Well first of all you have to mark all youre lines to make sure u put it back were they belong then take it off and put in the new one were your old marking were at hope this helps
the injector spider is under the plastic plenium on top of the engine
pull off the upper intake plenum the injector unit sits down inside disconnect injector feed line from regulater(good time to replace that to) unplug the (spider) from the ports install new one
you have to remove the intake to get to them.
Where is the fuel injectors
The 2000 GMC Yukon Denali fuel pressure regulator is located on the back of the fuel injector pump. The fuel injector pump is located on the top of the engine.
If it is just one injector, it is a bad injector or a problem in the wiring harness or connector for that injector. If it is all of the injectors, it could be a fuse, the entire injector harness, a broken loose or unplugged connector on the injector harness, or the fuel pump or fuel pressure regulator.
It is located under the upper intake manifold, attached to the bank of fuel injector poppets also known as the "spider". The upper intake manifold must be removed to gain access.
Not sure what motor you have but the 4.3 L vorteck has a spider injector underneath the intake so pull off the manifold to locate the injector. Its like 2 or 300 dollars to replace but a common problem for that year blazer
on the fire wall under relay center this is the fuel pump fuse injector fuse is in the fuse block injector a if any at all what is the problem any whay.
on the fuel rail. depending if it is throttle body, or a vortec
A 94 doesnt have a fuel "spider" it is still throttle body injected
One in the fuel tank (pickup screen), one in the fuel line and one in each fuel injector.