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  1. Bextreme04

    Parasitic draw

    Yeah, you have to make sure you have the terminals in the right spot of the multimeter. My fluke will handle up to 10A, and if you have that much draw... you would know it. Just use a light at that point. A 10A parasitic draw will pull a modern battery down from full charge to completely dead in...
  2. Bextreme04

    Modern center console rear a/c and heat

    My 2011 Burb has both controls and vents in the back of the console, but most of the cooling comes from the rear system that is contained behind the side plastics in the very back and is plumbed through vents in the ceiling. If you can get a good pick off point from the front AC box, you could...
  3. Bextreme04

    Idle Emissions Help

    Turn both idle screws all the way clockwise until they lightly bottom out. Then back them out 1-1/2 turn. You will need a tach to properly adjust the carb, I use a timing gun with a tach function on it. You will need to adjust the idle screw to be at 700 RPM with the engine fully warm, choke...
  4. Bextreme04

    Parasitic draw

    Disconnect negative battery cable. Set digital Mulitmeter to read "A". Connect one lead to the battery cable, connect other lead to the negative terminal on the battery. If you have a parasitic draw you should see something more than 0.5A on the meter with the key off. Start pulling fuses one by...
  5. Bextreme04

    GVW

    Also, the "M" code engine designation in the VIN means it was the high GVWR(over 8600lbs) that was the cutoff for heavy duty emissions in the US at the time. HD emissions meant that outside California it would not have EGR, smog pump, or catalytic converters installed.
  6. Bextreme04

    GVW

    Mine was just old enough that C6P didn’t exist yet and the GVW isn’t in the VIN. GM made changes after 81 though and your invoice would include the C6P RPO and they will also send you a VIN decoder that will show you have the high GVWR, which is the “G” in the 4th VIN digit.
  7. Bextreme04

    GVW

    This is what they sent me when I sent in the request. Notice mine is a 1980 K25 with the 8600GVWR
  8. Bextreme04

    GVW

    The only way to do that since everything is missing from the truck is to email the GM Heritage archive at [email protected] or fill out this form here: https://www.gm.com/content/public/us/en/gm/home/heritage/archive/archive-form.html They will charge you $50 USD and then you...
  9. Bextreme04

    ls swap water- camaro pump?

    yes, both ports are on the passenger side on the trucks, but the truck upper hose runs across to the drivers side port on the radiator. If you use a camaro water pump, it changes that port to the location in the pics above and then you use the stock squarebody upper radiator hose. So you either...
  10. Bextreme04

    Any black two tone trucks out there?

    Wow, very similar to my truck. 1980 K25 Sierra Classic(same as silverado trim) with Midnight black metallic and Mystic silver metallic two-tone. The Mystic interior in mine is White plastics with gray carpet/dash/seat You can see a decent pic of what remains of the paint scheme on mine in my...
  11. Bextreme04

    ls swap water- camaro pump?

    I'm confused why you wouldn't just use the stock truck pump and accessories if they are already on the engine. Run your heater lines to the truck pump lines, run the steam port line from the LS to the previously used heater return nipple on the stock radiator. Run stock LS truck upper and lower...
  12. Bextreme04

    Straight pipe question

    You won't hurt anything except your ears. Unlikely to help anything either though unless they are completely clogged up. Why would you want to just run straight pipes?
  13. Bextreme04

    Aux Battery Tray local

    Maybe I'm confused on what you are talking about here. There should be a piece of metal that acts as a connecting bus between the two studs. It does not act as a fuse or fusible link, just connects the two studs. There should be a connection to the right side stud via a fusible link from the...
  14. Bextreme04

    Possible to run EFI tanks without the internal pumps?

    That's what I have been running on my 1980 for the last year or two until I actually get the L29/4L80 into mine. I have the EFI blazer tank and EFI sending unit in mine with the bottom of a non-efi sending unit cut off to put a sock pickup at the correct level to pull from the bottom. I used a...
  15. Bextreme04

    Aux Battery Tray local

    You can buy fusible link at any box auto parts store in the electrical isle. It should be 2 sizes smaller than the wire it is protecting.
  16. Bextreme04

    PerformaBuilt 4L60E !!!

    How do they "build them" to shift early? Isn't the shift scheduling entirely in the computer controlling it on a 4L60 and 4L80? Unless it has a full manual valve body of course....
  17. Bextreme04

    Vintage air vs. stock dilemma???

    $450 and you can have every single major component in your AC system brand new. The only items that are hard to find and might drive up the cost and ease of replacement will be the actual boxes and doors/actuators in the engine bay and inside the cab. If everything is present and just hasn't...
  18. Bextreme04

    Vintage air vs. stock dilemma???

    The only reason to do a vintage air system is if it isn't an AC cab to start with. If it is an AC cab and you have all the stock components(or even some of them), you will be far better off just using the stock system. If it is in good condition and charged properly it will freeze you right out...
  19. Bextreme04

    Help with a possible transmission issue

    Also, if you are rebuilding and don't have a good parts cleaner, I have found it to be well worth it to disassemble and inspect, then put everything into a large tub and take it to a local machine shop or trans shop and have them run everything through the industrial heated parts washer...
  20. Bextreme04

    Help with a possible transmission issue

    Its about $200 for a full rebuild kit, just make sure it is for a 350C not just a 350. You can probably also just roll the dice and see what can be found on facebook marketplace or in the local pick n' pull. If you drop the pan and the fluid is burnt and dark, but no metal shavings, you can...
  21. Bextreme04

    Help with a possible transmission issue

    wow, I would not have expected that. 86' was the last year you could get a TH350 and it was only available as the TH350-C model with a lockup converter and even then only available as an option in the Vans and Trucks. I would have expected a 700R4, but they aren't easy to mistake for each other...
  22. Bextreme04

    1987 454 TBI down on power, runs good otherwise

    Yeah, that's not a trans issue. 100% sounds like you are running out of fuel or the throttle isn't opening all the way. I would definitely start by getting yourself a quality rebuild kit and rebuild that whole TBI including both injectors and the regulator. Then I would make sure that the...
  23. Bextreme04

    Where to buy LS motor?

    I think you mean Lingenfelter... if so, there were only a few prototype suburbans made and they did not have an LS in them. They had a 605cu.in. Gen VI BBC in them straight from the Chevrolet performance marine catalog. They did have a red painted valve cover and unique looking marine MPFI...
  24. Bextreme04

    1987 454 TBI down on power, runs good otherwise

    Since you are mechanically inclined, I would buy a quality rebuild kit and fully rebuild that TBI unit. Do both the injectors and the FPR.
  25. Bextreme04

    1987 454 TBI down on power, runs good otherwise

    when you are driving it and you say it "goes nowhere", do you mean that you hit a certain point in the throttle where the engine RPM suddenly shoots up and truck stops accelerating? Or do you mean that you hit a point where the engine RPM stays the same but the truck stops accelerating? If it is...

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