{"nhtsa_id":10005381,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2004-02-24","date":"2004-01-01","document_id":"01542","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:ENGINE","mfr_system":null,"summary":"VACUUM TYPE HISSING NOISE FROM ENGINE. THIS NOISE IS MORE NOTICEABLE WHEN THE VEHICLE IS PARKED IN AN ENCLOSED AREA WITH THE HOOD UP. 3.5 L52 ENGINE. SIT BULLETIN 1409740. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/10005381","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"COLORADO","year_from":2004,"year_to":2004,"match":"exact","vehicle_ids":["2004_chevrolet_colorado"]},{"make":"GMC","model":"CANYON","year_from":2004,"year_to":2004,"match":"exact","vehicle_ids":["2004_gmc_canyon"]}],"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":[]}