# Service bulletin 18169 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. - Type: Service bulletin - NHTSA id: 10143730 - Published by NHTSA: 2018\-08\-20 - Manufacturer's number: 18169 - Manufacturer's date: 2018\-05\-18 - NHTSA component: POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION ## NHTSA's summary 18169 \- Service Update.\- Certain vehicles equipped with a 10\-speed automatic transmission \(RPO MF6\), and a 6.2L engine \(RPO L86\) may experience a 2 to 3 second delayed engagement when shifting between park, reverse, or drive \(performing garage shifts\). Customers may also experience a hard shift, with a possible bang or clunk. If the vehicle is on an incline the customer may experience a short roll back due to the hesitation. Dealers are to reprogram the transmission control module \(TCM\) with an updated calibration. ## The document - [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2018/MC-10143730-9999.pdf) - [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2018/MC-10143730-0001.pdf) The document is the manufacturer's. This site does not hold it. ## Components Transmission and driveline, Automatic transmission ## Vehicles listed - 2018 CADILLAC ESCALADE - 2018 CHEVROLET TAHOE - 2018 GMC YUKON - 2018 GMC YUKON DENALI - 2018 GMC YUKON DENALI XL - 2018 GMC YUKON XL ## Other bulletins for the same vehicles and component - [17\-NA\-066](/bulletins/10239647.md), 2023-07-25, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION; POWER TRAIN. This service bulletin provides information for automatic transmission Oil Cooler Flush and flow test. - [16\-NA\-130](/bulletins/10232711.md), 2023-03-08, Service bulletin: POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT:VALVES/VALVE BODY. This service bulletin provides information for after installation of a replacement upper valve body, the transmission may have no Reverse and no 2nd gear. - [PIP5621C](/bulletins/10224285.md), 2022-10-17, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); POWER TRAIN. This Preliminary information communicates to the dealer technician that TAC recommends the utilization of the GDS2 software to aid in diagnosing automatic transmission concerns. TAC is requesting the GDS2 session logs be sent in before the dealer contacts TAC. - [21NA199](/bulletins/10207911.md), 2022-02-14, Service bulletin: POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT:VALVES/VALVE BODY. This informational bulletin advises the technician to replace the TBV if the transmission has any type of repair even if no problem was found, to replace the tbv. - [990420002L](/bulletins/10200154.md), 2021-08-09, Service bulletin: POWER TRAIN:MANUAL TRANSMISSION; POWER TRAIN:AUTOMATIC TRANSMISSION; EQUIPMENT. This service bulletin provides information on Driveline Clunk Noise and what is acceptable and what is considered normal operation. - [150089004C](/bulletins/10188403.md), 2021-03-08, Service bulletin: SUSPENSION:FRONT:MACPHERSON STRUT; SUSPENSION:FRONT:SHOCK ABSORBER; POWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT. This service bulletin provides technicians with updated information to help identify the differences between what is considered a fluid leak, and what is considered fluid seepage. - [20NA142](/bulletins/10187759.md), 2021-03-01, Service bulletin: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL; POWER TRAIN:AUTOMATIC TRANSMISSION:TORQUE CONVERTER. This Technical bulletin provides a repair to correct a condition of Shudder/Surging While Driving. - [19NA153](/bulletins/10186070.md), 2021-02-01, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:TORQUE CONVERTER. This technical bulletin provides a procedure to replace the torque converter and inspect the front pump and the TEHCM for metal. - [060089031F](/bulletins/10184501.md), 2020-12-21, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION; ENGINE. This service bulletin provides information on OEM and Remanufactured Engine and Automatic Transmission/Transaxle Identification. - [20NA212](/bulletins/10184494.md), 2020-12-21, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION; SUSPENSION; ELECTRICAL SYSTEM; ENGINE. This technical bulletin provides repair information to correct a customer concern of IPC Gauges Inoperative or Fluctuate, No Crank, Start then Stall. JSON: [/v1/bulletins/10143730](/v1/bulletins/10143730) [Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%2018169&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10143730&vehicle=Service%20bulletin%2018169)