KLRV6

I would rebuild the trans before it fails. I have a 2015 5.3\6l80 with a CTSV converter I installed two years ago. The trans does ok, but just replacing the converter is not enough. There are valves (PR & TC), springs and the converter that must be replaced for long term reliability. I am gathering parts now and will go through the trans next spring. Total will be around $1500, but I will then control being without the truck rather than a parts combo that would more than likely fail while I'm traveling on the highway away from home.

Probably the torque converter failing and can't stay locked in 6th. If you haven't tuned the trans or replaced with a full billet convert, a rebuilt is in the near future. Drop the pan and check for metal or clutch material.

This video info includes that there is the potential failure for the CTSV/ZL1 converter also. It is a different design than the stock truck JBMX, he swaped in a JMDY which is not the same design. I am running the ctsv in my 2015 Silverado and removed 1-4 lockup. Shifts great and am now in the process of logging trans data to continue tuning shift and pressure specifics. Less than $500 for all the parts to do the swap including fluid and filter change.

The horrible vibration on my 15 CC was corrected by installing new Yukon Axles (rear) and rear rotors and pads. The driveshaft was balanced, but did not make a huge improvement. Check out the lack of mating between the axle and rotor. That will show just how bad the flange is off. The vibration was crazy betwwen 70-80 and could not go above that speed. I knew it helped as soon as I replaced them, now I just hear tire noise. The entire resonance of the truck changed.

New Yukon Axles (rear) and Raybestos rotors completely fixed my 15 crew cab.

FL335i, Thank you for your post!! The part#s and wrong PN# warning were a big help. I installed new Yukon axles, wheel studs, brake rotors and pads. It made a significant improvement to the point that I don't dread taking this on a 1400 mile trip. I can now hear the tire to road contact over the low resonance and vibration the truck had on the highway. I have attached images of the axle and rotor mating surfaces. Notice some of them on have 50% at best contact and that's just on one side of the bolt circle. I imagine there would be an improvement in just pulling the rotor off and rotating it 180 degrees and reinstalling. The wheels were torqued to 125ft lbs, so it should have complete mating around each lug.

Thanks for the updates on this never ending vibration saga. What is the part# breakdown and prices/vendors? It would be great to track how many of the truck vibration issues are resolved with these parts being replaced. I'm ready to make some purchases, just wanting to make sure the numbers are correct. Thanks!!

For the parts you are looking to replace, I would go to the dealer and ask to get the best price for all. If you order a fender or bumper online and it's damaged you will be weeks behind in your repair and still may not get a good one the second time... or third. I am looking to replace all the springs on my 15 with ones from a 17. The local dealer is within $50 of major internet GM parts houses. So in this case, the local dealer ends up making at a sale a better price than the online guys. This is not always true for all parts though and sometimes the local dealer is twice what the online have a part for.

Thanks!!! Can anyone dig up what this looks like and how hard it is to replace? All I can find is it's $32 online.

Could you please post what was on the work order? Part numbers replaced? Was a service bulletin referenced? Thanks!!! Any information helps us work towards getting our trucks fixed. I'm not sure about the new GM trucks, but my S10 had a self aligning steering column. As long as the alignment was straight, it would center itself over time.

I bought this one on black friday for $950. We store many things in there including electronics, external drives, documents (also have encrypted copies out on the interweb) and keepsakes. http://www.tractorsupply.com/tsc/product/cannon-ts5950-75-safe?cm_vc=-10005 For moisture control you can help the heaters by pulling the moisture out using silica. I bought some larger cloth bags and put this stuff in. Crushed silica on the cheap. Dries out the same as other more exspensive types. https://www.walmart.com/ip/Mimi-Litter-Cat-Litter-4-lb-Cats/12018928