will a 365.511 citation put my truck out of service
Not automatically. Across our inspection records, 365.511 citations resulted in an out-of-service order in 40.0% of cases—4 out of 10 total citations in our database. That's higher than the all-FMCSR average OOS rate of 31.4%, so this violation carries above-average risk of immediate removal from service. Whether you're actually placed OOS depends on the specific finding and the severity the inspector documents. Don't assume you're safe; prepare for the possibility.