will 383.37(a) put my truck out of service
No. This citation does not result in out-of-service placement. Across our inspection database, 383.37(a) has never triggered an OOS order—the OOS rate is 0.0%. However, this violation carries an 8-point CSA severity weight, which can accumulate toward other enforcement actions. The fact that OOS placement is not automatic does not mean the citation is minor; it reflects that the violation is typically enforced against the carrier rather than the vehicle itself.