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  1. K

    Leaky K5 tailgate

    Hey guys I have been working on my K5 power glass tailgate. Replaced the rotted sash, got the window all the way up now. Replaced the shot outer window sweep and it still leaks water into the interior. The sweep is seated nicely. I have the inside tailgate access panel removed and I found that...
  2. K

    4L60E transmission cooler

    Has anyone plumed a transmission cooler using AN fittings and if so do you know the thread size for the GM coolers that came with the quick connect clip fittings?
  3. K

    AN fuel line kits

    Hey guys got my LS set in my K5, I think I’d like to go with the AN fuel line kits found on ebay and the like. I will need a kit for fuel and also transmission lines. This will be my first time working with AN fittings. Does anyone know what size line is appropriate for a mostly stock 5.3? Also...
  4. K

    Bell housing / transfer case bolts

    Hey guys just got the LS dropped in my 87 K5 along with the 4L60E and the original to the truck np208. Need the following bolt sizes has somehow I misplaced them. - 2 bottom bellhousing bolts near oil pan (see pic) - transmission mount stud nuts (mount to crossmember) there are 2 of them -...
  5. K

    87 TBI firewall fuel relay

    Does someone have a pinout for this relay, or know which wires go where. Doing an LS swap and i know the LS pcm will supply +12v signal for the relay. I would like to use the existing square body relay and TBI fuel system and just replace the pump in the sending unit with one from a ~97 3500...
  6. K

    K5 rear window sash orientation

    Hey guys my rear window sash was completely gone so i have a new one in hand but not sure which way its oriented. There are two angles on it and some u cannel type things on the end. Which way does it go?
  7. K

    Rear glass sash rubber

    Hey guys, tearing into my k5 tailgate, the rear glass sash is completely gone. I found a replacement and the rubber strip that holds the glass into the sash. Apparently you form the rubber around the glass and then press or gently tap the glass into the sash with a mallet. I am skeptical...
  8. K

    LS regasket question

    Hey guys I have a 2004 5.3 LM7 that I want to regasket the oil pan, timing cover and rear main seal. I know they align with eachother and I have the timing cover tool. Wondering if its better to do this in a certain order, such as, covers first, then oil pan, or vise versa. Or should I just take...
  9. K

    Floor and rocker options

    Hey guys, I need advice on floor and rocker options for my 87 blazer. I want to do front floors, inner and outer rockers and supports. I am looking on autometaldirect and i am having some confusion with the options. For floors, the options are “front cab floor half drop in” and “front cab...
  10. K

    Driveshaft length

    I am dropping a 5.3/4L60E into my K5. I am using a fixed motor mount adapter from ICT billet that claims stock location, and an adapter for the transmission from Advance Adapters that goes between the transmission and the transfer case adapter. Overall, the 4L60E will end up 5/8” longer than the...
  11. K

    GMT 800 10 bolt in 87 K5

    Will the GMT800 2wd 10 bolt rear end bolt up in an 87 K5 Blazer?
  12. K

    4L60E range switch

    I am doing an LS swap in my K5 using an 04 LM7 and 4L60E out of a 2wd donor vehicle (all matching parts) Following the pinout chart on LT1swap I have chased several wires back to the transmission range switch. The remaining wires are, I believe for the PRND cluster indicator, and hot and...
  13. K

    208 Milky fluid

    I noticed milky fluid on the outside of my np208, on the bottom and by the output shaft seal. This truck is new to me. When i bought it i saw the same fluid leak but it was clean, not milky. Today i popped the top cap and checked fluid with an allen wrench and the fluid inside is clean. My...
  14. K

    LS freeze plug issue

    My LM7 i am using for my K5 swap has a freeze plug issue. I pulled the motor this past weekend and it’s on the stand. The donor truck was my semi daily driver. It had the 706 heads which developed a crack, I noticed quickly and replaced with reman 862s. I had a machine shop “give me their...
  15. K

    Remove 4L60E

    Pulling the 04 2wd 4L60E out of my donor truck for my K5 LS project. Will I lose fluid from the tailshaft if I drain the pan and cooling lines first? I dont have a plug or spare yoke… Can I allow the LS to tilt back or will it hit the firewall? Doing this outdoors so hoping for smooth...
  16. K

    Starter wiring for LS

    Wondering if I can just use existing starter wiring to run my LS or is there a reason it needs to come from the PCM? This is on my 87 K5 with a TBI 350
  17. K

    700r4 Manual Valve Body

    Hey all, I am getting ready to pull the trigger on a manual valve body, I have the option of engine braking or no engine braking. This truck is going to see a lot of street use. Which would be more preferable and why? Is the engine braking abrupt or is it comparable to say, letting off the...
  18. K

    04 LM7 into 87 K5

    Hey all, I want to pull the LM7 5.3 (dbw) of my 04 2wd and drop into my 87 K5. My plan is to use the existing 700r4 and existing transfer case (both fresh rebuilds) in the K5 and use a manual valve body and ratchet shifter. I think this will be a fun set up. For torque converter lockup I was...

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