SamSin

I am using 0-20 what is the recommended weight. Mobil1

Well as much as I love my Sierra, I had a #7 lifter collapse on my 5.3L direct injection at almost 99,000 miles due to carbon buildup, the cam also had some damage. I had a low mileage (45,000) engine installed from another vehicle. Three year warranty on labor and the motor if it fails before that. The engine was flushed and cleaned, I was told that it should be flushed at least once a year and to use high octane to prevent or lessen carbon buildup. I installed an AFM disabler a K-Motor catch can to possibly help prevent or at least help get some more longevity out of the engine. It just aggravates me that I routinely maintain my Sierra and still had this happen, the truck is almost like new. It is a shame, otherwise the truck is awesome. Has anyone noticed if their engine has had a longer life with the catch can once it was installed? I'm not sure if it will help, but at this point I figure it can't hurt.

I'm a little late to this, but when changing the cabin filter, slide a thin piece of plastic or index paper under the cabin filter before removing it. Hold the plastic or paper in place as you pull out the filter. It will prevent any debris from falling into the fan. The fan located directly under the filter is in an awkward position and should anything fall it is almost impossible to remove without added and unwanted work. I almost learned the hard way when a leaf unknowingly fell into the fan. When I put on the AC, I heard a thumping sound as the fan blade hit the leaf. I went back and removed the cabin filter and after scraping my knuckles reaching down to the fan, with luck I was able to remove the leaf.