This applies to all 02-05 4.2s?
02-05 7x, P10 PCM
06-07 7x, P12 PCM
08-09 58, E67 ECM/T42 TCM
2003 will go into a 2006 as long as the 2006 PCM and harness is retained. You'll have to move the ECT sensor, swap fuel rails, and swap your AIR solenoid over. Otherwise bolt in.