06 Sierra swap
#2
TECH Addict
You can make it work but it is a gen 4 engine and you have a gen 3 engine. The 1999 to 2007 is a direct bolt in with the 05-07 being the better engine. You can also find a 5.3 L33 aluminum engine that will also be a direct bolt in. You can make the 08 work but you will have to change pcm and some wiring. the gen 4 has a 58 crank reluctor wheel while yours is a 24 crank reluctor wheel.