will a gm 3800 series II motor fit into my 1999 pontiac grand am se?

Answer is if you have the MONEY and time Yes

But is it worth it ? NO

Best not to have to Change the Subframe it will have to be welded in.

If you can find a Ram Air 3400 HO (3.4L) out of a Grand Am GT and computer add Air intake cam change and exhaust. This would be the easiest swap.

But the Best thing is SELL the Grand Am and BUY a GTP !!!!!!!!!!

Or buy a Fiero and stuff a V8 in it for the same money ?.

There is no such thing as a "HO" engine from the GT. It is the same engine with the ram air stuff and dual exhaust giving it a few more HP at high speeds.

The 92' motor is going to be a different series(1,2,or 3). i think it is a 3800series2 motor but not positive. it would fit but it might need the ecu and harness from the 92 car also to be able to run properly.

It's not a direct bolt in. It'll take some work...no offense but it's a Grand Am, just drive it.

if it does you may also have to change the main computer as well for it to run right.

Y?

Just buy a Trans Am.