I recommend you read these and definitely you must read this before you buy a Ultimate http://www.chitownsyty.com/ click on the tech section MAKE SURE YOU READ THE ULTIMATE INFORMATION THAT IS IN THAT SECTION. Since you have a Saudi Sy you don't have a O2 sensor. If you are not running leaded fuel you would need to wire that back in for the Ultimate or get the Ultimate set up for running only in open loop mode if you are running leaded fuel or don't want to add the O2 sensor. I believe that GM just clipped the wires off where they enter the loom. I think I remember seeing a picture like that. IF you don't know what these terms mean you need to do some basic research. Many people buy a lot of parts for these trucks and then when they don't work they complain about the parts even though the real problem is they don't research what they are doing and/or don't have a truck in good running condition before they start modifying. Anyway the Ultimate is the best chip out there for stock trucks with bolt-ons. The others aren't that good an they could hurt your truck. There are also other Ultimate configurations available for some other mods you'll see when you read the chip page. Definitely hard wire the IC pump and replace it with a better flowing pump. Go here for that and other mods http://www.sytyarchives.com/howto/ Gauges- at a minimum you need a boost gauge Tach would be good fuel pressure would be good . other possibilities are trans temperature, EGT, etc. The first three I think are the most important. Steering wheels are the owners preference If it fits a 1991 GMC Sonoma it will fit a Sy. So a search you should find plenty of info. Also you can search the list archives and search at syty.net Hope this helps Patrick Johnston
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