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

5.3L V8 VIN 3 Auto 4

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Trouble Code: P0668



Transmission Control Module (TCM) Temperature Sensor Circuit Low Voltage

Possible Causes:



Reprogram the TCM and retest the DTC to see if the DTC resets. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection before replacing the control solenoid (w/body and TCM) valve assembly.
 

Trouble Code: P0669



Transmission Control Module (TCM) Temperature Sensor Circuit High Voltage

Possible Causes:



Reprogram the TCM and retest the DTC to see if the DTC resets. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection before replacing the control solenoid (w/body and TCM) valve assembly.
 

Trouble Code: P0706



Transmission Range (TR) Switch Performance

Trouble Code: P0711



Transmission Fluid Temperature (TFT) Sensor Performance

Possible Causes:



DTC P0218 may set approximately 600 seconds (10 minutes) after DTC P0711 has set. Follow the diagnostic table for DTC P0711 before proceeding to the diagnostic table for DTC P0218.
 
DTC P0711 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: P0711



Transmission Fluid Temperature (TFT) Sensor Performance

Trouble Code: P0712



Transmission Fluid Temperature (TFT) Sensor Circuit Low Voltage

Possible Causes:



DTC P0712 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: P0712



Transmission Fluid Temperature (TFT) Sensor Circuit Low Voltage

Possible Causes:



The scan tool displays the transmission fluid temperature in degrees. After the transmission is operating, the fluid temperature should rise steadily to a normal operating temperature, then stabilize.
 
Verify the customer's driving habits, trailer towing, etc. Trailer towing should occur in D3.
 

Trouble Code: P0712



Transmission Fluid Temperature (TFT) Sensor Circuit Low Voltage

Trouble Code: P0713



Transmission Fluid Temperature (TFT) Sensor Circuit High Voltage

Possible Causes:



DTC P0713 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: P0713



Transmission Fluid Temperature (TFT) Sensor Circuit High Voltage

Trouble Code: P0716



Input Speed Sensor Performance

Possible Causes:



DTC P0716 defaults to an elevated line pressure condition which may result in partial torque converter clutch (TCC) apply. This may produce an idle surge that could stall the engine.
 

Trouble Code: P0716



Input Speed Sensor Performance

Possible Causes:



Inspect the ISS, harness, connector, and control solenoid (w/body and TCM) valve assembly pins for metallic debris and the 1-2-3-4 and 3-5-R clutch housing machined teeth surface for damage or misalignment. Proper torque of the OSS mounting bolt is critical to proper OSS operation. Use the J 35616 GM-approved terminal test kit for any test that requires probing the control solenoid (w/body and TCM) valve assembly harness connector or a component harness connector.
 

Trouble Code: P0717



Input Speed Sensor Circuit Low Voltage

Possible Causes:



DTC P0717 defaults to an elevated line pressure condition which may result in partial torque converter clutch (TCC) apply. This may produce an idle surge that could stall the engine.
 

Trouble Code: P0717



Input Speed Sensor Circuit Low Voltage

Possible Causes:



Inspect the ISS, harness, connector, and control solenoid (w/body and TCM) valve assembly pins for metallic debris and the 1-2-3-4 and 3-5-R clutch housing machined teeth surface for damage or misalignment. Proper torque of the OSS mounting bolt is critical to proper OSS operation. Use the J 35616 GM-approved terminal test kit for any test that requires probing the control solenoid (w/body and TCM) valve assembly harness connector or a component harness connector.
 

Trouble Code: P0719



Brake Switch Circuit Low Voltage

Possible Causes:



Inspect the brake switch for proper mounting and operation.
 

Trouble Code: P0719



TCC Brake Switch Circuit Low Voltage

Possible Causes:



Inspect the TCC brake switch for proper mounting and operation.
 
Inspect for ABS DTCs. A faulty ABS condition may contribute to setting DTC P0719.
 

Trouble Code: P0722



Output Speed Sensor (OSS) Circuit Low Voltage

Possible Causes:



Inspect the OSS, harness, connector and control solenoid (w/body and TCM) valve assembly pins for metallic debris and output shaft machined face for damage or misalignment. Proper torque of the OSS mounting bolt is critical to proper OSS operation. Use the J 35616 GM-approved terminal test kit for any test that requires probing the control solenoid (w/body and TCM) valve assembly harness connector or a component harness connector.
 

Trouble Code: P0723



Output Speed Sensor (OSS) Intermittent

Possible Causes:



Inspect the OSS, harness, connector and control solenoid (w/body and TCM) valve assembly pins for metallic debris and output shaft machined face for damage or misalignment. Proper torque of the OSS mounting bolt is critical to proper OSS operation. Use the J 35616 GM-approved terminal test kit for any test that requires probing the control solenoid (w/body and TCM) valve assembly harness connector or a component harness connector.
 

Trouble Code: P0724



Brake Switch Circuit High Voltage

Possible Causes:



Inspect the brake switch for proper mounting and operation.
 

Trouble Code: P0724



TCC Brake Switch Circuit High Voltage

Possible Causes:



Inspect the TCC brake switch for proper mounting and operation.
 
Inspect for ABS DTCs. A faulty ABS condition may contribute to setting DTC P0724.
 

Trouble Code: P0730



Incorrect Gear Ratio

Possible Causes:



A false or incorrect AT OSS or AT ISS signal can set DTC P0730.
 
DTC P0894 detects an incorrect gear ratio in fourth gear with the torque converter clutch (TCC) applied.
 
Inspect for any improperly installed aftermarket equipment.
 
Sticking or contamination of shift valves may cause intermittent incorrect gear ratios.
 
Refer to Shift Solenoid Valve State and Gear Ratio .
 
DTC P0730 defaults to an elevated line pressure which may result in partial TCC apply. This may produce an idle surge that could stall the engine.
 

Trouble Code: P0740



Torque Converter Clutch (TCC) Enable Solenoid Control Circuit

Possible Causes:



With the TCC engaged, the TCC slip speed should be -20 to +50 RPM.
 

Trouble Code: P0741



Torque Converter Clutch (TCC) System - Stuck Off

Possible Causes:



Residue or contamination may cause TCC hydraulic valves to stick intermittently.
 
DTC P0741 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: P0741



Torque Converter Clutch (TCC) System - Stuck Off

Possible Causes:



Contamination may cause the TCC apply valve to stick in the valve body.
 
There may be internal damage in the torque converter causing the no TCC apply.
 

Trouble Code: P0741



Torque Converter Clutch (TCC) - Stuck Off

Possible Causes:



When attempting to set transmission performance DTCs, it may be helpful to 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: P0742



Torque Converter Clutch (TCC) System - Stuck On

Possible Causes:



If the TCC is mechanically stuck ON with the parking brake applied and any gear range selected, the TCC fluid mechanically applies the TCC. TCC fluid mechanically applying the TCC can cause an engine stall.
 
DTC P0742 defaults to an elevated line pressure which may result in partial TCC apply. This may produce an idle surge that could stall the engine.
 
A stuck throttle position sensor may set a DTC P0742.
 

Trouble Code: P0742



Torque Converter Clutch (TCC) System - Stuck On

Possible Causes:

The TCC fluid hydraulically applies the TCC, possibly causing an engine stall, under the following conditions:



The TCC is hydraulically stuck ON
 
The parking brake is applied
 
Any gear range is selected
 

Trouble Code: P0742



Torque Converter Clutch (TCC) - Stuck On

Possible Causes:



When attempting to set transmission performance DTCs, it may be helpful to 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: P0748



Pressure Control (PC) Solenoid Control Circuit

Possible Causes:



Inspect the PC solenoid wiring for aftermarket products designed to alter transmission line pressure.
 
DTC P0748 defaults to an elevated line pressure condition which may result in partial torque converter clutch (TCC) apply. This may produce an idle surge that could stall the engine.
 

Trouble Code: P0748



Pressure Control (PC) Solenoid Control Circuit

Possible Causes:



DTC P0748 may set under low voltage conditions caused by high electrical system demands.
 

Trouble Code: P0751



1-2 Shift Solenoid Valve Performance - No First 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. Refer to Shift Solenoid Valve State and Gear Ratio .
 
DTC P0751 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: P0751



1-2 Shift Solenoid Valve Performance - No First 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: P0751



Shift Solenoid (SS) 1 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: P0752



1-2 Shift Solenoid Valve Performance - No Second or Third 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. Refer to Shift Solenoid Valve State and Gear Ratio .
 
DTC P0752 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: P0752



1-2 Shift Solenoid Valve Performance - No Second or Third 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: P0752



Shift Solenoid (SS) 1 Valve Performance - 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. Ensure the transmission fluid level is correct and there are no leaks.
 

Trouble Code: P0753



1-2 Shift Solenoid Control Circuit

Possible Causes:



An open ignition feed on the Off/Run/Crank voltage circuit can cause multiple DTCs to set. Refer to Shift Solenoid Valve State and Gear Ratio .
 
DTC P0753 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: P0753



1-2 Shift Solenoid Control Circuit

Possible Causes:



Refer to the Shift Solenoid Valve State and Gear Ratio .
 

Trouble Code: P0756



2-3 Shift Solenoid Valve Performance - No First or Second 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.
 
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 P0756 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: P0756



2-3 Shift Solenoid Valve Performance - No First or Second 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 .
 

 
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