Thanks df2x4. I have had my truck sense 2002. About 2 or 3 year after I bought the truck, The EVO sensor on the column went out. When it did, the truck would jurk the steering wheel just a little while driving down the road. I had the local Chevy dealer replace the sensor. What the truck is doing now, is the steering will be very hard at idle some times. If I rev the engine, it is ok. It only does this maybe once or twice a month. I have changed the steering box 3 times. The OE box was bad. The second box leaked in two places, one of them was in the casting of the box. I even tried welding it, but that did not hold up, so on to the third box. This one leaked where the end cap is at the front of the box, where it was taken apart for service. I git it to stop with some stop leak, but this makes me wonder, what shape the PS pump is in. The fluid was clear when I installed the new boxes, but now after about 2 years, the fluid is dark, and needs to be changed. If I end up needing to replace the PS pump, I was thinking about replacing it with a pre EVO pump. When I had my 93 WT, I never had an issue with the PS. I also when I punch the gas and have to let off and hit the brakes quick, The steering get hard, like no PS at all. I never had that issue with my 93. If I need to change the EVO sensor, I would do this my self, but I want to get rid of the steering issues all together. If changing the PS pump to a pre EVo pump will do that, then that is what I will do. I was just wondering if anyone has done this and how it worked for them. Also will this effect the ECM at all. What controls the ECO system, the ECM ?
