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  1. swathdiver

    Cold Air Intake for the most power??

    22844822 A stock Gen III (5.3 or 6.0) or Gen IV (5.3) LS doesn't see any real gains from an aftermarket intake system. 6.2s do benefit from one. The Volant or Corsa system was tested by BlackBear among others and came out on top. Volant used to offer a scoop for theirs for the SUVs but now...
  2. swathdiver

    2017 Escalade/Denali L86 "requires" 93 octane - your experience?

    What was wrong with a Caddy Cavalier? Love my 6.2s, they put a smile on my face every time we get behind the wheel!
  3. swathdiver

    2017 Escalade/Denali L86 "requires" 93 octane - your experience?

    The trucks do not calculate the grade of fuel and run an appropriate table. The computer advances the timing until it detects knock or pre-ignition and then it pulls timing. Rinse and repeat accelerating from every traffic light, on-ramp and passing a car on the highway, etc.. Our trucks are...
  4. swathdiver

    Can you off road in a Yukon SLE without 4WD??

    When we go off-road, we like to see how far we can go sometimes before having to engage the front axle. They are pretty capable on good dirt and even better with AT tires. Have seen the 4x4 Tahoe/Yukons/Avalanches go everywhere the Wranglers have gone.
  5. swathdiver

    2008 GMC Yukon Denali - Stay away?

    Remember that your Tahoe has some creature comforts and tech that the older trucks in this generation don't. Then again, the 2012-2014 are the ultimate in tech with cruise control and towing improvements. Not a big deal to most of us but just making you aware. The earlier ones also have...
  6. swathdiver

    Towing

    There is still too much weight behind the trailer's axles compared with up front, even with the WDH. It can only cover up for so much. Take the rig to your local CAT scale and weigh the trailer on two scales and then hooked up as if on a trip. Download the CAT Scale APP, so you don't have...
  7. swathdiver

    Axle ratio to tire size input needed

    Ok, so you have regular ACDelco shocks out back unless someone installed Nivomats. 2007 was the last year that ZW7 was paired with G65 which was the Nivomats back then. When such trucks were new, there was a noticeable rake to them as they were designed to run comfortably with a load on and...
  8. swathdiver

    This truck is incredible

    Glad you're ok, now go out and get another! This is why I drive these things.
  9. swathdiver

    Yukon, SLT vs Denali ride quality?

    Generally speaking the higher trim level suspension does indeed deliver a better ride even with taller wheels. On the flip side, the system is more costly to maintain/repair over the long haul but I do not know the specifics on your generation compared to the 2007-2014 of which I am more...
  10. swathdiver

    Recommendations

    There was a fella on here a few years ago that used Amazon parts to make his Tahoe faster. Look up the posts by @badandyturbo. He's not on here anymore, sold the truck and is playing with twin turbo Fords now. I and others on this here forum have personally witnessed the performance gains...
  11. swathdiver

    Elecrical problem 2003 6.0 Yukon

    These problems ought to have triggered internal BCM codes that can be pulled with an IPhone or bi-directional scan tool. It does seem like a cluster issue but I would make sure the battery's state of charge is above 64% after resting for 24 hours. There's a guy with a youtube channel...
  12. swathdiver

    Axle ratio to tire size input needed

    I thought you had a 2013? Did someone add the Nivomats? They were only used on the 2007s with the GMT900 body style. You can do it with the right tools. Measuring and setting the pinion depth correctly is crucial, as is getting the rotating torque of the pinion right. I'm doing this right...
  13. swathdiver

    What to buy for reliability

    There is a new, lower temperature thermostat for the transmission or you can "flip the pill". Do not remove the thermostat and leave that compartment empty, doing that disrupts the flow to the cooler(s).
  14. swathdiver

    Motor Oil Brand vs Consumption?

    We should be coming up on the end of the 3rd oil change on Quaker State Full Synthetic soon and will send off a sample to BlackStone Labs for comparison.
  15. swathdiver

    2004 Yukon Denali 6.0 AWD- HELP runs like my rav4

    There's your problem. Replace the offending cat(s). Your symptoms describe a plugged cat.
  16. swathdiver

    Problems with worn valves. Need good advice

    Might be because of the LPG. It's been a long time since I read up on them but do remember something about using different valve seals.
  17. swathdiver

    14b 9.5" into K2XX

    GM made the 14-bolt semi-floaters with 6 lug axles in the GMT900s.
  18. swathdiver

    14b 9.5" into K2XX

    Right, you have a Salisbury 12-bolt which is supposedly stronger than the older 14-bolt. I do not know if they will drop right in. If I had your truck, I would drop in the Salisbury 12-bolt 9.76" gear, the one used behind the 6.2s. I think you already have 1415 u-joints too.
  19. swathdiver

    Axle ratio to tire size input needed

    So what do you want to see, rpms at speed with a given tire and gear ratio? The 2500 Suburbans and Yukon XLs have 3.73s gears with the 6L90, for the purpose of this discussion it's the same thing, gearing is the same in the two transmissions. The NHT equipped GMT900 pickups with 6-speeds have...
  20. swathdiver

    What to buy for reliability

    In this generation of vehicle, when GM redesigned the cooling system for the transmission they installed a thermostat on the side of the transmission to keep the temps up. Well, this limits their life to about 100K miles. All that heat causes the torque converter clutch lining material to fail...
  21. swathdiver

    Squeaking noise driving me crazy

    Don't hear anything either. Hook up your phone or a go-pro under the truck and take a quick drive to capture the sound closer to the source without the wind noise.
  22. swathdiver

    Now at FIVE AC system failures in four weeks...

    On the Yukon 900s we have to pull the bumper cover to get at the condenser. It only adds a few hours labor to the job when doing it at a shop.
  23. swathdiver

    Are all the gasoline engine issues just on the 6.2?

    More horsepower and torque from the same design and architecture. The 5.3s last longer because they put out less power. Take a marine diesel engine for an example. At 1800 rpm for a 100% duty cycle it may last 12,000 hours but at 2400 rpms for a 100% duty cycle it might last 8000 hours. I'm...
  24. swathdiver

    2022 Yukon SLE 4X4 Tire Selection

    You can go to LT265/70/18 and gain an inch in height. Go to a LT275-70-18 and you'll gain a little width and be just over 33 inches tall. Should work without rubbing with stock wheels as we've seen T1 wagons with factory 275-60-20s.
  25. swathdiver

    No indicator and limp mode

    Hey Michael, did I tell you that I almost scored a Canadian module? Seller used the wrong part number so they refunded me.

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