good transmitter and now a useless key. I programmed it as #1 and my original transmitter and key to #2 that all works fine. so I need to erase the memory of #1 but I donot know how for I can use the extra key by itself. do you follow? the extra key would start engine by itself originally. but once I programmed the transmitter to the key the transmitter works but key does not. help

 

OK, will both keys manually unlock and locks the door? If they both lock and unlock the doors (there is only one key slot, on the drivers side on a C-5. If they both work in the door, then turn them over and try again, they should both work with either side of the key up or down. If they both lock and unlock the door, then the key iscut correctly, now you need to know if the 'pellet' has the correct resistance (the little pellet on the key) they must be match to the car was set at the factory and non programmable by you. Go to a competent locksmith and have him check out the coding for a match, dealers hire idiots that haven't a clue how this system works.

It sounds like you fobs are set up correctly, but the keys are not.
Again, where you located?

BTW, do both keys turn when in the ignition, but one doesn't start the car??

 

Sounds like your resistor is not being read properly rather than a FOB issue. Programming FOBs has absolutely nothing to do with whether the key starts the car or not. You should be able to lock and unlock and start the car with your Keyfobs in your sock drawer and the key in your hand.

If both FOBS are locking and unlocking the doors, then they are programmed correctly.

If one of the keys is not starting the car, then it's a key issue. Try cleaning the resistor on the key.

 

the extra key would only go in one way in the ignition switch when made. it will not unlock the door. my original key will unlock door and go in ignition both ways. yes,both keys turn in ignition but the extra will not start.it shows dash lights going dim when trying to start.
I think it is a key issue as you say. I agree, I set up FOB correct.
I live in eastern n.c. outside of Tarboro 27886

 

I do agree with what you and phanni are saying. I think they cut the key wrong. it only goes in ignition one way also as you suggest, will not unlock door. I will clean the resistor. god only knows what the dealership sold me?

 

Don't bother cleaning the resistor, just take it back to the dealer and make them cut you a good one. Sheesh.

 

the key did start the car when I hade it made at dealer. maybe it just picked a wrong time to screw up. it would only go 1 way in ignition switch and it will not unlock the door manually on door. it is a 2004 c5.
I am not to good expressing myself on the keyboard. sorry bout that.

 

Glad you got it all fixed.

 

Trust me, you didn't program or deprogram anything to do with the key. If you have your fobs working, stop with that programming, you're done. Now you know that one key works and the new one doesn't. I'd go back to the dealer and tell them you need a correct key made to replace theirs that didn't. It should go both ways and it should unlock the driver's door, the console and the glove box. It must have the correct resistance pellet for the VATS system in your car. All they have to do is measure the working key, or look up you vin in their system. If you don't mind losing the money they've already charged you, I'd go to a different dealer, or a locksmith.

 

I do believe I will go to a lock smith. I know a good one. I am with you.
I think I will swallow the $32.00 they charged me. they did take my vin # and match w/my key. i am sure they cut the key wrong.
thank you and all who have helped me.

 

Great info and hope the OP gets the key issue solved soon.

 

I have a question...

I have a new FOB I need to program (still have #2, but lost #1 hence the replacement). So my question is when I program the new blank FOB do I also have to re-program FOB #2???

Thanks

 

It appears he has the issues on the way to being resolved.

This thread is an example of why the Corvette forum pays us contributors so well,,,,oh wait.....

 

The correct thing to do here is start a new thread with your question instead of tacking on to a current one.
But to answer your question, you have to program all fobs in one sitting. If you program only one, the other won't work any more. So, go into the programming mode, program your #1, then program your #2 fob and exit the program. Whichever you program first will become the #1 fob to match your #1 memory button on the door, so since you have a 1 and 2, do them in that order.

 

Figured we were already on topic and thought I would ask. Thanks for you reply

 

That makes exactly ZERO sense.