Sierra, Silverado 2006-2007

4.8L V8 VIN C Auto 7

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Trouble Code: P0882



Transmission Control Module (TCM) Power Input Signal Low

Possible Causes:



Inspect the wiring for poor electrical connections at the TCM. Inspect for the following conditions:

A bent terminal
 
A backed-out terminal
 
A damaged terminal
 
Poor terminal tension
 
A chafed wire
 
A broken wire inside the insulation
 

When diagnosing for an intermittent short or open, massage the wiring harness while watching the test equipment for a change.You may have to drive the vehicle in order to experience a condition.A defective vehicle battery may allow this DTC to set. Test the vehicle battery to verify proper voltage and load capacity.A defective vehicle charging system may cause this DTC to set.
 

Trouble Code: P0883



Transmission Control Module (TCM) Power Input Signal High

Possible Causes:



Inspect the wiring for poor electrical connections at the TCM. Inspect for the following conditions:

A bent terminal
 
A backed-out terminal
 
A damaged terminal
 
Poor terminal tension
 
A chafed wire
 
A broken wire inside the insulation
 

When diagnosing for an intermittent short or open, massage the wiring harness while watching the test equipment for a change.You may have to drive the vehicle in order to experience a condition.This DTC is normally set due to vehicle charging system concerns.
 

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: P0960



Pressure Control Solenoid (PCS) Main Modulation (MAIN MOD) Circuit Open

Possible Causes:



Inspect the wiring for poor electrical connections at the TCM. Inspect for the following conditions:

A bent terminal
 
A backed-out terminal
 
A damaged terminal
 
Poor terminal tension
 
A chafed wire
 
A broken wire inside the insulation
 

When diagnosing for an intermittent short or open, massage the wiring harness while watching the test equipment for a change.You may have to drive the vehicle in order to experience a condition.DTC P0960, set in combination with DTC P2727 and P2761, may indicate an open in the high side driver circuit.
 

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



Pressure Control Solenoid (PCS) Main Modulation (MAIN MOD) Circuit Low

Possible Causes:



Inspect the wiring for poor electrical connections at the TCM. Inspect for the following conditions:

A bent terminal
 
A backed-out terminal
 
A damaged terminal
 
Poor terminal tension
 
A chafed wire
 
A broken wire inside the insulation
 

When diagnosing for an intermittent short or open, massage the wiring harness while watching the test equipment for a change.You may have to drive the vehicle in order to experience a condition.
 

Trouble Code: P0963



Pressure Control Solenoid (PCS) Main Modulation (MAIN MOD) Circuit High

Possible Causes:



Inspect the wiring for poor electrical connections at the TCM. Inspect for the following conditions:

A bent terminal
 
A backed-out terminal
 
A damaged terminal
 
Poor terminal tension
 
A chafed wire
 
A broken wire inside the insulation
 

When diagnosing for an intermittent short or open, massage the wiring harness while watching the test equipment for a change.You may have to drive the vehicle in order to experience a condition.
 

Trouble Code: P0964



Pressure Control Solenoid 2 (PCS2) Control Circuit Open (B)

Possible Causes:



Inspect the wiring for poor electrical connections at the TCM. Inspect for the following conditions:

A bent terminal
 
A backed-out terminal
 
A damaged terminal
 
Poor terminal tension
 
A chafed wire
 
A broken wire inside the insulation
 

When diagnosing for an intermittent short or open, massage the wiring harness while watching the test equipment for a change.You may have to drive the vehicle in order to experience a condition.DTC P0964 set in combination with DTC P0972, P0975 and P0978 may indicate an open in the HSD2 circuit.
 

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



Pressure Control Solenoid 2 (PCS2) Control Circuit Low (B)

Possible Causes:



Inspect the wiring for poor electrical connections at the TCM. Inspect for the following conditions:

A bent terminal
 
A backed-out terminal
 
A damaged terminal
 
Poor terminal tension
 
A chafed wire
 
A broken wire inside the insulation
 

When diagnosing for an intermittent short or open, massage the wiring harness while watching the test equipment for a change.You may have to drive the vehicle in order to experience a condition.
 

Trouble Code: P0967



Pressure Control Solenoid 2 (PCS2) Control Circuit High (B)

Possible Causes:



Inspect the wiring for poor electrical connections at the TCM. Inspect for the following conditions:

A bent terminal
 
A backed-out terminal
 
A damaged terminal
 
Poor terminal tension
 
A chafed wire
 
A broken wire inside the insulation
 

When diagnosing for an intermittent short or open, massage the wiring harness while watching the test equipment for a change.You may have to drive the vehicle in order to experience a condition.
 

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: P0972



Shift Solenoid 1 (SS1) Control Circuit Open

Possible Causes:



Inspect the wiring for poor electrical connections at the TCM. Inspect for the following conditions:

A bent terminal
 
A backed-out terminal
 
A damaged terminal
 
Poor terminal tension
 
A chafed wire
 
A broken wire inside the insulation
 

When diagnosing for an intermittent short or open, massage the wiring harness while watching the test equipment for a change.You may have to drive the vehicle in order to experience a condition.DTC P0972, when set in combination with DTC P0964, P0975 and P0978, may indicate an open in the actuator supply voltage 2 circuit.
 

Trouble Code: P0973



Shift Solenoid 1 (SS1) Control Circuit Low

Possible Causes:



Inspect the wiring for poor electrical connections at the TCM. Inspect for the following conditions:

A bent terminal
 
A backed-out terminal
 
A damaged terminal
 
Poor terminal tension
 
A chafed wire
 
A broken wire inside the insulation
 

When diagnosing for an intermittent short or open, massage the wiring harness while watching the test equipment for a change.You may have to drive the vehicle in order to experience a condition.
 

Trouble Code: P0974



Shift Solenoid 1 (SS1) Control Circuit High

Possible Causes:



Inspect the wiring for poor electrical connections at the TCM. Inspect for the following conditions:

A bent terminal
 
A backed-out terminal
 
A damaged terminal
 
Poor terminal tension
 
A chafed wire
 
A broken wire inside the insulation
 

When diagnosing for an intermittent short or open, massage the wiring harness while watching the test equipment for a change.You may have to drive the vehicle in order to experience a condition.
 

Trouble Code: P0975



Shift Solenoid 2 (SS2) Control Circuit Open

Possible Causes:



Inspect the wiring for poor electrical connections at the TCM. Inspect for the following conditions:

A bent terminal
 
A backed-out terminal
 
A damaged terminal
 
Poor terminal tension
 
A chafed wire
 
A broken wire inside the insulation
 

When diagnosing for an intermittent short or open, massage the wiring harness while watching the test equipment for a change.You may have to drive the vehicle in order to experience a condition.DTC P0975, when set in combination with DTC P0964, P0972 and P0978, may indicate an open in the actuator supply voltage 2 circuit
 

Trouble Code: P0976



Shift Solenoid 2 (SS2) Control Circuit Low

Possible Causes:



Inspect the wiring for poor electrical connections at the TCM. Inspect for the following conditions:

A bent terminal
 
A backed-out terminal
 
A damaged terminal
 
Poor terminal tension
 
A chafed wire
 
A broken wire inside the insulation
 

When diagnosing for an intermittent short or open, massage the wiring harness while watching the test equipment for a change.You may have to drive the vehicle in order to experience a condition.
 

Trouble Code: P0977



Shift Solenoid 2 (SS2) Control Circuit High

Possible Causes:



Inspect the wiring for poor electrical connections at the TCM. Inspect for the following conditions:

A bent terminal
 
A backed-out terminal
 
A damaged terminal
 
Poor terminal tension
 
A chafed wire
 
A broken wire inside the insulation
 

When diagnosing for an intermittent short or open, massage the wiring harness while watching the test equipment for a change.You may have to drive the vehicle in order to experience a condition.
 

Trouble Code: P0978



Shift Solenoid 3 (SS3) Control Circuit Open

Possible Causes:



Inspect the wiring for poor electrical connections at the TCM. Inspect for the following conditions:

A bent terminal
 
A backed-out terminal
 
A damaged terminal
 
Poor terminal tension
 
A chafed wire
 
A broken wire inside the insulation
 

When diagnosing for an intermittent short or open, massage the wiring harness while watching the test equipment for a change.You may have to drive the vehicle in order to experience a condition.DTC P0978, when set in combination with DTC P0964, P0972 and P0975, may indicate an open in the actuator supply voltage 2 circuit.
 

Trouble Code: P0979



Shift Solenoid 3 (SS3) Control Circuit Low

Possible Causes:



Inspect the wiring for poor electrical connections at the TCM. Inspect for the following conditions:

A bent terminal
 
A backed-out terminal
 
A damaged terminal
 
Poor terminal tension
 
A chafed wire
 
A broken wire inside the insulation
 

When diagnosing for an intermittent short or open, massage the wiring harness while watching the test equipment for a change.You may have to drive the vehicle in order to experience a condition.
 

Trouble Code: P0980



Shift Solenoid 3 (SS3) Control Circuit High

Possible Causes:



Inspect the wiring for poor electrical connections at the TCM. Inspect for the following conditions:

A bent terminal
 
A backed-out terminal
 
A damaged terminal
 
Poor terminal tension
 
A chafed wire
 
A broken wire inside the insulation
 

When diagnosing for an intermittent short or open, massage the wiring harness while watching the test equipment for a change.You may have to drive the vehicle in order to experience a condition.
 

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: P0A01



Starter/Generator Control Module Coolant Temperature Sensor 1 Performance

Trouble Code: P0A02



Starter/Generator Control Module Coolant Temperature Sensor 1 Circuit Low Voltage

Trouble Code: P0A03



Starter/Generator Control Module Coolant Temperature Sensor 1 Circuit High Voltage

Trouble Code: P0A06



Battery Energy Control Module Read Only Memory (ROM)

Possible Causes:



If condition is not present, refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0A07



Battery Energy Control Module 5-Volt Reference Circuit

Possible Causes:



If condition is not present, refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0A1D



HCM System Fault

Trouble Code: P0A27



Hybrid Battery Pack Relay Feedback Circuit

Trouble Code: P0A3E



Starter/Generator Control Module Overtemperature

Possible Causes:



If there is a restriction of the air flow through the radiator this DTC may set. Ensure that the vehicle front end has at least 1.5 meters (5 feet) of clearance from obstructions to airflow if vehicle is parked.
 

Trouble Code: P0A7E



Hybrid Battery Pack Overtemperature

Trouble Code: P0A7F



Hybrid Battery Pack Life

Trouble Code: P0A82



Hybrid Battery Pack Cooling Fan Stuck OFF

Trouble Code: P0A83



Hybrid Battery Pack Cooling Fan Stuck ON

Trouble Code: P0A88



14-Volt Power Module Current Sensor Circuit Low Current

Trouble Code: P0A89



14-Volt Power Module Current Sensor Circuit High Current

Trouble Code: P0A8B



14-Volt Power Module System Voltage

 
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