97EB Suspension Problems

[Guest]

My 97 EB 4WD Expy has been great until now. After putting on 125,00 miles, the rear shocks are fully extended and the air pump short cycles quite frequently. The "suspension" light comes on after 5 or 6 minutes of driving. Also, the 4WD drive mode does not work in any position, AWD, Lo, Hi, etc.
I would appreciate any suggestions or tips.

Thanks