That's the EVO sensor. Eliminate it.
GM has recognized that it's problematic & offer a delete kit.
Or...go to the wreckers & pick up the non-EVO high pressure line, (Pre-'96) along with the fitting that goes between the pump & the line. Cheap! I got mine for under $10.00.
First pic is of the EVO & it's line.
#2 shows how to get that EVO crap off. Remove the 'C' clip, pull that first section off so you get access to the nut underneath. You'll see it once that first piece is off. Once it's all removed, be careful not to lose or drop the puck & spring in behind. It WILL fall out. Just make sure to note which way all that is facing before it does.
#3. That fitting required.
#4. The reason why.
#5. Installed. Note that the non-EVO line has an extra 180* bend in order to come around to the back of the pump.
A tip. Install, but do not tighten up the lines to the pump until after the the pump is reinstalled & steering box ends are attached. It'll make the install sooo much easier.
Mines been done for several years, now. No issues.
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