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.

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.

My rhythmic hum was coming from the front right and was gone toady. It was faint last year, but much much louder this year. Any time the temps were below 45F is was very loud. - I had my truck up on jack stands (wheels off) this weekend to apply some wax undercoating. I sprayed wd40 on the front strut body, spring perch ring on the strut (soaked it from top to bottom) and any bolt that an alignment tech would need to get to. I also sprayed the lower strut mount and applied amorall extreme tire dressing on the cv boots and wd40 again to the cv joint hub connection. This was to keep the wax coating from sticking to things I wanted to remain clean. Well, today at 40F the drive was silent, not a little better, but silent. Something changed on mine as these trucks don't fix themselves or maybe I got lucky today. Can someone else give this a try?

I had called Michelin to see if and when they were going to make the defender in 18s and they only carry it in the smaller 18 inch, I believe for the tacoma size and a few others. No current plans for 265, 275/65/18. I have a friend who put the 20" defenders on his f150 and was very impressed with them as well.

Hi Tim, It's not beating a dead horse. I am sure today, someone signed papers for a new truck and has or will have this vibration problem. There are many people on here who can help you out with your information request. Right now, GM is the absolute, best sales person for the Ford, Toyota, Dodge and whoever else truck lines. All manufacturers have problems. The best ones stand behind getting the problem corrected and making sure the customer is taken care of. GM is turning their back on so many customers and service departments are not getting paid what they have in the repair time, so they give up on the customer. Statements like "It's normal" "Within specification" "They all do it" instead of working with the customer and GM to identify and resolve the issues. I was told by a tech this week that it's a truck, it's going to vibrate. Well, I looked through the Silverado marketing material and phrases like "Highly refined and precisely tuned to help squelch vibration for a smoother ride". They should not market this truck as anything related to being comfortable on the highway. It is unreasonable to keep a customer vehicle while the dealership and GM communicate back and forth for diagnostics. My truck was at the dealer for over three weeks. Most days I would stop by and it had not moved in their parking lot and I confirmed no work was performed. I have always owned GM vehicles, started when I was fourteen (1989) and paid more attention to color and option packages than what the competition had to offer. My 2015 Silverado has changed all of that for me. I save extra money with the full intention of eventually getting rid of this truck and moving to another manufacturer. Gone are my days of trusting anything GM has to say or offer. Best of luck with your information gathering:)

Are those the 20 inch rims you had the tires mounted on? I couldn't find defenders in 18 inch, so I just had the LTX MS2 tires installed. Two had to be replaced after 200 miles due to highway vibration. They were 16 and 19 lbs on the rfb. I picked it up today and the highest measurement was 10lbs with a greatly improved ride. They tech was helpful in that he went by the GM vibration diag sheet for balancing tires and tested them on two of the shops balancers to make sure all the numbers were the same. I am waiting two months, including an 1800 mile trip before putting bilsteins on the front. That way if it returns, back to the dealer I go.

Yea they look good. I would be driving one today, but the 14K difference from where I'm at now with my payment is the absolute, only reason I still have the Silverado..

Which ground is having the issue? Is it a loose connection?

I shot this today. Only up to 60 mph though. Will try to get one 70-80 this weekend.

The front has stock shocks on it. I just got the front 4600s in today, but am going to wait until I know about the driveshaft balance. I try to make sure the truck is as close to stock as possible when taking it in. It's kind of hard to say that shocks cause a bent/out of balance driveshaft though.

And the battery will last longer by not forcing higher voltage on it when not needed. I was worried when I noticed it the first time.