will 01 gauges swap into my 99

[Ramsey]

without any kind of modification.

[Dano]

I am pretty sure they will. I haven't had an '01 In my '99.
But the Odometer will be wrong (milage is stored in the cluster)

[jneary]

you should get the odometer changed to the correct mileage. the pcm stores the actual mileage in it, and if you went to sell it you would have to disclose that info.

[Ramsey]

not worried about that, never gonna sell it, and if i do i will tell. just want to make sure the wiring is hte same