Lube for Slide Mechanisms and Slide Sides
FYI.....an experienced tech whom I trust, told me to buy a $14 spray bottle of T-40 Lubricant/rustproofing from Crown Rustproofing and spray the large square tube extensions under the large slide on my Denali along with the threaded rod and back gears. T-40 is a colorless lubricant and rust inhibitor. I did mine and it stopped a lot of the cracking and creaking plus now they are rustproofed for a year. Did more parts with it also like the stairs, electric stabilizers etc... I would not recommend it for the Shwinnteck(spelling?) slides as it may attract some grit in the fine gears on the side of the slide and promote premature wear.
Also, to prevent your rubber seals from sticking and sliding smoothly, there is a "cheap miracle ingredient": Pledge Furniture Polish. Spray on the side of the slide (clean first), rub to a shine and your rubbers will slide beautifully (no KY required...LOL). Car wax works but will eventually build up and may even coat your slides with a white sticky gunk as it oxidises (Pledge removes the previous coat with each application). I tried Pledge and it works great.
Just thought I would pass on the info.
Be safe and have fun doing it!!!
2014 Denali 289RK - 2013 F-150 XTR, Ecoboost, SuperCab 6.5 foot box, 4x4, max tow pckg + Air Lift air bags