You have separate injectors on 2 common rails. 1999 and previous suburbans have the spider assembly. So, its cheaper to replace the injectors

 

ok, after all my research, simply put... most all the injectors are made by Delphi... they might come in a delco box (and cost $180 each) or you just buy the Delphi ones that cost much less and come in a delphi box.

i will be installing them in the next few days. i will update you all of the results.

thanks for the information guys!

 

so, i replaced all the injectors with factory delphi injectors... the original ones i pulled off are also Delphi... but no change!!!!! this is driving me crazy. i am still running very rich, the car is not strong like it should be, there is back pressure and horrible mpg... any other ideas?

 

anything, anyone?