I’m pretty sure the Alpine 3661 has hydraulic slides, and the clicking noise you are hearing is very likely the solenoid for the hydraulic motor as it tries to engage, but a low voltage is causing it to have issues. I know my Avalanche has had similar issues when I let the battery get too low. The cure? CHARGE YOUR RV BATTERIES and make sure you have a good set of batteries.
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2017 Avalanche 320RS 5'er
2022 Ford F-350 Lariat Ultimate with 6.7L Diesel
Andersen Ultimate 5th Wheel hitch
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