Originally Posted by OrdnanceCorps
Not to be a **** or anything, but what does a coded key have to do with changing out the dash? I'm honestly asking to learn. Also its for 2000+ he said 1999.
PATS was standard
on 2000+ models. Higher trims got it as an option before that.
But, if you need the Cliffs Notes version, gauge cluster shoots signal to chipped key, which in turn bounces signal back to gauge cluster in under the length of time it takes to turn the ignition to start the truck.
If cluster signal doesn't like what the key sends back, truckie no startie.
Hence, the reflash needed when clusters are swapped..