I have an 02 Blazer with the 4.3 vortec in it. I am currently replacing the spider system for the fuel injectors but have run into a slight problem. I have disconnected everything and unbolted all the bolts holding the plenum on and I still cant slide it off. Its loose enough to jiggle around but it wont just slide up and off. It feels like theres some kind of bolt holding it in place inside of it but i have no idea how i would access that. Any help would be greatly appreciated as i am trying to finish this project soon.

 

I just did the same thing...If your sure you have all the bolts out there is a orange rubber gasket that goes around the top of the fuel distributor ( that the injectors hook to). you just half to pull upward on the plentum and it will pop loose. Just a bit of advise, make sure you replace all the plentum gaskets. I bought a set from the local parts store that came with the TBI,Plentum and fuel distributor gasket for $20. Also I would replace the Feul pressure regulator while you have it out. I speak from experience.....