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  1. R

    K2xx alternator upgrade on GMT800

    I sold my GMT800 Tahoe many months back, but I'm still into GMT800 trucks and have been for quite a long time. My wife's truck is a 2005 Suburban Z71 that is currently sitting at 245k. Original 5.3, clean as can be, oiled every year and washed regularly. Couple of Friday's ago, she leaves for...
  2. R

    Tahoe Fog lights

    Cool. Keep us posted!
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    22” SGM wheels with Toyo A/T on Empire Beige Z71

    Apologies if there is a consolidated wheel thread or if this combo has been posted before. Very pleased with these wheels on my 24 Z71. Wheels are the dealer option SGM 22” Gloss Black. Tires are P-metric 275/50R22 Toyota Open Country AT3s. The “monochromatic” look of Empire Beige and Black...
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    2021+ Wiper Arm Conversion (Pinch-tab to J-Hook)?

    On my 2024 Tahoe, as I would assume most of you have, the wipers are the pinch-tab style. I've noticed the T1XX Silverados have J hook wiper arms, as did the previous generation K2XX Tahoe/Yukon. Coming as OE equipment on the K2XX Tahoe/Yukon and T1XX trucks, the wiper blades are refillable...
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    2023 Yukon XL Windshield Wipers periodically stop working while driving

    Has anyone had any resolution to this?
  6. R

    The engine on the Yukon I got as a replacement for the Yukon that got two engine replacements needs replaced. Yes, you read that correctly.

    Do these newer 6.2s also call for 0W-20 like the 5.3s? I wonder if stepping up to a 0/5W-40 Euro or even a 5W-30 would have any bearing on the lifter lifespan? I mean the cst of a 20wt isn’t that low so I can’t imagine that’s the magic cure all, but just curious.
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    Which flavor of “LS” do I have after replacement

    An 08 LC9 would’ve been a 9.9 CR aluminum 5.3 achieved by flat top pistons and LS6 heads (799/243). As I’d not expect the dealer to install any run of the mill reman engine and flash a different calibration from that of which the VIN calls for, I would only expect them to have put a reman LC9...
  8. R

    What did you do to your NBS GMT800 Tahoe/Yukon Today?

    Started this past Wednesday -- on the 2005 Tahoe Z71 with the 6.0 swap. Wanted to refresh the cooling system and add an oil cooler. Lowered the front diff down a few inches, pulled the front driveshaft. Pulled the new K5L e-fans and snaked a new GM genuine (from an Escalade) oil cooler line...
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    Dorman 62340XD engine oil cooler lines "Improved Design"

    I am wanting to add the factory oil cooler to my 2005 Tahoe, including a new thicker radiator with the oil cooler. I like the design and idea of the Dorman, but I think I am also going to just go with the OE GM lines.
  10. R

    K5L Fans on GMT800

    It is regulated voltage control. The PCM regulates the alternator output... it's why sometimes you'll see less than 14 volts or over. When there's a high current demand the PCM has the alternator ramp up output to compensate. There was some discussion/thinking around that a RVC equipped...
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    K5L Fans on GMT800

    Those are the old part numbers, 15780796 has been superseded by 1580881, 15780795 has been superseded by 1580880. I bought both from Amazon and they were the Bosch ones I posted a picture of. Been working great. I will still make a video at some point... been slacking working on getting the...
  12. R

    2001-2006 Z71 running boards loose? Broken rivets behind cladding

    I searched on here (briefly, but did search) and didn't find much about one condition I've come to be a familiar with on the 2001-2006 Tahoe/Suburban Z71 trucks... loose running boards. The Z71 trim includes a factory "nerf-bar" style running board. These running boards are very securely held...
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    What did you do to your NBS GMT800 Tahoe/Yukon Today?

    While I was doing my running boards, my passenger side Z71 cladding has always hung low. Took it off to find the cladding bracket missing some of the 1/4 rivets. Also found most of the 1/4” rivets holding the top of the running board mounts to the rockers gone. Spent the after noon re-riveting...
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    What did you do to your NBS GMT800 Tahoe/Yukon Today?

    My OE z71 running boards were starting to oxidize and peel paint in certain spots, not to mention the amount of rock chips on the front. Pulled them off and ground down the corrosion with a fine 3” blue fiber wheel on my 12v mini polisher. I’m going for looks good 10ft away, not a show...
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    K5L Fans on GMT800

    I’ll have to hunt my local junkyards. Maybe if I pull a few I could make a couple bucks.
  16. R

    K5L Fans on GMT800

    Got the fan assembly in, bolted up and plugged in. Started the truck and they worked well. Low speed fans sound about the same, high speed sure is loud and moves some air. Awesome! When on high speed I did not see any voltage drop or issue. Volt gauge showed fine at 14. So I think I’ll be good...
  17. R

    K5L Fans on GMT800

    No nothing else really caught my eye. Front clip was gone. Had some 243 heads which is cool. Have a buddy who needs a set for his LS1 C5, but I didn’t feel like pulling them haha.
  18. R

    K5L Fans on GMT800

    Got the blades off, motors unbolted and everything washed. Good call on new motors. These spun hard with some bad spots felt in the armature. And they look crusty. New motors showed up. Genuine Bosch. Time to assemble.
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    K5L Fans on GMT800

    GM dealers and technicians have access to GM Service Information (SI). It lists all repairs or maintenance a vehicle had when it was at an authorized GM garage. Additionally you can take a VIN and list all RPO codes. I use a website called www.free-vin-decoder.com. It must have an API to pull...
  20. R

    K5L Fans on GMT800

    Thank you though for the part numbers and the offer advice. I think these 7/9 are not ever listed correctly. Will degrease and wash them up this afternoon, take em apart and put the new motors in and give em a spin. Think I’ll hook up a tech2 and make a video of them on low and high just for...
  21. R

    K5L Fans on GMT800

    I scored today! I remembered at the local wrecking yard seeing a PPV GMT900 Tahoe. I looked up their inventory and ran the VIN to find K5L. Showed up to it and the fans were still in it and in great shape! Super stoked for $25.
  22. R

    K5L Fans on GMT800

    Thank you all... gives me confidence with this. They are definitely easy to swap out, but the wiring/relays/harness was what I was curious on -- so thank you. Called up a local wrecking yard that 3x over guaranteed they had a 7/9 fan assembly and pulled it for me. Drive 30 minutes to pick it...
  23. R

    new from the land of chicken wings and rotted out cars

    Thank you all for the warm welcome. I will try to chime in and contribute what I know about P01/P59 calibrations, programming, HPT, PCMHammer/Universal Patcher and the GM SPS side of programming... in addition to other stuff.
  24. R

    6.0 Swap Time!

    Having the calibration on the PCM adjusted to run the LQ9 should be very easy for any tuner. You can license your current PCM with HPTuners and copy all of the engine and engine diagnostic parameters from the same or similar OS from an Escalade calibaration. Biggest thing you'll want to keep...
  25. R

    new from the land of chicken wings and rotted out cars

    Good afternoon, newer here to the forum. Been searching as of late about K5L fans, figured I'd introduce myself. Have a 2005 Z71 Tahoe 4WD with about 330k on the clock. Originally the truck was a North Carolina truck, before migrating up to Western New York in 2016. I am close to Buffalo and...

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