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  1. Reluctanse

    4L80 1-2 hard shifting now all of a sudden

    Ok not a GMT400 but- Wife’s 2007 Suburban 2500 with 6.0/4L80 started shifting hard been 1-2 recently, during normal driving. Trans was rebuilt about 45k miles ago, been drama free since then until now. Everything else behaves normally. I replaced the filter about a year ago. No SES light, no...
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    Alternator slow to start charging

    2000 k3500, 7.4 vortec with 0411 sap: It got cold out, and the truck was weak to start— but it started. Battery was probably a little weak but it did start. However the alternator didn’t start charging right away. It was as of the alternator wasn’t doing anything, verified by 11.2 volts at the...
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    O2 sensor connector pigtail is gack’ed… pointers on replacing it?

    2000 k3500 l29 truck Been chasing misfires and I might have found the culprit… I went to replace the o2s and found this… Drivers side o2 sensor connector is pretty trashed. Cannot even get the new o2 connector to seat. Problem is there’s no slack at all and the harness runs up between the...
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    Enabling Lean Cruise on 0411 swap

    EDIT: 0411 swapped 2000 L29, using the '03 express van original tune file. I've done quite a bit of searching both here and around the web, and on the HP tuners site, as well as a few other locations and there's not a lot of detail.... other than a few posts here by @L31MaxExpress I don't see...
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    1995 GMC Sierra C3500 SLE on Cars and Bids

    Auction ends the 13th, interested to see what it goes for. 6.5 tho.. https://carsandbids.com/auctions/rGABjE1o/1995-gmc-sierra-c3500-sle?utm_source=listing_alert&utm_medium=email&utm_campaign=button
  6. Reluctanse

    HVAC Blower issues

    2000 K3500- My blower motor is working inconsistently. I'll get in the truck, and no air is coming out. The controller itself is lit up, and the blend door controls are working, I can hear them when I move the selector. However nothing will come from the fan- totally dead. Then, and randomly, it...
  7. Reluctanse

    looking for a couple torque specs

    7.4 vortec, hoping I can get some quick help: -4 bolts over the cam cover -lower intake to heads -upper intake to lower intake -throttle body to upper intake much appreciated-
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    Reliable replacement brand ignition components?

    I’d like to get a new coil and ignition control module, proactively, and if nothing else so I can put my currently working ones in the tool bag as a set of spares… But what is even a reliable brand these days? ACDelco seems over priced for the Chineseum they are likely made of… any trusted...
  9. Reluctanse

    Would you still get an alignment done?

    OK so it's on my '07 and not on a GMT400, but all the same rules apply- I replaced all the tie rods, doing my very best to mesure and install the new ones as close as I could get to where the old ones were set. I am confident I got them within 1/16" of where the OG stuff was. Got everything back...
  10. Reluctanse

    0411 Pinout Contact for Lextech

    Lextech never checks in here anymore, however he can still be reached by his email for anyone needed the pinouts for an 0411 swap. As of 2023 he is still charging $20, and responds quickly via email. [email protected] Maybe a mod can sticky this? Or update the original 0411 swap post...
  11. Reluctanse

    Patch a small hole in a catalytic convter

    It's not on my truck, but same same for exhaust so I figured I would ask here as SOMEONE has to have experience with this kind of thing. There's a pinhole leak on the cat in my '05 Toyota Matrix. I am looking for a literal bandaid fix here. I would just weld it, but there's no way to get my...
  12. Reluctanse

    14 bolt FF service - brakes and lube job - a couple questions

    EDIT: Better throw this in there, truck is a 2000 3500 CCLB with the 7.4, SRW, 4.10 gears. For peace of mind I want to do the rear brakes on my truck, and probably put in some fresh gear lube while I'm at it. I'm working on a parts list, but I've never torn apart a full floating rear end...
  13. Reluctanse

    Vortec 7.4 keeps blowing up water pumps

    Today was #4 and the most spectacular, explanation below, but first, pictures Why would my truck keep blowing up water pumps? Never seen anything like this before. First pump cracked by where it attaches to the block last november, while I was doing a crank relearn. At ~4500 rpm a...
  14. Reluctanse

    L29 0411 Swap - Struggling with crank relearn and P0300

    OK I am struggling to get this thing to run right. Here is what has transpired to date: 1. Swapped in the 0411 ecu using Lextech pinout -here I included 2 wires out from C1: Pin 32 and 34 that I can ground for crank relearn 2. Using HP Tuners, reflashed ECU to the 2002 Express Van 5.7 tune...
  15. Reluctanse

    0411 swap L29, now no idle

    Hiya, I finally got around to doing my 0411 swap. It went pretty well overall but I have a few kinks to work out. It's late in the day and I'm calling it, but I'll be back at it tomorrow, I pretty much wanted some direction on a no idle. At initial fire-up it idled fine, until reaching about...
  16. Reluctanse

    temperature - gauge vs ecu data, same sensor?

    My temp gauge reads low, from where I think it should. Hooked up my bluetooth dongle and app to confirm, ecu temp reads higher than the gauge "seems". could be the gauge motor, but I'm wondering - I know the older trucks have a dedicated sensor for the coolant temp gauge vs the ecu's sensor...
  17. Reluctanse

    trans temp pid - 2000 K3500 w/4L80E

    I'm hoping to save myself a few bucks here and not need to buy a trans temp gauge but I'm struggling to figure out if it will work... Looking for transmission temp PID, I use OBD Fusion (IOS) and a cheapo bluetooth reader, but the GM PID I have for trans temp does not pull any data. Does anyone...
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    Riggs - My 2000 Chevy 3500 4x4 CCLB work truck and family play machine

    Got this new unit today. Up until 5 years ago my wife's daily was a '98 2500 Suburban with the 6.5. I loved that truck, sad when we sold but the wife wanted something with car seat latches.... Anyways ever since had a GMT400 hole in my heart that needed to be filled, which I did today! Welcome...
  19. Reluctanse

    Just bought a 2000 crew cab... help me figure out the best/cheapest way to seat 6

    Hi guys, just got a 2000 crew cab today. I was shopping for a truck with the front bench already, but beggars can't be choosers. Found this truck after looking for a month, and it was the right price. So, now I would like to figure out a 3rd seat up front. Here's what we are working with - you...
  20. Reluctanse

    GVWR SRW vs DRW

    Looking for GVWR numbers for a dually truck, cannot seem to find them anywhere. Found the SRW numbers but dually is escaping me. Any help is appreciated -
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