{"nhtsa_id":617636,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2001-03-21","date":"2000-11-01","document_id":"99066C","mfr_campaign":null,"replaces":"99066B","component":"VEHICLE SPEED CONTROL:CRUISE CONTROL","mfr_system":null,"summary":"SOME OWNERS OF 1996 - 1999 S/T, M/L, C/K, G, P AND W4 TRUCKS MAY EXPERIENCE A SERVICE ENGINE SOON LIGHT, MISFIRE, ROUGH IDLE OR HARD START DUE TO A DEPOSIT BUILD-UP ON THE SEQUENTIAL CENTRAL PORT FUEL INJECTOR (SCPI) POPPET VALVE(S). *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/617636","components":[{"id":"speed-control","name":"Throttle and cruise control","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CADILLAC","model":"C/K SERIES","year_from":1999,"year_to":1999,"match":null,"vehicle_ids":[]},{"make":"CADILLAC","model":"CADILLAC TRUCK","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"C/K SERIES","year_from":1996,"year_to":1999,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"CHEVROLET TRUCK","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"G SERIES","year_from":1996,"year_to":1996,"match":"exact","vehicle_ids":["1996_chevrolet_g-series"]},{"make":"CHEVROLET","model":"G SERIES","year_from":1997,"year_to":1999,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"M/L","year_from":1997,"year_to":1999,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"M/L SERIES","year_from":1996,"year_to":1996,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"P SERIES","year_from":1996,"year_to":1999,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"S/T PICKUP","year_from":1999,"year_to":1999,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"S/T SERIES","year_from":1996,"year_to":1998,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"W4","year_from":1996,"year_to":1999,"match":"exact","vehicle_ids":["1996_chevrolet_w4","1997_chevrolet_w4","1998_chevrolet_w4","1999_chevrolet_w4"]},{"make":"GMC","model":"C/K SERIES","year_from":1996,"year_to":1999,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"G SERIES","year_from":1996,"year_to":1999,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"GMC TRUCK","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"M/L SERIES","year_from":1996,"year_to":1999,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"P SERIES","year_from":1996,"year_to":1999,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"S/T SERIES","year_from":1996,"year_to":1999,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"W4","year_from":1996,"year_to":1999,"match":"exact","vehicle_ids":["1996_gmc_w4","1997_gmc_w4","1998_gmc_w4","1999_gmc_w4"]},{"make":"OLDSMOBILE","model":"OLDSMOBILE TRUCK","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"OLDSMOBILE","model":"T SERIES","year_from":1996,"year_to":1998,"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":[]}