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    2008 5.3 Engine Oil/Filter + Octane Rating

    Did you check the oil level sensor on the block on the passenger side of the engine. I had to change mine out about 80K ago and based on the oil around the area it had been leaking a bit when I changed it. If it was leaking much it could make one think it may be a main. Just a thought.
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    2008 5.3 Engine Oil/Filter + Octane Rating

    Cruel, regarding your comment about a slight amount of oil around the filter, I would check the oil cooler block plate which is above your filter. The gasket is prone to seeping on these with a few miles.
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    Torque Converter or Transmission

    I had mine rebuilt with Billet TC, Sonnax valves and the updated thermostat = $5,200.00.
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    Seat cushion- OEM, Durafoam or eBay special?

    Here are the pictures of the leather replacement bottom seat cover on my 07, I had it replaced about 60k ago. You,ll notice in the back where it is short and the non-leather gray material is showing (Pix 2). Like I said previously, the guy I had do it, built up the cushion some so it may have...
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    Seat cushion- OEM, Durafoam or eBay special?

    Dub, I get a picture posted tomorrow, sorry for the delay got tied on some things and forgot. Tim
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    Seat cushion- OEM, Durafoam or eBay special?

    Dub, I did it about 3 years ago and 60k. I'm not a big dud, about 205. Yup, he built up the cushion because the edge toward the door was breaking down. At the time I couldn't find an aftermarket and I didn't want to spend the $$ for OE cushion. I'll snap a picture and post it. It has held up...
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    Active Fuel Management disabler

    I have been using the Range Disabler on my 2007 as well. I plugged it in about 100k ago with zero problems. However, from what I hear doing the tune is the better option plus you get much more in the way of overall improvements in engine and trans performance.
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    Seat cushion- OEM, Durafoam or eBay special?

    Gents, I replaced the drivers side bottom leather cover with one I order from the same place Dave did. I had an auto upholstery guy do the replacement so I can speak to that process but the cover itself was of decent quality. The fit is a bit short where it meets the back. I think the fit was...
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    Which oil and weight 2017 Tahoe

    SpinBall, I have a 2017 5.3L and use the Shell Rotella Gas Truck 0-20 (winter) and the same in summer except I add 2 quart 5-30. It probably doesn't make much difference but I pull a large fishing boat around the midwest and feel better about adding the 2 5-30 thinking it helps reduce heat/wear...
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    New to the forum, but searching for answers on a 2007 Tahoe

    tbGray - there is a sensor on the gas pedal which communicates with the throttle body may want to check into that. I have an 07 with 309k on it and replaced the TB at about 200k and it was still not responding well so I replaced the pedal sensor and ran fine thereafter. Also, maybe the cam...
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    Oil Cooler Block Off Gasket

    Fless, I looked through the pixs, thanks for posting the link. A quick question, I noticed you were concerned with a leak. Did if ever leak? Thanks, Tim
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    Oil Cooler Block Off Gasket

    Hey Tom, sorry for not specifying the drive train, it's 4WD. Thanks for the heads up on dropping the front shaft. Tim
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    Oil Cooler Block Off Gasket

    One question, do you need to drain the oil out of the pan or can you just drop the filter and let it drain out?
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    Oil Cooler Block Off Gasket

    Thanks Guys - much appreciated!
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    Oil Cooler Block Off Gasket

    I am diagnosing an oil leak on my 2007 5.3 (309K) and after reading some of the posts I am leaning toward the oil cooler block off, lots of oil around the filter. I am pretty sure is not the filter. However, other than taking off the plate, is there a way to know beforehand if its the wide oval...
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    Used high mileage Yukon vs Tahoe

    Kgee, I have a 07 Tahoe with a 5.3L bought it with 24k and it's at 307k now and I still drive it every day. I have had very few issues with mine other than regular maintenance until about 275k at that point I did a replacement of the cam sensor, timing chain/tensioner, cam and crank sprockets...
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    2017 Tahoe 6 speed

    Hello, I have a 2017 Tahoe which the trans went bad and had it rebuilt at a trans shop in my community. When they rebuilt it, they used a Billet TQ, Sonnax valves and shift kit and updated the thermostat. They also used BG trans fluid and not AC Delco fluid. It has about 3-4k on the build and...
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    2016 Yukon XL Needs New Transmission - Not Happy

    @ Wes, you are dead on regarding the clutch plates. When I went back to gt the vehicle and discussed that very point and the builder told me the shift kit is heavier duty and does tend to shift firmer/harder however you want to describe it. He said they checked the fluid for color and metals and...
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    2016 Yukon XL Needs New Transmission - Not Happy

    FWIW - I have a 2017 with the 6 speed, I had to have it rebuilt at 89k. The TQ started causing issues with shearing and throwing off metal particles which in turn gets sent through the whole unit which caused various issues including a flutter or surging sensation. The rebuild was done at a...
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    Phantom Rear Window Activity

    I haven't attempted to disconnect the switch yet. I was going to disconnect the battery for a bit and see if it reset properly. If that doesn't work, the on to option 2-3, etc.
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    Phantom Rear Window Activity

    After my 2017 Tahoe sat out in the sun last Saturday (98 degrees) the rear drivers side window all of a sudden would go down on it's own. I'd roll in back up and it will go back down, I put the window locks on and it stopped but when you take the locks off it goes right back down. I suspect it's...
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    2017 occasional Harsh shifting

    I guess you'll know in a few hundred miles. Keep us posted on outcome.
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    2017 occasional Harsh shifting

    Brew, Do you know if they filled with the different (or revised) ACdelco fluid that has been discussed in various threads which supposedly resolves the abrupt shift problem?
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    2017 occasional Harsh shifting

    Brew, I have a 2017 with the 6 speed and has 93k on it. At 89k, the trans failed, symptoms were jumping into neutral at a stop and hard shifting especially between 2-3rd. I took it to a reputable trans shop in our location and they stated the TC was going bad and shedding metal. They told me...
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    Oil Pressure Issue - Resolved

    @dustin, I used the standard pressure Melling M295. I was leery of using the high-output because the engine has 306k on it and already has a slight rear main leak. I thought it make make it worse.

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