Well guys, The ECM came home today. They couldn't fix the old unit , said there were way too many problem with my old unit, so they swapped the prom from my old unit to the new.er but good unit off the shelf. and I showed you the picture of these locking shims ??????? well after ten minutes of screwing around with them I came to the conclusion there is no way their going to fit this ECM so I installed the big plug and the smaller plug, both fit excellently and I put a dab of Loctite Stick-Seal, get stuff, I used a Q-tip and put a dab on each end, Just in case. It gave me a fight fitting up into the ECM Plastic mound and once I had the black steel strap in the one end of the birth and the other around the unit and screwed into it's existing 3/8 flange nut. I called it quits. Biggest problem and I did this to myself, is the dash facing from LCM and I used #10 drywall anchors to go into the dash. The problem is, these trucks were built and assembled with the dashboard already put together with plastic studs, which had 10mm nuts already screwed on as a 1 piece unit. Once I had to brake them to install the new air conditioning outlets. Now the headaches start. I tried to use the 10mm nuts to hold on the passengers side air conditioning outlet. I was Very STUPID. I would up going back and installing the drywall anchors and so off it came and I put the drywall anchors in with the Loctite sealant/adhesive. It is the only way to do this with out braking it. I put it in all the anchors and a light coat on the trim strip prongs, waited 15 minutes and making sure the AC outlets still were working and pushed the whole thing together, and I put hand pressure on the whole trim panel in different places. Took about 30-40 minutes for the adhesive to finally to flash off and I could stop constant pressure and I sat back and drank a ice tea and just kept pressure on different places that were not holding straight. But it came out OK. The one thing I need to do is find some 1/16" chrome tape. The trim panel is painted silver a very thin line. The Silver paint wore away So I tried to repaint but my hands shake too much to do anything but make it a mess. I was worn out so tomorrow connect the Battery, fire her up and see how she runs. Do I need to put a little time and miles on the new ECM for it to relearn the truck ?