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
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Rear Shock Absorber Mount Replacement
Preliminary Procedures
1. Remove the rear tire and wheel assembly.
2. Shock Absorber Replacement (GNC)Shock Absorber Replacement (GNQ).
CAUTION: Refer to Fastener Caution.
Rear Shock Absorber NutTighten 20 N.m (15 lb ft)
Rear Suspension Mount Upper Cup
Rear Shock Absorber Mount
Rear Shock A
DTC B3920
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
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