I think it’s really op LI, which according to the manual is open limit switch and it also said this is not owner serviceable. I would try turning it off for a while and then turn it back on to see if it will reset. Other than that, you might have to bring it in to have it checked.
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Bob & Becky
2012 3402RL
2012 Chevy 2500HD D/A CC 4WD
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