GM must have had a pile of GMT800 ISS’s sitting around and decided to use them up. Can’t believe this issue is reoccurring! WTF! Thanks for confirming and sharing your video. BTW, you didn’t mention this or show it in the video, but you need to be careful when removing the shaft so that the steering wheel does not spin freely. It could damage the airbag clock spring. I also noted this in the video comments.
EastCoast HD started following Help W/ relocating camera port from bumper to bed for 5th wheel,, Noisy steering column, Best MA GMC Dealership? and and 1 other
Ahhh yes! The infamous GMT800 I.S.S. (Intermediate Steering Shaft) issue. IIRC, first recall was to repack the spline with grease. That would tighten up the tolerance for a while and the knock would eventually return. Second recall was to replace the shaft with a revised part. When didn’t work, back to repacking with grease. The steering on my 2020 feels odd at times but overall performs well. I have the digital steering. Seems to have very, very light effort on center, possibly a quarter inch or so of play left and right off center, hard to tell. The odd part is that the truck tracks very well at all speeds. No wandering at all, tightens up nicely as speed increases. I have noticed a few instances of very slight knocking felt through the steering column. Approaching 1000 miles.
AT4 trim is a top seller right now. When I bought my Denali on 11/2, it had an additional $1000 rebate over the AT4. You are also going to be limited by current supply. Sellers market to some degree. I purchased from Robertson’s in Wareham. Been in business a long time. Family owned and operated. Exceptional buying experience from start to finish. Deal included my trade-in. No BS, straight forward deal. They honored the First Responder discount that I qualified for while others would not.
I have installed my below the rail box in my last three trucks using heavy duty zip ties........ Attach an anchor ring to each side of the tool box (be sure to check for interference inside the box) then simply zip tie to the lower load rings in the bed. I installed the anchor rings on the tool box 10-12" higher than but even with the lower bed rings so there is some downward force applied when cinching down the zip ties. Position the zip tie so that the locking tab passes through the lower bed ring from front to rear, keeping the tab close to the bed ring. This will provide a good mechanical advantage when tightening the tie. I have used one zip tie per side without issue. You can simply add an additional tie to each side for added safety. Parts were purchased at Lowe's
Nice truck and welcome to the forum You'll have better results getting answers to your questions by going to the topic specific sections. Try out the search feature, or scroll through the many pages. Chances are this topic has been discussed previously. Still cant find what your looking for, feel free to post a question, lots of help full peeps here. Here is a good place to start... http://www.gm-trucks.com/forums/forum/187-2014-2015-2016-silverado-sierra-accessories-modifications/
Be careful with a travel trailer having a "dry" weight of around 8900#. At that weight you may be exceeding your available payload and close to exceeding your hitch weight of 1200#. For example. I'm going to guess your truck has a payload of somewhere around 1500#, give or take a 100# or so. You can confirm this number by checking the yellow sticker inside your drivers door. GM recommends a hitch weight of 10-15% of total trailer weight so... 8900 X .13 = 1157 + 100# (WDH) = 1257 You will most likely add close to 1000# to the TT once you are ready to head down the road for a trip. 9900 X .13 = 1287 + 100# (WDH) = 1387
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