{"nhtsa_id":10095974,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2017-03-20","date":"2016-02-26","document_id":"PIP5189A","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR","mfr_system":null,"summary":"THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN ABOUT VEHICLE THAT MAY HAVE BLACK SMOKE ON A COLD START. A DUAL-PULSE INJECTION STRATEGY IS UTILIZED DURING ENGINE COLD START TO REDUCE THE TIME REQUIRED TO BRING THE CATALYTIC CONVERTER UP TO OPERATING TEMPERATURE. THIS SPLIT INJECTION STRATEGY LASTS FOR ABOUT 60 SECONDS ON COLD START. THIS PROCESS MAY CAUSE THE CUSTOMER TO SEE INCREASED BLACK SMOKE DURING COLD START AND SHOULD BE CONSIDERED NORMAL.","document":null,"url":"https://open.wenmarpro.com/bulletins/10095974","components":[{"id":"engine","name":"Engine","parent":null},{"id":"exhaust-emissions","name":"Exhaust and emissions","parent":null},{"id":"catalytic-converter","name":"Catalytic converter","parent":"exhaust-emissions"}],"codes":[],"topics":[],"vehicles":[{"make":"CADILLAC","model":"ESCALADE","year_from":2015,"year_to":2016,"match":"exact","vehicle_ids":["2015_cadillac_escalade","2016_cadillac_escalade"]},{"make":"CADILLAC","model":"ESCALADE ESV","year_from":2015,"year_to":2016,"match":"base","vehicle_ids":["2015_cadillac_escalade","2016_cadillac_escalade"]},{"make":"CHEVROLET","model":"CORVETTE","year_from":2015,"year_to":2016,"match":"exact","vehicle_ids":["2015_chevrolet_corvette","2016_chevrolet_corvette"]},{"make":"CHEVROLET","model":"SILVERADO","year_from":2015,"year_to":2016,"match":"exact","vehicle_ids":["2015_chevrolet_silverado","2016_chevrolet_silverado"]},{"make":"CHEVROLET","model":"SILVERADO 1500","year_from":2014,"year_to":2014,"match":"base","vehicle_ids":["2014_chevrolet_silverado"]},{"make":"CHEVROLET","model":"SILVERADO 2500","year_from":2014,"year_to":2014,"match":"base","vehicle_ids":["2014_chevrolet_silverado"]},{"make":"CHEVROLET","model":"SILVERADO 3500","year_from":2014,"year_to":2014,"match":"base","vehicle_ids":["2014_chevrolet_silverado"]},{"make":"CHEVROLET","model":"SUBURBAN","year_from":2015,"year_to":2016,"match":"exact","vehicle_ids":["2015_chevrolet_suburban","2016_chevrolet_suburban"]},{"make":"CHEVROLET","model":"TAHOE","year_from":2015,"year_to":2016,"match":"exact","vehicle_ids":["2015_chevrolet_tahoe","2016_chevrolet_tahoe"]},{"make":"GMC","model":"SIERRA","year_from":2015,"year_to":2016,"match":"exact","vehicle_ids":["2015_gmc_sierra","2016_gmc_sierra"]},{"make":"GMC","model":"SIERRA 1500","year_from":2014,"year_to":2014,"match":"base","vehicle_ids":["2014_gmc_sierra"]},{"make":"GMC","model":"SIERRA 2500","year_from":2014,"year_to":2014,"match":"base","vehicle_ids":["2014_gmc_sierra"]},{"make":"GMC","model":"SIERRA 3500","year_from":2014,"year_to":2014,"match":"base","vehicle_ids":["2014_gmc_sierra"]},{"make":"GMC","model":"YUKON","year_from":2015,"year_to":2016,"match":"exact","vehicle_ids":["2015_gmc_yukon","2016_gmc_yukon"]},{"make":"GMC","model":"YUKON XL","year_from":2015,"year_to":2016,"match":"exact","vehicle_ids":["2015_gmc_yukon-xl","2016_gmc_yukon-xl"]}],"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":[]}