will 177.804 put my truck out of service
No. Across our inspection records, the out-of-service rate for 177.804 is 0.0%—none of the 3 all-time citations resulted in an out-of-service placement. This is significantly lower than the all-FMCSR average OOS rate of 31.4%, making this one of the least-likely hazmat violations to trigger an immediate roadside shutdown. That said, the citation itself still carries CSA weight and will appear on your record.