This ones for you John, or I should say 89suburban. ok first off I didn't get any taking off the throttle body, but if need be I can later. Once it's off though... you have the fuel fittings on the back, return is smaller and will not fit in the feed hole so you can't mix them up. I think those were a 3/4 or 13/16 not sure I can double check and edit later. They have a nylon washer on the end so be aware of that. next up the top of the pod comes off, 4 screws around the injectors, one in front and one in back of each, then one in the middle, these are all short and the same length, then 3 inch the back, those in back are longer but all 3 the same length. that's the flipped over view showing the FPR. Now to remove it you take the 4 torx screws out, but it's under pressure, there's a spring inside, it's not really stiff, you can hold it together by hand, but it's a pain and to be safe use a c-clamp if you like. I did worked great. this is that spring.. fpr diaphram I tried to flip the cover around and it would not fit any other way so I'm pretty sure you can't screw it up going back on either. Just don't force the diaphram into place. now back to the TB itself, time to remove injectors. I laid a screwdriver down on the front edge of the pod, not on the injector, then used a flat screwdriver up under the lip(center area between the prongs has a lip) and pryed upwards using the first screwdriver as a fulcrum for the flat one. I'm guessing pliers or channellocks on that same spot would work too. once removed you will notice the big rubber o-ring and the flat washer under it. haard to see but the washer is in place.. both out.. notice that groove down in there? this one.. that is very important to place the injectors in the right way, mine had one in the back and then the other side it was in the front. The injectors have a roll pin in them that matches that groove. you can see it here.. Now notice the bottom of the injector.. lower 0ring removed.. then the screen is removed.. mine was dirty and discolored. next up back to the TB. notice the 3 pod screws 1 in front and 1 on each side, these were larger head/torx bit size then the upper pod screws. remove them.. then lift off the pod.. notice the middle? mine showed signs of leaking, looked like oil but smelled of gas badly. Now that's all torn down, and I already removed my IAC and TPS from the body. I thought of removing my throttle shaft and blades but haven't yet, will update if I do, and now it's time to clean it. I haven't done this yet. Not sure if I want to get some carb cleaner and soak it over night or a hour or two or what. Now is also the time you can do some of the ultimate tbi mods, like grind down the shaft, under the blades for more air and fuel flow, and cut off the front lips and radius them into the injector bores for smoother flow etc. I may try this, will update if I do.