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I have a m923a2 the ctis was working. It started flashing all 5 lights. The left front tire is low. I hear some hissing from under the passenger dash area with the truck off I looked and couldnt find where though it is elusive. When I press the highway button you can hear a valve open and a little air flow. I pressurized the air system and did the tank drain procedure with the petcocks several times to make sure there wasnt any dirt or anything clogging up. Does anyone have any pointers for me?
Thanks,
Will
Thanks,
Will