Ok I'm new here I've had my H2 for about two days now and love it. But today i got the service air suspension, truck does not sag at all ride seems normal and when I push the button in the back pump doesn't turn on? Thanks for your help

 

Mine does that all the time. It could be the inlet filter. I have read that if the compressor comes on and shuts off, then you get the Service Air Suspension warning. this is the common fix. I have not tried this yet getting to cold to work on it for me but maybe in the summer unless my air suspension completly fails.