I finally got around to changing the transmission fluid and filter on the 2005 Silverado. Not sure if it was ever done since I was the 2nd owner. After seeing the previous owner had the incorrect transfer case fluid in the truck, I made sure to change the transmission fluid as well to be safe. Truck has just over 90k on it, so it was due! Check out my video which shows how I dropped the transmission pan, and replace the filter, as well as flush out most of the old fluid. This should apply to most GM light trucks built from 1999-2005 with the 4L60e transmission.
Its a messy job, but if you follow my instructions, you can minimize the mess, and the frustration! I will list links to some of the things that made the job go easier here:
Finally, checkout my you tube video showing how I performed the transmission filter change and flush:Tags: 4l60e filter change, 4l60e fluid change, 4l60e flush, 4l60e service, GM transmission filter change, gm transmission flush, GM transmission service, sierra transmission filter change, sierra transmission fluid change, sierra transmission pan removal, Sierra Transmission service, silverado transmission filter change, silverado transmission fluid, silverado transmission fluid change, silverado transmission flush, silverado transmission service, transmission pan removal silverado