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  1. TerryKing

    Heater hose Tee connections

    Hi Everyone, OK Now I understand better. Mine blew this morning on a short run. Phew. Hose broke at firewall, looks just like the photo 3 posts up. PLEASE point to overall How-To for replacing these hoses and the funny connectors! I'm worried I d not undersand the connectors. Thanks...
  2. TerryKing

    You Run A Mobil 1 Oil Filter?

    I went to the M1 212A because at -20F startup the oil pressure came up so slowly the "Shut Engine Down" error came on. The M1 was recommended somewhere for that specific cold weather situation. It Worked For Me: much fast cold oil pressure rise. 240000 miles now and running smooth 5.3L...
  3. TerryKing

    2012 Tahoe 5.3 Shut down 3 months. Will not start. Help? Ideas? FIXED!

    OK, AllGood!! and here's the final WhatIDid: Got used 'good' fuse block assembly. Disconnected battery negative. - Used "Deoxit" (https://www.amazon.com/gp/product/B00006LVEU/) on most all connections: - On the bench: Removed, cleaned and re-inserted every small fuse and relay on the used...
  4. TerryKing

    2012 Tahoe 5.3 Shut down 3 months. Will not start. Help? Ideas? FIXED!

    @Fless, I ran this for 10 min or more and felt the top of those nails. Not hot at all as I felt it. I measured the voltage between the two tops and it was .018V (18 millivolts) and I assume that was mostly from the resistance of the fuse/holder. I was able to ziptie the fuseholder a bit...
  5. TerryKing

    2012 Tahoe 5.3 Shut down 3 months. Will not start. Help? Ideas? FIXED!

    OK Here's the UGLY BUT RUNS for now. THANKS to everyone who helped with this. It's an amazing Forum of Friends... AND Thanks for the parts pointers; I have found a VIN matching fuse panel within 50 miles. THAT will be the actual solution. BUT In The Meantime: The UGLY connection with soldered...
  6. TerryKing

    2012 Tahoe 5.3 Shut down 3 months. Will not start. Help? Ideas? FIXED!

    WOW.. More Stuff I Never Knew! @Doubeleive Do I understand this right?? So, the entire top panel section with all the relays and fuses PLUGS IN to a series of connectors that come from different sections of the engine and body?? So are the fuse sockets and relay sockets part of the...
  7. TerryKing

    2012 Tahoe 5.3 Shut down 3 months. Will not start. Help? Ideas? FIXED!

    Wow do I HAVE to quote myself?? Sigh... MAIN GOOD NEWS and a large WHAT TO DO??? Tried to extricate the broken fuse pins with several tools/probes etc. No luck. I was worried about breaking the pin stubs off altogether. So I 'connected' a clip lead between the two points. Seat belt on, Key...
  8. TerryKing

    2012 Tahoe 5.3 Shut down 3 months. Will not start. Help? Ideas? FIXED!

    @Fless THANKS! I didn't ever notice those test points. Makes a lot of sense. Putting my head-mount magnifier on 82 year old eyes, I see those! --- LEARNING --- Regards Terry (Back after another priority job...)
  9. TerryKing

    2012 Tahoe 5.3 Shut down 3 months. Will not start. Help? Ideas? FIXED!

    FOUND Something: Going over the Fuel System Control Module tests in the link @Fless sent, before dropping the Spare Tire, AND: So I tried to lift fuse #21 a little so I could probe it. Seems stuck. Use needle-nose pliers.. stuck. Rock it a little and it came apart!!! I have the top half of...
  10. TerryKing

    2012 Tahoe 5.3 Shut down 3 months. Will not start. Help? Ideas? FIXED!

    THANKS FLESS and WES! OK I will be on it again in the morning... I need to get the spare tire down and then move truck out and open my pit and move it back. THEN I can get at all that... Wow.. This'd Almost Be Fun in the Summertime.... Regards, Terry
  11. TerryKing

    2012 Tahoe 5.3 Shut down 3 months. Will not start. Help? Ideas? FIXED!

    Thanks everyone for info.... Late but I'll get out there in the morning... LOCATION?? For the Control Module?? Have to lower the spare tire and it above spare location on bottom of body?? Is this the same item?? Supposed to be for my VIN...
  12. TerryKing

    2012 Tahoe 5.3 Shut down 3 months. Will not start. Help? Ideas? FIXED!

    CURIOUSER and CURIOUSER: No FuelPump Relay OR Fuse in main electrical box... FIRST: NO FUEL PRESSURE at key-on or Crank. DID hammer fueltank. But I have the actual photo of the layout of the main electrical box: There is NOTHING in the FuelPump Relay position and NOTHING in Fuse position 20...
  13. TerryKing

    2012 Tahoe 5.3 Shut down 3 months. Will not start. Help? Ideas? FIXED!

    I don't have access to a Tech-2 but I have a 'decent' OBII scanner and will check that first tomorrow. WHAT could be a "Security Issue"?? Sorry, no idea... Thanks! Terry
  14. TerryKing

    2012 Tahoe 5.3 Shut down 3 months. Will not start. Help? Ideas? FIXED!

    Hi Again, OK borrowed a fuel pressure gauge from Oreillys. Quick look 2 mins ago: I do not see a fuel test port at rear of the "Vortec" plastic top cover on passengers side, like some online view showed. And I hate to say I have never taken the top plastic cover OFF.. :-( Does it just come...
  15. TerryKing

    2012 Tahoe 5.3 Shut down 3 months. Will not start. Help? Ideas? FIXED!

    Hi and Thanks!! Fuel Pressure: How to test / What I need?; will be by O'reilly's soon.. I have done the rubber mallet on the tank but will repeat that. Is the pump fore or aft of that long tank?? Isthere a specific fuse to test?? Thanks Guys!! T
  16. TerryKing

    2012 Tahoe 5.3 Shut down 3 months. Will not start. Help? Ideas? FIXED!

    Hi Everyone, My 2012 Tahoe has run very well for years. Winter starts were OK. I had to leave it for 3 months to travel to Middle East. I added Stabil, fresh gas before shutdown. Ran battery maintainer. It 'rested' 3 months in my barn in Vermont. No Start. If cycling key on and off after...
  17. TerryKing

    Towing

    THANKS!! Yes I have those 2 cooler codes and GU6 rear.. We just drove/towed about 6000 miles to and from northern Florida and Vermont. Probably the 8th year of that. Before the trip I: - Dropped trans pan and replaced filter (looked good) at 80,000 (Transmission miles: it was replaced then...
  18. TerryKing

    Towing

    Hi Everyone, QUOTE" The 'pill' is a thermostat that prevents the transmission fluid from flowing through the external cooler circuit until it reaches something like 195ºF. That's a problem when towing heavy because by the time the fluid heats up enough to start flowing through the cooler, you're...
  19. TerryKing

    Is anyone running red, and blue flashing lights?

    Why not COVER Just the BLUE lights???
  20. TerryKing

    Which Oil filter do you use.

    "Tribology " - Yeah, I HEARD of it.. A bunch of woodworking guys talking about waxing jointer and saw tables. I DID that and it was good; also some rust protection. Lot of talk there about Stiction. OldGuyStoryWarning: OMG this all just reminds me of "Chick".. 1948 or 1949 my Dad would get...
  21. TerryKing

    Which Oil filter do you use.

    Hmmm. Some believe in Luck.. I believe in Metallurgy. And lubrication theory. My best friend from High School built serious B drag race cars. Much later he became the manager of the Military Jet Engine development group at Pratt and Whitney. "Wow!", he said, "Now I finally actually...
  22. TerryKing

    Which Oil filter do you use.

    2012 Tahoe 5.3: VERMONT sometimes "Wicked COLD!" I switched to Mobil1 filter (And oil) after searching on "Low Oil Pressure Cold Start". I had a couple of -5F starts where the oil pressure indication came up so slowly that the "Low Oil Pressure Stop Engine" warning came on. Saw some...
  23. TerryKing

    Your Preferred Motor Oil?

    Hi Everyone. One quick actual experience: 2012 Tahoe 5.3 200K miles. I noticed lower oil pressure at idle after about "50% oil life remaining". I had used Castrol Edge full synthetic and Fram TG filter. Based on a recommendation here a few months ago I switched to Mobil1 and the Mobil1...
  24. TerryKing

    2012 Tahoe: Cabin Air Filter??? Confusion....

    OK Here's what I see .. upper right with glove box dropped down. So maybe that's a filter for when running Recirculate Air??? The screen is hung on two little slanted pegs. @Galante: THANKS! I see where that cut would be made.. NOW I'm much less Confused about all this. We live on a very...

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