: 2003 Northstar into a 2001 Deville



scott_sls
12-18-08, 10:20 AM
Most of the fitment stuff says it won't fit but looking at the 2003 engine everything seems to match up. Can anyone here tell me what we can't see here? It just seems as though it would fit. Sensors? Computer?

AJxtcman
12-18-08, 10:10 PM
Most of the fitment stuff says it won't fit but looking at the 2003 engine everything seems to match up. Can anyone here tell me what we can't see here? It just seems as though it would fit. Sensors? Computer?

pretty much all 2000 to 2005 can be used as interchanges.
If you interchange a Y and a 9 engine you could get a SES light for fuel trims. (Rich or Lean condition). That is an easy fix.
If you install a 2000 in a 2002+ or newer engine in a 2000 & 2001 you may get a Misfire DTS set (Differences in Cams). This is an easier fix. Just go to the dealer and ask to have the Crank Variance relearned