Tjheems

For is a brand new never installed Suspension Maxx leveling kit for the Sierra 1500 with magna ride. I purchased it myself and just never installed it - so I am offering it up for sale as I am selling my truck. Here is the link to the product, it is still in original packaging. https://suspensionmaxx.com/product/SMX-GM725 $115 +free 2 day shipping.

Just read this entire thread from start to finish...what a whirlwind of emotions! So I bought one of these 2015 GMC Sierra Denali 6.2/8 that was previously a buyback from GM....I talked to the dealer that bought it back (it was in maryland) and they claimed the P/O was making the truck do it...and they kept referring to driveline lash. I drove the truck and didn't see any problems or anything during the test drive...I ended up buying it. only 17k on it, and got an extended warranty. I've def. had the random harsh clunk about 1-2 times per tank, and a tougher shift in the early morning after it sat all night. It will give a hard downshift a few times on every drive and the hard shifts are only more apparent if I go into M-mode on the shifter. I also get this weird oil temperature fluctuation that shoots up and down and up and down for a little bit during driving (not all the time...still building the situation on that one...but I do have it on film). I've been trying to catch the clunks on film too, just so I have some..."see I told you it does it" when I go to the dealer. There was a litany of service records - mostly software updates and then a singular repair that stood out (the dealer said they did it to appease the guy - but he claims it fixed nothing). The customer claim was, "Customer states hard shift between 30-40 mph. SOP exists road test vehicle - verified concern. Contacted TAC for assistance, Case #8-118239145. Advised tech to replace valve body due to an intermittent internal failure per TAC advised to replace valve body. Filled Fluid to Spec. Performed Valve body MHCV Calibration Relearn. Test Drove Vehicle 18 Miles OK at this time. Old 8L0Y508000291571; NEW - 8L0Y608300471543" Part numbers used were Valve 4.265Y FP Number 24278901 and they used 8 Qts of 88861037S (DEXVI) Anyone have any idea what that actually means? I saw no reference to that specific repair in the entire thread. Everything else was related to the Stator repair. Also, got a little confused on the Transmission Fluid conclusion - so we determined that the recommendation would be a flush and replacement using DEXHP? Is that correct? Anyways - mine being a buyback has me all concerned to actually see what type of treatment I get at the dealership. They claimed there was nothing wrong with it when they bought it back (could never duplicate a customer concern) and it showed no signs of issue when they sold it to me. They had to give me an extended warranty of 12/mo and 12,000 miles on top of what was left of the factory - and I bought an extended warranty beyond that (which I cancelled through them and actually purchased through USAA). My truck is a '15 Sierra 1500 Denali with the 6.2/8, built 05/16/2015. Any input on that repair would be great. Thanks!