I was wondering if you can swap a 3.4 for a 3.8 in a 2005 impala? Thanks!

Not directly, the subframe, wiring harness, axles, pcm, all different for starters.

Sorry to hijack, but how much approx would a 3800 engine cost with 50K or so on it.

How could we know that without calling a salvage yard?

Just curious what the range is, Anyone know how much a 3800 goes for new?