Do all GM fuel injectors have the same physical dimensions?

[Cutlass3800]

Things {I think} I know about injectors:
1) there are high impedance and low impedance injectors
2) flow rates can vary
3) replacing 23 pound injectors with 30 pound injectors will require re-tuning the PCM

What I'm not sure of is whether or not there are physical differences (exterior) between injectors. Can I take the injector from a 3 cylinder Chevrolet Sprint and plug it into the fuel rail, injector boss, and wiring harness of a 6.0L Chevrolet Silverado? If I want 60 lb/hr low-impedance injectors for my 6 cylinder Camaro and I see some being advertised for an LS1 engine, will they fit my application?

TIA

 

[Ed Cannon]

From my experiance I think they are "physically" about the same size. The newest G.M. injectors are small.

 

[jrdrag]

The safest way to handle this is to get part numbers off of the injectors. For the most part, all high impedance injectors will be interchangeable but the tune will vary dramatically with flow rate. Low impedance injectors are very different. Not very familiar with them. Somewhere I have a huge list of injector part numbers that will allow you to find out exactly what you have.