{"nhtsa_id":10030732,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2009-11-24","date":"2009-05-01","document_id":"PIT-4865","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE)","mfr_system":null,"summary":"GMC/CHEVROLET: THE SPEEDOMETER BEING INOPERATIVE AND/OR THE SES MIL ON. WHEN CHECKING FOR DTCS THE ECM WILL HAVE A P0502 OR P0500 SET. THIS ISSUE MAY BE INTERMITTENT AND FOLLOWING NORMAL DIAGNOSITC IN SI2000 MAY NOT LEAD TO A CORRECTION. THIS CONCERN COULD BE CAUSED BY THE TCCM (TRANSFER CASE CONTROL MODULE) NOT COMMUNICATING ON THE CLASS 2 BUSS. THE 4WD SYSTEM MAY WORK NORMAL, BUT WHEN USING THE TECH 2 TO COMMUNICATE WITH THE TCCM IT WILL NOT COMMUNICATE. C4500-C5500 SERIES. *PE","document":null,"url":"https://open.wenmarpro.com/bulletins/10030732","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"transfer-case","name":"Transfer case","parent":"powertrain"}],"codes":["P0500","P0502"],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"KODIAK","year_from":2006,"year_to":2009,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"TOPKICK","year_from":2005,"year_to":2009,"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":[]}