{"nhtsa_id":620768,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2001-08-29","date":"2001-07-13","document_id":"SB210024","mfr_campaign":null,"replaces":"SB210024","component":"ENGINE AND ENGINE COOLING:COOLING SYSTEM","mfr_system":null,"summary":"SUBJECT REGARDING TEST STRIPS FOR TESTING GLYCOL, NITRITE AND PH LEVELS IN HEAVY-DUTY COOLANT. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/620768","components":[{"id":"engine","name":"Engine","parent":null},{"id":"cooling-system","name":"Cooling system","parent":"engine"}],"codes":[],"topics":[],"vehicles":[{"make":"MACK","model":"MACK","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}