I just did conversion several weeks ago.
Here are the pictures: GM FI Spider upgrade pictures from trucks photos on webshots
Best $210.00 I've spent so far on parts!! The Jimmy runs great!
Here are the part numbers for the spider and gaskets.
GM PART # 17113215
MFI spider #12568332
GM Parts Direct: Your direct source for Genuine GM Parts
The kit is only two gaskets. One for the throttle body and the other for the uppermanifold. You don't need orings for the fuel lines. The orings are inserted into the new spider. Just push down the fuel lines into the spider and bolt down. Order the GM spider from GM parts direct. Pricey shipping but worth it. I spent <$210 for both part numbers.
You need these parts too.
1 can of throttle body cleaner
1 can of carb cleaner for the upper manifold
1 can for the air intake sensor
1 10mm deep socket for the manifold gaskets
1 5.5mm socket for one of the TB bolts
1 small tube of thread lock or sealer. I use the small blue tube type.
A small hex set to remove the air idle valve.
Clean the EGR valve and idle air valve too.
I recommend changing the map and throttle posistion sensors.
1. Disconnect the battery
2. Releave the fuel pressure
3. Pull and remove the harness wire connections from the air intake sensor all the way to the sensor on the passenger side of the intake.
4. Layout all the bolts and parts on a flat surface so you know where to put them back.
5. You can bend the fuel lines back far enough to remove the intake just be careful. Otherwise to remove the fuel lines, you may need the wrenchs that can go on a socket.
6. Route the spider fuel lines just like the originals. All should run forward from the FI spider bracket. You should only loop back the #5 and #6 lines.
7. Use the carb cleaner to remove the junk from the intake.
8. Don't drop anything down the runners.
9. Once the new lines go into the intake they won't come out!!! Snap in the new lines once you are sure that you won't need to remove them.
10. Use a dab of grease on the upper portion of the spider that slides up into the manifold. Use a dab of grease on manifold opening that goes over the spider. This will save you the trouble of having to push down hard on the intake to seat it.
11. Clean the TB really good. Remove the plastic weird looking thing on the TB opening plate. This will increase air flow.
12. GM did a good job on the gasket design. Just tighten the bolts to a snug. You can go back later and tighten them a little after the engine has warmed up and coold a few times. However you don't need to do this if you use the thread sealer.
13. Bolt down everything and connect the hoses.
14. Before installing the air intake hose, check for fuel leaks. Connect the battery and turn the key to ignition. Let the pump prime the line. I did several times so the pressure will buildup. If you don't see any fuel leaks, install the air intake hose, misc hoses, reconnect the sensors and wiring harness.
15. Start it up and check for fuel leaks!! Let it idle up to normal operating temperature before going for a test drive.
This is my first time doing a FI injection job. It was fairly easy. Just take your time and be careful. My Jimmy runs like a champ. I bet even my fuel milage will be better. I was down to 14 MPGin the city! I can already tell it's back to up the 16-17 mark and maybe more. Throttle response is awsome!! Idle is smooth. You'll like the conversion.