Alto has introduced a series of filters for GM 6L series transmissions. They include:
- Alto #195940B: GM 6L80 filter (4.75-in. neck, 1.30-in. spacer) 2006-On
- Alto #195942: GM 6L50, 6L80, 6L90 filter (4.75-in. neck, 1.0-in. spacer) 2006-On
- Alto #195944: GM 6L80, 6L90 filter (6.32-in. tall, 1.00-in. spacer) 2009-2021