Sierra, Silverado 2006-2007

6.6L V8 VIN 2 Std 3

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Trouble Code: P0571



Cruise Control Brake Switch Circuit

Possible Causes:



Refer to Exterior Lighting Systems Description and Operation , in order to avoid a misdiagnosis.
 
For an intermittent, refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0601



Control Module Random Access Memory (RAM) Failure (6L50/6L80/6L90)

Trouble Code: P0602



Control Module Not Programmed

Trouble Code: P0603



Control Module Random Access Memory (RAM) Failure (6L50/6L80/6L90)

Trouble Code: P0604



Control Module Random Access Memory (RAM) Failure

Trouble Code: P0605



Control Module Programming Read Only Memory

Trouble Code: P0606



Control Module Internal Performance

Trouble Code: P0607



Control Module Performance

Trouble Code: P0608



Vehicle Speed Output Circuit

Possible Causes:



Important: Remove any debris from the PCM connector surfaces before servicing the PCM. Inspect the PCM connector gaskets when diagnosing/replacing the PCM. Ensure that the gaskets are installed correctly. The gaskets prevent water intrusion into the PCM. Using Freeze Frame and/or Failure Records data may aid in locating an intermittent condition. If you cannot duplicate the DTC, the information included in the Freeze Frame and/or Failure Records data can aid in determining how many miles since the DTC set. The Fail Counter and Pass Counter can also aid determining how many ignition cycles the diagnostic reported a pass and/or a fail. Operate the vehicle within the same freeze frame conditions (RPM, load, vehicle speed, temperature etc.) that you observed. This will isolate when the DTC failed. For an intermittent, refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P060B



Control Module Analog to Digital Performance

Trouble Code: P061C



Control Module Engine Speed Performance

Trouble Code: P062C



Control Module Vehicle Speed Performance

Trouble Code: P062F



Control Module Long Term Memory Performance

Trouble Code: P0642



5-Volt Reference 1 Circuit Low Voltage

Trouble Code: P0643



5-Volt Reference 1 Circuit High Voltage

Trouble Code: P0646



Air Conditioning (A/C) Clutch Relay Control Circuit Low Voltage

Trouble Code: P0647



Air Conditioning (A/C) Clutch Relay Control Circuit High Voltage

Trouble Code: P064C



Glow Plug Module Control Performance

Trouble Code: P0650



Malfunction Indicator Lamp (MIL) Control Circuit

Possible Causes:



An intermittent or poor connection at the MIL control circuit in the inline harness connector may cause this DTC to set. Inspect the connector terminals for any condition that may result in excessive resistance. Refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0652



5 Volt Reference 2 Circuit Low Voltage

Trouble Code: P0653



5 Volt Reference 2 Circuit High Voltage

Trouble Code: P0654



Engine Speed Output Circuit

Possible Causes:



Important: Remove any debris from the PCM connector surfaces before servicing the PCM. Inspect the PCM connector gaskets when diagnosing/replacing the PCM. Ensure that the gaskets are installed correctly. The gaskets prevent water intrusion into the PCM. Using Freeze Frame and/or Failure Records data may aid in locating an intermittent condition. If you cannot duplicate the DTC, the information included in the Freeze Frame and/or Failure Records data can aid in determining how many miles since the DTC set. The Fail Counter and Pass Counter can also aid determining how many ignition cycles the diagnostic reported a pass and/or a fail. Operate the vehicle within the same freeze frame conditions (RPM, load, vehicle speed, temperature, etc.) that you observed. This will isolate when the DTC failed. For an intermittent, refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0671



Cylinder #1 Glow Plug Control Circuit

Possible Causes:



If the battery is connected with the ignition ON, the glow plugs could be damaged without finding any circuit fault.
 

Trouble Code: P0672



Cylinder #2 Glow Plug Control Circuit

Possible Causes:



If the battery is connected with the ignition ON, the glow plugs could be damaged without finding any circuit fault.
 

Trouble Code: P0673



Cylinder #3 Glow Plug Control Circuit

Possible Causes:



If the battery is connected with the ignition ON, the glow plugs could be damaged without finding any circuit fault.
 

Trouble Code: P0674



Cylinder #4 Glow Plug Control Circuit

Possible Causes:



If the battery is connected with the ignition ON, the glow plugs could be damaged without finding any circuit fault.
 

Trouble Code: P0675



Cylinder #5 Glow Plug Control Circuit

Possible Causes:



If the battery is connected with the ignition ON, the glow plugs could be damaged without finding any circuit fault.
 

Trouble Code: P0676



Cylinder #6 Glow Plug Control Circuit

Possible Causes:



If the battery is connected with the ignition ON, the glow plugs could be damaged without finding any circuit fault.
 

Trouble Code: P0677



Cylinder #7 Glow Plug Control Circuit

Possible Causes:



If the battery is connected with the ignition ON, the glow plugs could be damaged without finding any circuit fault.
 

Trouble Code: P0678



Cylinder #8 Glow Plug Control Circuit

Possible Causes:



If the battery is connected with the ignition ON, the glow plugs could be damaged without finding any circuit fault.
 

Trouble Code: P0698



5-Volt Reference 3 Circuit Low Voltage

Trouble Code: P0699



5-Volt Reference 3 Circuit High Voltage

Trouble Code: P0700



Transmission Control Module (TCM) Requested MIL Illumination

Trouble Code: P0833



Clutch Pedal Switch 2 Circuit

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: P0A0A



High Voltage System Interlock Circuit

Possible Causes:



Ensure that all connectors are connected properly.
 

Trouble Code: P1121



Throttle Position (TP) Sensor Circuit Intermittent High Voltage

Trouble Code: P1122



Throttle Position (TP) Sensor Circuit Intermittent Low Voltage

Trouble Code: P1574



Stoplamp Switch Circuit

Possible Causes:



Refer to Exterior Lighting Systems Description and Operation in order to avoid a misdiagnosis.
 
For an intermittent condition, refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P160C



Engine Calibration Information Not Programmed - GPCM

 
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