My key won't turn in my ignition, if it is my cylinder can i replace the tumblers on the new clyinder with the old ones to continue using my old key?

 

you can have the new lock cylinder coded to match the original.




inspect your keys. it is more likely the key is worn. if the edge of the key is gold and the silver is worn off...the key is worn out.
try a second key if you have it.

if you want to see if a new key will work...have them cut a not transponder key blank as it is cheap...if it works get the proper transponder key cut. if you get a new key cut....have it cut using a code....do not trace the old worn out key.

 

2005 Impala uses a transponder key? I didn't think that happened until the next gen in 2006 so what year did that start?

Other than that...+1 on getting the key cut to the VIN but shame on anyone that doesn't have at least 2 keys.

 

my 04 w body uses passkey3 which is a transponder system. check your key for a + mark or pk3 stamped in the blade of the key.

 

My Impala is a 2000, no markings on the blade, basically just a metal detector ring on the ignition cylinder. So what you are saying is that GM didn't use the same system throughout the life of the 7th gen? So all those people trying to do the bypass have 2000 through what year?

Now on my 2005 Venture it has PK3...which wouldn't have been around at the start of the that one...didn't even think about that before.

 

I just assumed it would be like mine but I could be mistaken.

 

Just proves that even with GM that while the cars look the same for a handful of years they are making changes instead of waiting for the next model.

Your info should be good for the OP though, he has a 2005.