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Service bulletins for the 2019 Cadillac XT4

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.

832 on file from NHTSA, as of 2026-10-19.

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Only bulletins with component: Transmission and driveline are shown. Show all

Bulletins, newest first
16NA3382019-11-25. Service bulletin. POWER TRAIN. This Bulletin provides guidelines for Dealers Not Required and for Dealers Required to Contact the PQC for engine or transmission assembly replacement and explains the PQC process, GWM Transaction submission, vehicle service record retention and proper handling of assembly returns.
080730026F2019-09-23. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. This informational bulletin provides information on Some vehicles may rock or move slightly forward or rearward while in Park at start up after cold soak. This condition may be accompanied by a clunk noise. This is a slight movement that is more often seen visually, rather than felt, when viewed from the outside and using the auto-start feature, if equipped.
18NA3782019-09-23. Service bulletin. POWER TRAIN. This technical bulletin provides a procedure to replace the fluid cooler exchanger and the torque converter or transmission and torque converter, depending on if the exchanger leaked into the transmission fluid.
PIP5645B2019-08-12. Service bulletin. POWER TRAIN. This Preliminary information communicates that the transmission assembly, the torque converter assembly, and the Stack Plate Heat Exchanger (Automatic Transmission Fluid Cooler Exchanger) restriction has ended.
16NA3382019-07-29. Service bulletin. POWER TRAIN. This Bulletin provides guidelines for Dealers Not Required and for Dealers Required to Contact the PQC for engine or transmission assembly replacement and explains the PQC process, GWM Transaction submission, vehicle service record retention and proper handling of assembly returns.
080730035D2019-07-01. Service bulletin. POWER TRAIN. This bulletin provides information on the harmful effects of water or ethylene glycol in transmission fluid.
18NA3782019-07-01. Service bulletin. POWER TRAIN; ENGINE. This technical bulletin provides a procedure to replace the fluid cooler exchanger and the torque converter or transmission and torque converter, depending on if the exchanger leaked into the transmission fluid.
PIP5645A2019-06-10. Service bulletin. POWER TRAIN. This Preliminary information communicates that the transmission assembly, the torque converter assembly, and the Stack Plate Heat Exchanger (Automatic Transmission Fluid Cooler Exchanger) will be on restriction for engineering review.
PIP56452019-06-10. Service bulletin. POWER TRAIN. This Preliminary information communicates that the transmission assembly, the torque converter assembly, and the Stack Plate Heat Exchanger (Automatic Transmission Fluid Cooler Exchanger) will be on restriction for engineering review.
N182205680 012019-05-13. Service bulletin. POWER TRAIN. N182205680-01 - Service Update, Revised Parts, Service Procedure and Warranty Information. Certain vehicles may have been manufactured with a stacked plate heat exchanger (SPHE) that has the potential to develop a leak. A leaking SPHE can contaminate the automatic transmission fluid with engine coolant, resulting in poor transmission shift quality like shudder, hard shifts, vibration, or surging that typically will not provide malfunction indication (no DTCs set).Dealers are to replace the stacked plate heat exchanger.
N1822000802019-05-13. Service bulletin. POWER TRAIN. N182200080 - Service Update. Certain vehicles may have a condition in which the selectable one-way clutch is not released or is stuck on. The vehicle may have a hesitation or decreased acceleration, the Check Engine Light may appear and DTC P2731 may also set. Dealers will reprogram the transmission control module.
N1822056802019-05-13. Service bulletin. POWER TRAIN. N182205680 - Service Update. Certain vehicles may have been manufactured with a stacked plate heat exchanger (SPHE) that has the potential to develop a leak. A leaking SPHE can contaminate the automatic transmission fluid with engine coolant, resulting in poor transmission shift quality like shudder, hard shifts, vibration, or surging that typically will not provide malfunction indication (no DTCs set).Dealers are to replace the stacked plate heat exchanger.
18NA3792019-04-22. Service bulletin. POWER TRAIN. This technical bulletin provides a procedure to program the TCM to correct the customers concern of a MIL Illuminated, Vehicle wont go above 25 mph and/or 1-2 Shifts feel like a momentary tie up.
18NA3782019-04-22. Service bulletin. POWER TRAIN. This technical bulletin provides a procedure to replace the fluid cooler exchanger and the torque converter or transmission and torque converter, depending on if the exchanger leaked into the transmission fluid.
18NA3782019-04-15. Service bulletin. POWER TRAIN. This technical bulletin provides a procedure to replace the fluid cooler exchanger and the torque converter or transmission and torque converter, depending on if the exchanger leaked into the transmission fluid.
18NA3782019-04-08. Service bulletin. POWER TRAIN; ENGINE. This technical bulletin provides a procedure to replace the fluid cooler exchanger and the torque converter or transmission and torque converter, depending on if the exchanger leaked into the transmission fluid.
18NA3782019-04-01. Service bulletin. POWER TRAIN. This technical bulletin provides a procedure to replace the fluid cooler exchanger and the torque converter or transmission and torque converter, depending on if the exchanger leaked into the transmission fluid.
18NA3792019-03-25. Service bulletin. POWER TRAIN; ENGINE. This technical bulletin provides a procedure to program the TCM to correct the customers concern of a MIL Illuminated, Vehicle wont go above 25 mph and/or 1-2 Shifts feel like a momentary tie up.
18NA3782019-03-25. Service bulletin. ENGINE AND ENGINE COOLING; POWER TRAIN. This technical bulletin provides a procedure to replace the fluid cooler exchanger and the torque converter or transmission and torque converter, depending on if the exchanger leaked into the transmission fluid.
17NA0662019-03-25. Service bulletin. POWER TRAIN; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This warranty administration bulletin provide policy information for automatic transmission Oil Cooler Flush and flow test.
16NA3382019-03-18. Service bulletin. POWER TRAIN. This Bulletin provides guidelines for Dealers Not Required and for Dealers Required to Contact the PQC for engine or transmission assembly replacement and explains the PQC process, GWM Transaction submission, vehicle service record retention and proper handling of assembly returns.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.