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  1. Geotrash

    Chevy timing issues

    Okay. We’ve seen some issues with bad cam position sensors or related wiring issues. We’ve also seen situations where people didn’t get the cam phaser installed just right. Do you have access to a bidirectional scan tool that can log real-time data from the ECM?
  2. Geotrash

    Chevrolet Suburban 3500 Questions

    Thank you for your continued thoughts. I had this thought as well, yet entering the VIN in the GM software and website still returns that it has a power steering control module. And the cluster was programmed to the VIN as well, by White Automotive. The fly in the proverbial ointment though is...
  3. Geotrash

    Chevy timing issues

    Did you put in a factory cam or an aftermarket one? If the latter, which one, and did you have the ECU tuned for that cam?
  4. Geotrash

    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    Tell you what. I bought a new axle, but I will also buy a boot, repair the old one on the bench, and keep it in my inventory.
  5. Geotrash

    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    Y’all are hard core! A whole new aftermarket axle assembly is $75.
  6. Geotrash

    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    Got a leaking CV boot on the ‘07. What are y’all liking for replacement axles these days? OEM is an option at $269, but Cardone also makes new ones that sell for 1/4 that price.
  7. Geotrash

    What are the best AFM delete tune/plug in devices?

    In my view, Blackbear's full Autocal v3 tune is the way to go. Current pricing on their website. www.blackbearperformance.com
  8. Geotrash

    L83 # 6 MISS/SOLVED

    Thanks for following up, glad you got it figured out! It would be helpful also if you could update the subject with the word SOLVED at the end.
  9. Geotrash

    Gotta do a Rebuild, Gonna Upgrade Too

    Should be 12mm 6-point.
  10. Geotrash

    Chevrolet Suburban 3500 Questions

    This is what I’m thinking as well. However, I expected the GM software to be able to get the modules right. So, I’m thinking I still have a communication problem on the CANbus with the steering control module.
  11. Geotrash

    Chevrolet Suburban 3500 Questions

    Another good reason to keep the original cluster. If I ever have a problem that requires cluster programming, I can just pop in the original. In the meantime, I really like the functionality in the Denali cluster. The transmission fluid temperature gauge in tow/haul mode is wonderful, for example.
  12. Geotrash

    Chevrolet Suburban 3500 Questions

    Here's a little more detail on the errors. One other thing is that because the cluster isn't the one that came with the truck, I can't program/update it with the SPS software because the updates SPS wants to apply are keyed off the VIN. Starting to wonder if the Denali cluster upgrade was worth...
  13. Geotrash

    Chevrolet Suburban 3500 Questions

    There is. It's a lost communication code but it's for the HUD display, which my cluster has enabled but I do not have the module installed for. And there is also a security code error. You might be on to something though because the 1500's have electrically assisted power steering, but the 3500...
  14. Geotrash

    Chevrolet Suburban 3500 Questions

    I've been getting a Service Power Steering message every time I start the engine for the past few weeks. It started a couple of weeks after the Denali cluster upgrade, but I don't think it's related since there was a significant time lag between the upgrade and the messages starting...
  15. Geotrash

    Steering Shaft clunk and play...

    That play looks like it's coming from the steering rack itself, not the shaft. With the truck still on the jacks, grab each tire at 3 o'clock and 9 o'clock and try to move it back and forth while looking at both the outer tie rod ends and the dust boots. My guess is you have considerable play in...
  16. Geotrash

    0W-20 to 0W-40?

    For 5w-30, I run Pennzoil Platinum. For 5w-40, I run Amazon's Euro oil. I do 3K-5K mile oil changes, depending on duty cycle.
  17. Geotrash

    Engine replacement for Denali xl 2017

    $6K is a lot. It would be helpful to us to know what else they 'fixed' in that visit. To your core questions though: 1/ Yes, you can do that but you will want to take steps to mitigate the problem from happening on the new vehicle/engine. But regardless, a 2018 motor will bolt right in to the...
  18. Geotrash

    Oil Pressure and Driving Hard

    I lived in Colorado for 25 years, so I know what you mean. But the oil pressure spike you’re seeing is both normal on these engines and necessary to protect the internals at higher RPMs. And the GM LS engines are built to rev. They can run all day at 3-4000 rpms pulling a heavy trailer, and...
  19. Geotrash

    L83 to l96 swap completed finally

    The L96 in the suburban 3500 is the last of the great LS engines, and it’s one built to work, with no AFM. They’ll probably have to bury me in my suburban someday.
  20. Geotrash

    Are Yukons/Tahoes reliable?

    Yes, but if you have emissions testing where you live then you’ll have to pull the device a few days before your next test in order for the monitors to reset. And you’ll be reactivating an oil pressure-driven system that’s been dormant for potentially thousands of miles. One of the failure modes...
  21. Geotrash

    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    These are the ones I bought, and they do have a lifetime warranty. I've gotten to the point though where it's about an hour and a half per side to get these done, so not a big deal if I have to replace them in 5 years. https://www.rockauto.com/en/moreinfo.php?pk=6117468&cc=1502531&pt=10401&jsn=550
  22. Geotrash

    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    Well, shit. I did a bunch of reading and there were a ton of positive reviews, so I rolled the dice. I put a mix of Duralast uppers and Moog lowers on my '07 a few years ago because I needed the parts same day and that's all the local stores had. The rubber boots on the lowers are cracked and...
  23. Geotrash

    Chevrolet Suburban 3500 Questions

    Like you, I think 16/23 is fantasy. I've seen 20 on a 150 mile highway trip with just me on board.
  24. Geotrash

    Chevrolet Suburban 3500 Questions

    Well, it’s not a direct comparison to what you’re asking, but I used to pull the same camper with a 2012 Yukon XL with a 6.2 L. With that, I’d get about 7.5 on average towing, and with the suburban 3500 I’m getting about 8.3.
  25. Geotrash

    Gotta do a Rebuild, Gonna Upgrade Too

    I don't have any direct experience with the LT motors, but on the GenIV LS 6.2 in my 2012 (L94), I went with a 3-bolt cam (no VVT) and am thrilled with it. VVT on the LS engines was only good for maybe 15hp, which is easily made up for with a bigger "truck cam". Maybe someone who's upgraded...

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