All the year truck injectors will interchange except for the ones that run on E85 fuel. The only thing you will have to do if they are different size in lbs is to have the PCM tuned for them.
But they are all plug and play.
New Truck on it's way: '07 Classic GMC 2500HD DuraMax LBZ
03' Silverado ECSB 4x4 Z71 LQ9, TR230, Patriot LS6, 31lbs, Trailblazer stall, Corvette servo, Corsa Touring,
HP Tuners
SOLD - 99' Silverado ECSB 4x4 5.3, Edelbrock RPM, Nitto Terra Grapplers, Texas-Speed Tuned 02' PCM, LT1 fans