Escalade, Suburban 1500 & 2500, Tahoe, Yukon, Yukon XL 1500 & 2500 (2006-2007), Yukon Denali and Yukon Denali XL (2005-2006)

6.0L V8 VIN K Auto 5

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Trouble Code: P0756



Shift Solenoid (SS) 2 Valve Performance - Stuck Off

Possible Causes:



When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to assist in duplicating the failure conditions. Ensure the transmission fluid level is correct and there are no leaks.
 

Trouble Code: P0757



2-3 Shift Solenoid Valve Performance - No Third or Fourth Gear

Possible Causes:



Verify that the transmission meets the specifications in the Shift Speed table. Refer to Shift Speed .
 
Other internal transmission failures may cause incorrect gear ratios to occur in 3rd gear.
 
The customer may have concern of an engine over-rev condition or neutral condition in 4th gear. Refer to Shift Solenoid Valve State and Gear Ratio .
 
DTC P0757 defaults to an elevated line pressure condition which may result in partial TCC apply. This may produce an idle surge that could stall the engine.
 

Trouble Code: P0757



2-3 Shift Solenoid Valve Performance - No Third or Fourth Gear

Possible Causes:



Verify that the transmission meets the specifications in the Shift Speed .
 
Other internal transmission failures may cause more than one shift to occur.
 
Refer to the Shift Solenoid Valve State and Gear Ratio .
 

Trouble Code: P0758



2-3 Shift Solenoid Control Circuit

Possible Causes:



DTC P0758 defaults to an elevated line pressure condition which may result in partial TCC apply. This may produce an idle surge that could stall the engine. Refer to Shift Solenoid Valve State and Gear Ratio .
 

Trouble Code: P0758



2-3 Shift Solenoid Control Circuit

Possible Causes:



Refer to the Shift Solenoid Valve State and Gear Ratio .
 

Trouble Code: P0776



Clutch Pressure Control (PC) Solenoid 2 - Stuck Off

Possible Causes:



When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to assist in duplicating the failure conditions.
 
If diagnosing a P0776 DTC and you know the 3-5-R Clutch is not stuck ON, inspect for a sticking clutch select valve 2.
 

Trouble Code: P0777



Clutch Pressure Control (PC) Solenoid 2 - Stuck On

Possible Causes:



When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to assist in duplicating the failure conditions.
 
If diagnosing a P0776 DTC and you know the 3-5-R Clutch is not stuck ON, inspect for a sticking clutch select valve 2.
 

Trouble Code: P0785



3-2 Shift Solenoid (SS) Control Circuit

Trouble Code: P0796



Clutch Pressure Control (PC) Solenoid 3 - Stuck Off

Possible Causes:



When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to assist in duplicating the failure conditions.
 

Trouble Code: P0797



Clutch Pressure Control (PC) Solenoid 3 - Stuck On

Possible Causes:



When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to assist in duplicating the failure conditions.
 

Trouble Code: P0815



Upshift Switch Circuit

Trouble Code: P0816



Downshift Switch Circuit

Trouble Code: P0826



Up and Down Shift Switch Circuit

Trouble Code: P0842



Transmission Fluid Pressure (TFP) Switch 1 Circuit Low Voltage

Trouble Code: P0843



Transmission Fluid Pressure (TFP) Switch 1 Circuit High Voltage

Trouble Code: P0851



Park/Neutral Position (PNP) Switch Circuit Low Voltage

Possible Causes:



It is possible for this DTC to set due to a stack-up or misalignment issue between the IMS and the P/N Switch, where no electrical fault is present. Ensure the gear shift selector cable is properly adjusted and there are no service bulletins that address this concern before replacing parts.
 

Trouble Code: P0852



Park/Neutral Position (PNP) Switch Circuit High Voltage

Possible Causes:



It is possible for this DTC to set due to a stack-up or misalignment issue between the IMS and the P/N Switch, where no electrical fault is present. Ensure the gear shift selector cable is properly adjusted and there are no service bulletins that address this concern before replacing parts.
 

Trouble Code: P0856



Traction Control Torque Request Circuit

Possible Causes:

C0298 A requested torque signal malfunction is only one possible cause for the PCM to lose the ability to perform traction control. DTC C0298 may set due to engine overheating, throttle actuator control failure, loss of ignition timing control by the PCM, etc. If DTC P0856 has not set, refer to the following in order to identify other possible causes of DTC C0298:



Symptoms - Engine Controls for the 4.3L engine
 
Symptoms - Engine Controls for the 8.1L engine
 
Symptoms - Engine Controls for the 4.8L, 5.3L, and 6.0L engines
 
Symptoms - Engine Controls for the 6.6L (LBZ and LLY) engine
 



Testing for Electrical Intermittents
 
Testing for Intermittent Conditions and Poor Connections
 
Connector Repairs
 
Wiring Repairs
 

Trouble Code: P0872



Transmission Fluid Pressure (TFP) Switch 3 Circuit Low Voltage

Trouble Code: P0873



Transmission Fluid Pressure (TFP) Switch 3 Circuit High Voltage

Trouble Code: P0877



Transmission Fluid Pressure (TFP) Switch 4 Circuit Low Voltage

Trouble Code: P0878



Transmission Fluid Pressure (TFP) Switch 4 Circuit High Voltage

Trouble Code: P0894



Transmission Component Slipping

Possible Causes:



A TFP manual valve position switch malfunction can set DTC P0894.
 
A mechanical failure of the shift solenoids or TCC PWM solenoid valve can set DTC P0894.
 
Internal transmission failures can result in a DTC P0894.
 
Sticking or contaminated shift valves may cause intermittent slipping in D4.
 
DTC P0894 defaults to an elevated line pressure condition which may result in partial TCC apply. This may produce an idle surge that could stall the engine.
 

Trouble Code: P0894



Transmission Component Slipping

Possible Causes:



Bronze material found in the transmission oil pan may indicate stator shaft bushing wear. If bushing wear is suspected, inspect the stator shaft and the input, turbine, shaft for damage.
 
Refer to Symptoms - Automatic Transmission for more information.
 

Trouble Code: P0961



Line Pressure Control (PC) Solenoid System Performance

Possible Causes:



When attempting to set solenoid electrical DTCs, ensure the TCM is warmed up and the transmission is operated in 2nd gear long enough to ensure a 3°C (5°F) increase in TCM substrate temperature. This will place the TCM under the optimal conditions to test solenoid electrical DTCs.
 

Trouble Code: P0962



Line Pressure Control (PC) Solenoid Control Circuit Low Voltage

Possible Causes:



When attempting to set solenoid electrical DTCs, ensure the TCM is warmed up and the transmission is operated in 2nd gear long enough to ensure a 3°C (5°F) increase in TCM substrate temperature. This will place the TCM under the optimal conditions to test solenoid electrical DTCs.
 

Trouble Code: P0963



Line Pressure Control (PC) Solenoid Control Circuit High Voltage

Possible Causes:



When attempting to set solenoid electrical DTCs, ensure the TCM is warmed up and the transmission is operated in 2nd gear long enough to ensure a 3°C (5°F) increase in TCM substrate temperature. This will place the TCM under the optimal conditions to test solenoid electrical DTCs.
 

Trouble Code: P0965



Clutch Pressure Control (PC) Solenoid 2 System Performance

Possible Causes:



When attempting to set solenoid electrical DTCs, it may be helpful to ensure the TCM is warmed up and the transmission is operated in second gear long enough to ensure a 3°C (5°F) increase in TCM temperature. This will place the TCM under the optimal conditions to test solenoid electrical DTCs.
 

Trouble Code: P0966



Clutch Pressure Control (PC) Solenoid 2 Control Circuit Low Voltage

Possible Causes:



When attempting to set solenoid electrical DTCs, it may be helpful to ensure the TCM is warmed up and the transmission is operated in second gear long enough to ensure a 3°C (5°F) increase in TCM temperature. This will place the TCM under the optimal conditions to test solenoid electrical DTCs.
 

Trouble Code: P0967



Clutch Pressure Control (PC) Solenoid 2 Control Circuit High Voltage

Possible Causes:



When attempting to set solenoid electrical DTCs, it may be helpful to ensure the TCM is warmed up and the transmission is operated in second gear long enough to ensure a 3°C (5°F) increase in TCM temperature. This will place the TCM under the optimal conditions to test solenoid electrical DTCs.
 

Trouble Code: P0969



Clutch Pressure Control (PC) Solenoid 3 System Performance

Possible Causes:



When attempting to set solenoid electrical DTCs, ensure the TCM is warmed up and the transmission is operated in second gear long enough to ensure a 3°C (5°F) increase in TCM substrate temperature. This will place the TCM under the optimal conditions to test solenoid electrical DTCs.
 

Trouble Code: P0970



Clutch Pressure Control (PC) Solenoid 3 Control Circuit Low Voltage

Possible Causes:



When attempting to set solenoid electrical DTCs, ensure the TCM is warmed up and the transmission is operated in second gear long enough to ensure a 3°C (5°F) increase in TCM substrate temperature. This will place the TCM under the optimal conditions to test solenoid electrical DTCs.
 

Trouble Code: P0971



Clutch Pressure Control (PC) Solenoid 3 Control Circuit High Voltage

Possible Causes:



When attempting to set solenoid electrical DTCs, ensure the TCM is warmed up and the transmission is operated in second gear long enough to ensure a 3°C (5°F) increase in TCM substrate temperature. This will place the TCM under the optimal conditions to test solenoid electrical DTCs.
 

Trouble Code: P0973



Shift Solenoid (SS) 1 Control Circuit Low Voltage

Possible Causes:



When attempting to set solenoid electrical DTCs, ensure the control solenoid (w/body and TCM) valve assembly is warmed up and the transmission is operated in 2nd gear long enough to ensure a 3°C (5°F) increase in TCM temperature. This will place the TCM under the optimal conditions to test solenoid electrical DTCs.
 

Trouble Code: P0974



Shift Solenoid (SS) 1 Control Circuit High Voltage

Possible Causes:



When attempting to set solenoid electrical DTCs, ensure the control solenoid (w/body and TCM) valve assembly is warmed up and the transmission is operated in 2nd gear long enough to ensure a 3°C (5°F) increase in TCM temperature. This will place the TCM under the optimal conditions to test solenoid electrical DTCs.
 

Trouble Code: P0976



Shift Solenoid (SS) 2 Control Circuit Low Voltage

Possible Causes:



When attempting to set solenoid electrical DTCs, ensure the TCM is warmed up and the transmission is operated in 2nd gear long enough to ensure a 3°C (5°F) increase in TCM substrate temperature. This will place the TCM under the optimal conditions to test solenoid electrical DTCs.
 

Trouble Code: P0977



Shift Solenoid (SS) 2 Control Circuit High Voltage

Possible Causes:



When attempting to set solenoid electrical DTCs, ensure the TCM is warmed up and the transmission is operated in 2nd gear long enough to ensure a 3°C (5°F) increase in TCM substrate temperature. This will place the TCM under the optimal conditions to test solenoid electrical DTCs.
 

Trouble Code: P0989



Transmission Fluid Pressure (TFP) Switch 5 Circuit Low Voltage

Trouble Code: P0990



Transmission Fluid Pressure (TFP) Switch 5 Circuit High Voltage

Trouble Code: P1125



Accelerator Pedal Position (APP) System

 
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