Buick Regal 2018-2026 Service Manual / Transmission / Transmission Cooling System / Diagnostic Information and Procedures
Buick Regal: Diagnostic Information and Procedures
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Transmission Overheats
TRANSMISSION FLUID COOLER FLOW TEST AND FLUSHING (6T50)
GM studies indicate that plugged or restricted transmission oil coolers and
pipes cause insufficient
transmission lubrication and elevated ope
Transmission Fluid Cooler Flow Test and Flushing (AF50-8)
Special Tools
DT - 45096 TransFlow Cooler Flush Machine
DT - 45096 - 30 TransFlow Adapter
For equivalent regional tools, refer to Special Tools.
GM studies indicate that plugged or restricted tra
SEE MORE:
DTC C0116
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diagnostic Procedure Instructions provides an overview of each
diagnostic category.
DTC Descriptors
D
Refrigerant Recovery and Recharging (R-1234yf)
Special Tools
GE-45037 A/C Oil Injector
GE-50078 Electronic Leak Detector
GE-50300 R-1234yf Air Conditioning Refrigerant Recovery/Recharge Cart
GE-50744 A/C R-1234yf PAG Oil Injector Hose
GE-50745 A/C R-1234yf POE Oil Injector Hose
GE-50957 Machine R-1234yf Contaminated Refrigerant
Equivalen
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