Leaderboard

Sent from my iPhone using Tapatalk

I'm a rather conservative driver, and want/expect my vehicles to last for >150k miles. This is my first truck (2017 5.3 4x4), but am surprised and worried about that same transmission "searching" and clunks that make me thing I'm wearing down what SHOULD be a smooth tranny. It's basically the same in the 3 Sierra's I drove before buying, and in 2 more after. I guess I was hoping it would work or "learn" it's way out, or I'd figure out how to avoid it, but it just concerns me every time I drive around town (1st --> 2nd --> 3rd and then back down are the real culprits). So......if ANY kind of a tune makes the tranny work SMOOTHER, then I'm all in, cost be damned. I want a comfortable, smooth ride that at least gives me the impression it's going to last a long time. Any other "conservative" drivers out there have this same positive experience southern_sierra has had post-tune???

Found this on the TSB site. http://www.revbase.com/BBBMotor/TSb/DownloadPdf?id=201534 Causal Part Description Part Number Qty x CAP ASM-F/TNK FIL LKG 84009129 (2017) 84308352 (2018) Capless Fuel.pdf

Thanks Phil.

Unfortunately the people who will find our are the third and up owners who paid 5-7 K for 100-150 K mile truck or SUV. They’ll be thinking that they’ll get 200-250 K miles out of them like they did with previous non cylinder deactivation engines. They’ll limp them around with the check engine light on till they wouldn’t pass inspection. Then we’ll start seeing more used Toyota’s and Honda’s on the road and the resale value of used GMs will tank. The seventies all over again. Speculation of course. Sent from my iPhone using Tapatalk

the main point I was trying to make with his comment is that he may be right, but only because people are going to draw out oil changes to 8, 10 12k miles. I use synthetic and still change it at 3k. as I said in my post now they've released an oil that's "good for a year" and there will be plenty of people that will believe it, I am not one of those people. changing oil is cheap insurance and is quick and easy, but slightly messy to do. the oil filter location could have been thought out a little more for sure

Then I gather from the composite of all your post that we are dealing with a fairly low occurrence situation. 'I'm in Ford country' and 'mine (2007 ?) failed' indicate you've repaired two (?) or few (?) Given the unit sales over the LS/Ecotec3 run in your area alone that isn't allot is it? You state in another post that after a fix it stays fixed and assign it to poor assembly practice. Thus repair parts are obviously improved in any number of ways which indicates this is not in fact a design issue but a QC issue. Man is incapable of making anything with zero defects. Even NASA blows up a crew now and again. Perfection is God's territory. "Lifter failure" doesn't say much. We never learn if this is an excessive leakage (plunger) issue. A plunger sticking issue. A roller or roller bearing/pin failure. A locator failure. Each has it's own root cause. QC failed to control clearances. QC failed to catch heat treat issues. Design failed to engineer effectively although it seems ruled out in the 'stays fixed' statement if there is no visible difference. At this point I'm going to toss two cents on the table in question form and refrain from making a conclusion. When did GM routinely start using 207 F thermostats with a +/- of 3 F as standard issue? What happens to oil temperature when water temperatures are that hot? What happens to a liquids viscosity when heated? What is the upper temperature spec for SAE viscosity testing? Does the oil temperature exceed the SAE upper limit? If so by what degree? What is the viscosity at that temperature? What happens to boundary layer lubrication at excessive temperatures? What lubrication mode is in play in a plunger lifter? What happens to film strength at elevated temperatures? What prevents even hardened materials from failing in close contact at extreme pressures and loads? What happens to even good oils at elevated temperatures? Does it leave a residue? Will it affect a clearance? Does it matter if it is stuck collapsed or bleeds collapsed? Why isn't common sense common? Did I hint at multiple failure modes? Is there anything an owner can do about any of this?

No problem at all. Thank Phil he was a very big help to me. His video made it happen. Plus the cable did wonders. With out it I would be scratching my head finding what wire went were.

Truck is sitting nice, got the rough country fogs in, and wireless charging done in the console. Next is all terrain grill and heated steering wheel.

I know 1LE's handle well, did not know they could hang on a wall at 90°. ;) Did you trade your convertible or keeping it?

Hello All, New Sierra 1500 Elevation Edition Owner. Hope to pick up a lot of tips here. Mods so far: N-Fab Textured Podium Steps 20% 3M Color Stable tint Front windows KN Drop in Filter LED license plate bulbs Katzkin Leather Upgrade Rough Country Heavy Duty Floor mats

2.5 Level sitting on KO2s 285/65/20.

I am not ignorant of your plight nor of the commercial systems sins, which are many. I suppose this felt like a personal attack and for that I am truly sorry. It was not meant to be. What is was meant to be was a push toward scientific inquiry and in the end, relief. I believe in stats. I believe in science. I believe in God. In rational application of all the for-stated. Past that I have grave doubts. I rarely trust even my own motives and even less in my own knowledge. As the professionals you and I are I do understand your frustration. Those with a heartfelt love for this work and the auto in general are sensitive to this REAL commercial villainy and yes we feel a need to vent on that a bit now and again. I get that. I really do. But I also understand that in a forum setting it is the evil and not the good that sings the loudest. Thus the need for a statistical point of reference to prevent distortion and, silly as this may sound, attempt to do what a forum was meant to do. Help people. No one is denying that there is or was or even may continue to be an issue. The evidence is clear enough. It is no longer a question. What we don't know is how often. The gravity of the situation is relevant, is it not? 1 in a 1,000 is certainly not the same issue, or crap shoot, as say 700 per 1,000. You can see this, I know you can. Did the GM fixes work? If not each has it's own solution. That later demands I look for a different brand of truck. The former asks questions such as those I asked earlier. Is it a lubrication issue. A metallurgy issue? A design issue? The result of some habit of ones own making. Some things I can do myself, some need a fix perhaps I can also do myself. But we need information to do this and guys like you are our best source of that information. Even if you can't get your hands on that data what does an honest appraisal of your experience tell you? When you do a repair what does your postmortem revel? Give us a clue brother and hammer out a solution if one is to be found! Whose parts are viable replacements? Should I use using Crane Lifters if the GM replacements are no better? Has someone outside GM addressed this with success? Have any tips and tricks? You've already shown yourself a talented writer and an able tech. Now share it. Please...use your skills as a guide not a siren. There is enough unfruitful negative pilling on problems already.

These cars are so fast! Sierra Boy

If all goes well it will be here next Saturday

I did this with mine Sent from my iPhone using Tapatalk

I went with the Hypertech Max Energy 2.0 mainly to turn off afm. I also set the throttle response to tow mode a 25% increase and set the cut off speed to 112. I didn't expect much but the 25% increase in throttle response really woke the 5.3 up. I have had no more clucking or kicks in the ass or searching for gears in the trans. Fuel mileage my be down about 1/2 mile per gal.I hated the afm form day one and got tired of driving in manual mode all the time. I'm happy with the performance of the engine and trans now.

G19, G4. No desire to carry anything else.

if you shake it more than twice, your playing with it.