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    2010 Tahoe LTZ electrical saga, need some input... - SOLVED

    Lmao I had no idea; this was the first GM vehicle I'd owned in roughly 15 years and we never even looked into using it. Well I guess that answers that even further, haha.
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    2010 Tahoe LTZ electrical saga, need some input... - SOLVED

    You guys are never gonna believe this. OnStar. That's it. That's the problem. Lol. More specifically, the VCIM or OnStar Modue. As with most of the other modules we've been suspecting, it's on the high speed lines...so when/if it goes, everything goes. I don't know what led him down that...
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    2010 Tahoe LTZ electrical saga, need some input... - SOLVED

    Might have been a misunderstanding, but the mentions of mileage and such are just the general interval between incidents, not consecutive driving miles all in one shot immediately prior to failure or anything. It's done it a couple times while running, but mostly does it on startup. Has done...
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    2010 Tahoe LTZ electrical saga, need some input... - SOLVED

    Well, we're trying the whole "test drive" thing again this weekend, lol. Made it out of the parking lot and on a few errands this time at least. Whether that's good or bad at this point, idk. He wouldn't tell us what he did this time and says he "has his doubts", so at this point I think he's...
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    2010 Tahoe LTZ electrical saga, need some input... - SOLVED

    Well, another week later and the best of the best in this area can't figure it out. We had had a phone conversation a few days ago where he was pretty suspicious of the BCM and was waiting on another failure to confirm. But I guess very shortly thereafter, he identified another ground...one...
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    2010 Tahoe LTZ electrical saga, need some input... - SOLVED

    Quick update (idk about anyone else, but I absolutely loathe when I'm reading through a thread on a similar problem to what I'm chasing and the resolution was never posted or the saga just stopped at some point. So I'm trying to be diligent about seeing this through on here.). Literally only a...
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    2010 Tahoe LTZ electrical saga, need some input... - SOLVED

    I've been suspicious of actual modules from the beginning (this wouldn't be my first rodeo with failing modules in a variety of vehicles and the behavior has been similar) and it was one of the first things I mentioned, but the first two shops completely ignored my concerns and glossed over it...
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    2010 Tahoe LTZ electrical saga, need some input... - SOLVED

    Small update for information's sake: Once the weather warmed, I did a full cleaning and re-grounding job of the two frame rail grounds on the driver's side, as well as the duo on the left rear body mount. Those four grounds ranged from "meh, bit of surface rust but still decent contact" to "I...
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    2010 Tahoe LTZ electrical saga, need some input... - SOLVED

    Yea, someone else mentioned it and I had actually mentioned it to the last shop but was brushed off. I just crawled underneath there (now that I have it back for a couple days) and it doesn't look like there's much corrosion in there, and none of the pins have backed out, but I'll still mention...
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    2010 Tahoe LTZ electrical saga, need some input... - SOLVED

    @Fless @Joseph Garcia Have an update for ya. After sitting for another week+ untouched with no updates (bringing us to a month now of this escapade)...I went ahead and pulled the plug. Picked it up, told him to send me a bill, and I'm going to take it to what will be a third shop on Monday...
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    2010 Tahoe LTZ electrical saga, need some input... - SOLVED

    Yea, that's been my experience in the past, when it affects multiple systems and features and is seemingly random it's a module issue, usually top-level like the BCM. I just wanted to cover the simple little bases first before I took it in, but also both these shops seem to be really zero'd in...
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    2010 Tahoe LTZ electrical saga, need some input... - SOLVED

    @Fless I have never noticed anything particularly odd outside of the normal swings from the RVC; nothing straying outside of normal patterns over the last 60,000 miles. @Joseph Garcia Yea, I plan on seeing if I can get a full list of the secondary codes next time we speak if they haven't fixed...
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    2010 Tahoe LTZ electrical saga, need some input... - SOLVED

    Our 2010 Tahoe LTZ has been an absolute beast since we bought it at roughly 125k; it's got 188k now and I've kept it in pretty solid condition the whole time in spite of heavy usage...and have avoided a lot of the typical problems with these things. Thing still easily books for 10k in my area...
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    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    Lol, so while digging into a different problem today, I decide to scan for Enhanced DTCs on my code reader and I come across a recurring P0573. Which is strange, because we've had zero issues with the brake lights, cruise control, etc. The switch (the usual culprit) is cheap and it's like a 5...
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    Throttle body relearn/high idle issues

    Wires are fine, air intake is fine, etc. I did discover that the PCV hose insert was slightly loose and pushed it all the way back in; not sure if that actually made a difference or was causing/would have caused enough of a vacuum leak to mess with the idle or relearn. Regardless, performed...
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    Wix v NAPA Gold

    Yikes, dude.
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    Wix v NAPA Gold

    It shows a Micron rating for those filters, but doesn't indicate whether it's nominal or absolute, and doesn't give an efficiency rating...so we're not actually given a true efficiency. A quick Google search can further explain what I mean...
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    Wix v NAPA Gold

    Curious as to what the efficiency ratings of those are. For example, I use K&N Gold filters, which according to that have the best Micron rating...but I have no idea what the efficiency is at that size. Micron rating is pretty useless without efficiency rating.
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    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    Welp, get to chase down the dreaded/random "Service 4x4" message as of today, on the heels of the throttle body and the air ride stuff. Gotta love when stuff hits 150k, lol.
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    GM 6L80 Transmission Information Thread

    6l80 here (2010 Tahoe LTZ). Have heard from a lot of folks (including a few on here) that 30-35k is the severe schedule that we should be sticking to on these transmissions. For me, that's about once a year, lol. Is it your opinion that it could probably go another 20k each cycle and be fine?
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    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    Did the air ride compressor and rear shocks finally weekend before last. Was a breeze; nice to not have a compressor that sounds like it has brain cancer, for one..but for two, it was starting to run a lot more and lo and behold, RR shock was leaking a bit. Went ahead and took a chance on the...
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    Throttle body relearn/high idle issues

    Did some looking and found some light discussion here about it previously, but I guess I'm just looking for reassurance and/or confirmation that this behavior is normal. Saturday night I got the P2135 (TPS reading invalid) and an engine throwing a temper tantrum. It was the middle of the night...
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    New member/new Tahoe owner here (2010 LTZ)! Loving it so far, but getting the runaround on a repair quote and also have a few questions in general.

    So I changed the oil today and a touch over 5.5 qts came out, so a) the guys at the new shop (who claimed it was almost two quarts low) might not be the brightest, and b) the dipstick is definitely "approximate". Lol. Not too worried. Was definitely darker than I wanted to see after only 2k...
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    New member/new Tahoe owner here (2010 LTZ)! Loving it so far, but getting the runaround on a repair quote and also have a few questions in general.

    Also not really happy with how dirty the oil is after only 2k miles; not sure how well the oil was maintained under previous ownership but I'm going to give it a couple more cycles to flush crap out of it and if it's still getting dirty prematurely I'll send a sample off for testing.
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    New member/new Tahoe owner here (2010 LTZ)! Loving it so far, but getting the runaround on a repair quote and also have a few questions in general.

    Shop raised a red flag about my oil levels while doing their "complimentary inspection" yesterday, said that I was close to 2 quarts low. Changed the oil about 2000 miles ago (first oil change under our ownership) and I know for a fact I put 6 qts in it. However, I admittedly forgot to check...

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