No, it's configuration is similar, but the relief/test port is at the rear of the rail past #4 injector. - Not on the bend leading back to and ahead of the injector ports #1 through 4 respectively. There is no press. Reg. Fitting or bracket to mount upon on the rail. Per the graphic you provided, the bend being the incoming end/fuel inlet, goes back to injector(s) #1, 2, 3, 4 and then the test port past injector #4. That is where the rail ends. Remove items 1, 2, 3, and the mounting bracket. Items 6 and 7, the Schrader valve, cap and port are at end past injector #4. The injectors I replaced were Delphi brand, not AC/Delco which I installed. I know Delphi has some affiliation with GM, but it seems unlikely that they were not original equipment. And I suspect they weren't the cause but I changed anyway to eliminate them as a possible failure scenario later--since truck is at 210,000 miles. Btw just wanted to say thanks again for your time on this, it is appreciated, as vexing as this problem is/has been. Is it possible GM had 2 (or more?) Different designs for this system? I saw a YouTube video after doing a search for "2000 GMC Sonoma 2.2l flex fuel rail repair" or something similar to that, and the guy in the video had an identical set up as mine. Used his video as reference for r&r of my rail.
Tuesday, October 4th, 2022 AT 8:32 PM