Have had the suspension, and the flashing low gear dash lights on for some time. Also, the trans shifts sticky 2-3,(I suspect stuck shift solenoid). Have checked the TCCM, it looks good, no corrosion, both on the connectors, and opened it up, clean on the inside.
Have replaced the brake switch.
Am getting no codes!!

The raise lower switch doesn't work while driving(vehicle will raise on its own when running and in park!, and then won't lower), niether does the low/high switch, and this switch is flashing.
When attempt to engage the special programs, get "unavalaible"...followed by "Special programs off" dash messages.

Any ideas? Sounds like the TCCM, is there a way to test it? Do have the Gap tool.

Thanks in advance....

 

I'd guess it's the console terrain response switch panel as the culprit. Probably has liquid corrosion on the contacts inside. Fairly common issue.