Diagnostic Trouble Code list 2k c/k

[mjgjr72]

it's a long list

Engine Controls - 4.3L

DTC P0101 Mass Air Flow (MAF) Sensor Performance
DTC P0102 Mass Air Flow (MAF) Sensor Circuit Low Frequency
DTC P0103 Mass Air Flow (MAF) Sensor Circuit High Frequency
DTC P0106 Manifold Absolute Pressure (MAP) System Performance
DTC P0107 Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage
DTC P0108 Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage
DTC P0112 Intake Air Temperature (IAT) Sensor Circuit Low Voltage
DTC P0113 Intake Air Temperature (IAT) Sensor Circuit High Voltage
DTC P0117 Engine Coolant Temperature (ECT) Sensor Circuit Low Voltage
DTC P0118 Engine Coolant Temperature (ECT) Sensor Circuit High Voltage
DTC P0121 Throttle Position (TP) Sensor Performance
DTC P0122 Throttle Position (TP) Sensor Circuit Low Voltage
DTC P0123 Throttle Position (TP) Sensor Circuit High Voltage
DTC P0125 Engine Coolant Temperature (ECT) Excessive Time to Closed Loop Fuel Control
DTC P0131 H02S Circuit Low Voltage Bank 1 Sensor 1
DTC P0132 H02S Circuit High Voltage Bank 1 Sensor 1
DTC P0133 H02S Slow Response Bank 1 Sensor 1
DTC P0134 H02S Circuit Insufficient Activity Bank 1 Sensor 1
DTC P0135 H02S Heater Performance Bank 1 Sensor 1
DTC P0137 H02S Circuit Low Voltage Bank 1 Sensor 2
DTC P0138 H02S Circuit High Voltage Bank 1 Sensor 2
DTC P0140 H02S Circuit Insufficient Activity Bank 1 Sensor 2
DTC P0141 H02S Heater Performance Bank 1 Sensor 2
DTC P0151 H02S Circuit Low Voltage Bank 2 Sensor 1
DTC P0152 H02S Circuit High Voltage Bank 2 Sensor 1
DTC P0153 H02S Slow Response Bank 2 Sensor 1
DTC P0154 H02S Circuit Insufficient Activity Bank 2 Sensor 1
DTC P0155 H02S Heater Performance Bank 2 Sensor 1
DTC P0157 H02S Circuit Low Voltage Bank 2 Sensor 2
DTC P0158 H02S Circuit High Voltage Bank 2 Sensor 2
DTC P0160 H02S Circuit Insufficient Activity Bank 2 Sensor 2
DTC P0161 H02S Heater Performance Bank 2 Sensor 2
DTC P0171 Fuel Trim System Lean Bank 1
DTC P0172 Fuel Trim System Rich Bank 1
DTC P0174 Fuel Trim System Lean Bank 2
DTC P0175 Fuel Trim System Rich Bank 2
DTC P0300 Engine Misfire Detected
DTC P0325 Knock Sensor Module Performance
DTC P0327 Knock Sensor (KS) Circuit
DTC P0336 Crankshaft Position (CKP) Sensor Performance
DTC P0337 Crankshaft Position (CKP) Sensor Circuit Low Duty Cycle
DTC P0338 Crankshaft Position (CKP) Sensor Circuit High Duty Cycle
DTC P0339 Crankshaft Position (CKP) Sensor Circuit Intermittent
DTC P0340 Camshaft Position (CMP) Sensor Circuit
DTC P0341 Camshaft Position (CMP) Sensor Performance
DTC P0401 Exhaust Gas Recirculation (EGR) Flow Insufficient
DTC P0404 Exhaust Gas Recirculation (EGR) Open Position Performance
DTC P0405 Exhaust Gas Recirculation (EGR) Position Sensor Circuit Low Voltage
DTC P0410 Secondary Air Injection (AIR) System
DTC P0420 Catalyst System Low Efficiency Bank 1
DTC P0430 Catalyst System Low Efficiency Bank 2
DTC P0440 Evaporative Emission (EVAP) System
DTC P0442 Evaporative Emission (EVAP) System Small Leak Detected
DTC P0446 Evaporative Emission (EVAP) Vent System Performance
DTC P0452 Fuel Tank Pressure Sensor Circuit Low Voltage
DTC P0453 Fuel Tank Pressure Sensor Circuit High Voltage
DTC P0461 Fuel Level Sensor Performance
DTC P0462 Fuel Level Sensor Circuit Low Voltage
DTC P0463 Fuel Level Sensor Circuit High Voltage
DTC P0500 Vehicle Speed Sensor (VSS) Circuit
DTC P0506 Idle Speed Low
DTC P0507 Idle Speed High
DTC P0601
DTC P0602 Control Module Not Programmed
DTC P0603 Control Module Long Term Memory Reset
DTC P0604 Control Module Random Access Memory (RAM)
DTC P0605 Control Module Programming Read Only Memory (ROM)
DTC P0704 Clutch Switch Circuit
DTC P1106 Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent High Voltage
DTC P1107 Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent Low Voltage
DTC P1111 Intake Air Temperature (IAT) Sensor Circuit Intermittent High Voltage
DTC P1112 Intake Air Temperature (IAT) Sensor Circuit Intermittent Low Voltage
DTC P1114 Engine Coolant Temperature (ECT) Sensor Circuit Intermittent Low Voltage
DTC P1115 Engine Coolant Temperature (ECT) Sensor Circuit Intermittent High Voltage
DTC P1121 Throttle Position (TP) Sensor Circuit Intermittent High Voltage
DTC P1122 Throttle Position (TP) Sensor Circuit Intermittent Low Voltage
DTC P1133 H02S Insufficient Switching Bank 1 Sensor 1
DTC P1134 H02S Transition Time Ratio Bank 1 Sensor 1
DTC P1153 H02S Insufficient Switching Bank 2 Sensor 1
DTC P1154 H02S Transition Time Ratio Bank 2 Sensor 1
DTC P1336 Crankshaft Position (CKP) System Variation Not Learned
DTC P1345 Crankshaft Position (CKP)-Camshaft Position (CMP) Correlation
DTC P1351 Ignition Coil Control Circuit High Voltage
DTC P1361 Ignition Coil Control Circuit Low Voltage
DTC P1380 Misfire Detected - Hough Road Data Not Available
DTC P1381 Misfire Detected - No Communication with Brake Control Module
DTC P1404 Exhaust Gas Recirculation (EGR) Closed Position Performance
DTC P1415 Secondary Air Injection (AIR) System Bank 1
DTC P1416 Secondary Air Injection (AIR) System Bank 2
DTC P1441 Evaporative Emission (EVAP) System Flow During Non-Purge
DTC P1508 Idle Speed Low - Idle Air Control (IAC) System Not Responding
DTC P1509 Idle Speed High - Idle Air Control (IAC) System Not Responding
DTC P1621 Control Module Long Term Memory Performance
DTC P1626 Theft Deterrent Fuel Enable Signal Not Received
DTC P1631 Theft Deterrent Start Enable Signal Not Correct

Engine Controls - 4.8L, 5.3L, and 6.0L (that are not listed with 4.3L)

DTC P0200 Injector Control Circuit
DTC P0230 Fuel Pump Relay Control Circuit
DTC P0335 Crankshaft Position (CKP) Sensor Circuit
DTC P0342 Camshaft Position (CMP) Sensor Circuit Low Voltage
DTC P0343 Camshaft Position (CMP) Sensor Circuit High Voltage
DTC P0351 Ignition Coil 1 Control Circuit
DTC P0352 Ignition Coil 2 Control Circuit
DTC P0353 Ignition Coil 3 Control Circuit
DTC P0354 Ignition Coil 4 Control Circuit
DTC P0355 Ignition Coil 5 Control Circuit
DTC P0356 Ignition Coil 6 Control Circuit
DTC P0357 Ignition Coil 7 Control Circuit
DTC P0358 Ignition Coil 8 Control Circuit
DTC P0418 Secondary Air Injection (AIR) Pump Relay Control Circuit
DTC P0443 Evaporative Emission (EVAP) Purge Solenoid Control Circuit
DTC P0449 Evaporative Emission (EVAP) Vent Solenoid Control Circuit
DTC P0562 System Voltage Low
DTC P0563 System Voltage High
DTC P0705 Trans Range Switch Circuit
DTC P0706 Trans Range Switch Performance
DTC P1120 Throttle Position (TP) Sensor 1 Circuit
DTC P1121 Throttle Position (TP) Sensor Circuit Intermittent High Voltage
DTC P1122 Throttle Position (TP) Sensor Circuit Intermittent Low Voltage
DTC P1125 Accelerator Pedal Position (APP) System
DTC P1172 Sec Fuel Pump Insufficient/ No Fuel Flow
DTC P1220 Throttle Position (TP) Sensor 2 Circuit
DTC P1221 Throttle Position (TP) Sensor 1- 2 Correlation
DTC P1258 Engine Coolant Overtemperature - Protection Mode Active
DTC P1275 Accelerator Pedal Position (APP) Sensor 1 Circuit
DTC P1276 Accelerator Pedal Position (APP) Sensor 1 Performance
DTC P1280 Accelerator Pedal Position (APP) Sensor 2 Circuit
DTC P1281 Accelerator Pedal Position (APP) Sensor 2 Performance
DTC P1285 Accelerator Pedal Position (APP) Sensor 3 Circuit
DTC P1286 Accelerator Pedal Position (APP) Sensor 3 Performance
DTC P1431 Fuel Level Sensor 2 Performance
DTC P1432 Fuel Level Sensor 2 Circuit Low Voltage
DTC P1433 Fuel Level Sensor 2 Circuit High Voltage
DTC P1514 Throttle Body Performance
DTC P1515 Control Module Throttle Actuator Position Performance
DTC P1516 Throttle Actuator Control (TAG) Module Throttle Actuator Position Performance
DTC P1517 Throttle Actuator Control (TAC) Module Performance
DTC P1518 Throttle Actuator Control (TAC) Module Serial Data Circuit
DTC P1571 Traction Control Torque Request Circuit
DTC P1635 5 Volt Reference 1 Circuit
DTC P1637 Generator L-Terminal Circuit
DTC P1638 Generator F-Termina! Circuit
DTC P1639 5 Volt Reference 2 Circuit

Automatic Transmission - 4L80-E

DTC P0218 Transmission Fluid Overtemperature
DTC P0502 Vehicle Speed Sensor (VSS) Circuit Low Input
DTC P0503 Vehicle Speed Sensor (VSS) Circuit Intermittent
DTC P0711 TFT Sensor Circuit Range/Performance
DTC P0712 Transmission Fluid Temperature (TFT) Sensor Circuit Low Input
DTC P0713 Transmission Fluid Temperature (TFT) Sensor Circuit High Input
DTC P0716 Input Speed Sensor Circuit Intermittent
DTC P0717 Input Speed Sensor Circuit Low Input
DTC P0719 Brake Switch Circuit Low Input
DTC P0724 Brake Switch Circuit High Input
DTC P0730 Incorrect Gear Ratio
DTC P0741 TCC System Stuck Off
DTC P0742 TCC System Stuck On
DTC P0748 Pressure Control Solenoid Circuit Electrical
DTC P0751 1-2 Shift Solenoid Valve Performance
DTC P0753 1-2 Shift Solenoid Circuit Electrical
DTC P0756 2-3 Shift Solenoid Valve Performance
DTC P0758 2-3 Shift Solenoid Circuit Electrical
DTC P1810 TFP Valve Position Switch Circuit
DTC P1860 TCC PWM Solenoid Circuit Electrical
DTC P1870 Transmission Component Slipping
DTC P1875 4WD Low Switch Circuit Electrical

Automatic Transmission - 4L60E (that are not listed with 4L80E)

DTC P0740 TCC Enable Solenoid Circuit Electrical
DTC P0785 2-3 Shift Solenoid Circuit Electrical

Transfer Case

DTC B2725 ATC Mode Switch Circuit Malfunction
DTC C0300 Rear Speed Sensor Malfunction
DTC C0305 Front Speed Sensor Malfunction
DTC C0308 Motor A/B Circuit Low
DTC C0309 Motor A/B Circuit High
DTC C0310 Motor A/B Circuit Open
DTC c0315 Motor Ground Circuit Open
DTC C0323 T-Case Lock Circuit Low
DTC C0324 T-Case Lock Circuit High
DTC C0327 Encoder Circuit Malfunction
DTC C0367 Front Axle Control Circuit High
DTC C0374 General System Malfunction
DTC C0376 Front/Rear Shaft Speed Mismatch
DTC C0387 Unable to Perform Shift
DTC C0550 ECU Malfunction
DTC C0611 VIN Information Error

Body Control System

DTC B1000 ECU Malfunction
DTC B1397 Device Voltage Reference Out #1 CKT Low
DTC B1398 Device Voltage Reference Out #f CKT High
DTC B 1477 Retained Accessory Power Circuit Low
DTC B1478 Retained Accessory Power Circuit High
DTC B1480 Battery Rundown Protection Circuit Malf
DTC B2527 Front Fog Lamp Circuit Low
DTC B2577 Headlamp Control Circuit Low
DTC B2585 Parklamp Control Circuit Malfunction
DTC B2613 Pass Compartment Dimming #1 Circuit High
DTC B2617 Pass Compartment Dimming #2 Circuit Low
DTC B2618 Pass Compartment Dimming #2 Circuit High
DTC B2647 Ambient Light Sensor Circuit Low
DTC B2648 Ambient Light Sensor Circuit High
DTC B2722 Trans Preference Switch Circuit Low 4L60-E and 4L80-E Transmission
DTC B2752 Horn Relay Coil Circuit Low
DTC B2947 Security System Sensor Power CKT Low
DTC B2948 Security System Sensor Power CKT High
DTC B2957 Security System Sensor Data Circuit Low
DTC B2958 Security System Sensor Data Circuit High
DTC B2960 Sec Sys Sensor Data Incorrect but Valid
DTC B2961 Key In Ignition Circuit Malfunction
DTC B2973 LF Door Key Switch Circuit Low
DTC B3031 Security System Controller in Learn Mode
DTC B3033 Security System Indicates Tamper
DTC B3102 Keyless Entry Data Link Circuit Low
DTC B3137 All Door Lock Circuit Low
DTC B3138 All Door Lock Circuit High
DTC B3147 RF Unlock Switch Circuit Low
DTC B3148 RF Unlock Switch Circuit High
DTC COOOO Vehicle Speed Information Circuit Malfunction (W/RTD) or (W/0 RTD)
DTC C0472 Steering Handwheel Speed Sensor Signal V Low
DTC C0473 Steering Handwheel Speed Sensor Signal V High
DTC C0495 EVO Tracking Error (W/RTD) or (W/0 RTD)
DTC C0498 Steering Assist Control Actuator Feed Circuit Low
DTC C0499 Steering Assist Control Solenoid Feed Circuit High
DTC C0503 Steering Assist Control Solenoid Return Circuit Low
DTC C0504 Steering Assist Control Solenoid Return Circuit High

HVAC System

DTC B0159 Outside Air Temperature Sensor Circuit Range/Performance I
DTC B0164 Passenger Compartment Temperature Sensor #1 (Single Sensor or LH) Circuit Range/Performance
DTC B0174 Output Air Temperature Sensor #1 (Upper; Single or LH) Circuit Range/Performance I
DTC B0179 Output Air Temperature Sensor #2 (Lower; Single or LH) Circuit Range/Performance I
DTC B0184 Solar Load Sensor #1 CKT Range
DTC B0229 Air Flow Control #7 (Recirc) Feedback Circuit Range/Performance I
DTC B0248 Mode Door Inoperative Error
DTC B0268 Air Flow Control #7 (Recirc) Circuit Malfunction
DTC B0408 Temperature Control #1 (Main/Front) Circuit Malfunction
DTC B0414 Temperature Control #1 (Main/Front) Feedback Circuit Range/Performance
DTC B0429 Air Mix Door #3 Range Error
DTC B0434 Temperature Control #3 Rear Feedback Circuit Range
DTC B1000 ECU Malfunction
DTC B1020 Auxiliary ECU Malfunction
DTC B3531 Air Flow Control #10 Rear Circuit Malfunction
DTC B3579 Output Air Temperature Sensor #6 Circuit Range/Performance
DTC B3584 Output Air Temperature Sensor #7 Circuit Range/Performance
DTC B3761 Air Flow Control #3 (Blend Defog/Floor) Feedback Circuit Range/Performance
DTC B3764 Airflow Control #4 Mode Feedback Circuit Malfunction
DTC U1500 Communication (Front to Rear) State of Health

Instrument Panel, Gauges

DTC B1367 IPC Ignition 0 Circuit Low
DTC P0117 Engine Coolant Temperature (ECT) Sensor Circuit Low Voltage in Engine Controls - 4.3L or 4.8L, 5.3L, 6.0L
DTC P0118 Engine Coolant Temperature (ECT) Sensor Circuit High Voltage in Engine Controls - 4.3L or 4.8L, 5.3L, 6.0L
DTC P0461 Fuel Level Sensor Performance in Engine Controls - 4.3L or 4.8L, 5.3L, 6.0L
DTC P0462 Fuel Level Sensor Circuit Low Voltage in Engine Controls - 4.3L or 4.8L, 5.3L, 6.0L
DTC P0463 Fuel Level Sensor Circuit High Voltage in Engine Controls - 4.3L or 4.8L, 5.3L, 6.0L
DTC P0500 Vehicle Speed Sensor (VSS) Circuit in Engine Controls - 4.3L or 4.8L, 5.3L, 6.0L
DTC P0608 Vehicle Speed Output Circuit in Engine Controls - 4.8L, 5.3L, 6.0L
DTC P0650 Malfunction Indicator Lamp (MIL) ControlCircuit in Engine Controls - 4.8L, 5.3L, 6.0L
DTC P0654 Engine Speed Output Circuit in Engine Controls - 4.8L, 5.3L, 6.0L

BXXXX ATC DTCs Refer to A Diagnostic System Check in Transfer Case - NVG 246
CXXXX ATC DTCs Refer to A Diagnostic System Check in Transfer Case - NVG 246
BXXXX BCM DTCs Refer to A Diagnostic System Check - Body Control System in Body Control Systems
BXXXX SDM DTCs Refer to A Diagnostic System Check - SIR in SIR
CXXXX EBCM DTCs Refer to A Diagnostic System Check in Antilock Brake Systems
CXXXX RTD DTCs Refer to Real Time damping Module in Suspension
PXXXX Other PCM DTCs Refer to A Powertrain On Board Diagnostic (OBD) System Check in Engine Controls - 4.3L, or 4.8L, 5.3L, 6.0L
U1XXX Refer to Scan Tool Does Not Communicate with Class 2 Device in Data Link Communications

Cellular Communication OnStar

DTC B1000 ECU Malfunction
DTC B1004 Keep Alive Memory (KAM) Reset
DTC B1009 EEPROM Checksum Error
DTC B2462 GPS Signal Error
DTC B2476 Cellular Phone Select Service Switch Malfunction
DTC U1300 Class 2 Data Link Low
DTC U1301 Class 2 Data Link High
DTC U1500 Inter-Device Dedicated Bus Malfunction

Lighting Systems

DTC B2527 Front Fog Lamp Circuit Low
DTC B2577 Headlamp Control Circuit Low
DTC B2585 Parklamp Control Circuit Malfunction
DTC B2613 Pass Compartment Dimming #1 Circuit High
DTC B2617 Pass Compartment Dimming #2 Circuit Low
DTC B2618 Pass Compartment Dimming #2 Circuit High
DTC B2642 Delayed Exterior Lighting Ctrl CKT Low
DTC B2643 Delayed Exterior Lighting Ctrl CKT High
DTC B2647 Ambient Light Sensor Circuit Low
DTC B2648 Ambient Light Sensor Circuit High

ABS

DTC C0221-C0227 Wheel Speed Sensor Circuit Malfunction
DTC C0229 Drop Out of Front Wheel Speed Signals
DTC C0235 Rear Wheel Speed Signal Circuit Open
DTC C0236 Rear Wheel Speed Signal Circuit Missing
DTC C0237 Rear Wheel Speed Signal Erratic
DTC C0238 Wheel Speed Mismatch
DTC C0241-C0254 EBCM Control Valve Circuit
DTC C0265 or C0266 EBCM Relay Circuit
DTC C0267 or C0268 Pump Motor Circuit Open/Shorted
DTC C0269 or C0274 Excessive Dump/Isolation Time
DTC C0271-CQ273, C0284 EBCM Malfunction
DTC C0279 Powertrain Configuration Not Valid
DTC C0281 Brake Switch Circuit
DTC C0283 Traction Switch Shorted to Ground
DTC C0287 Delivered Torque Signal Malfunction
DTC C0292 Lost communication with Engine Control System
DTC C0297 Powertrain Configuration Data Not Received
DTC C0298 Powertrain Control Malfunction

Real Time Damping (RTD)

DTC COOOO Vehicle Speed Information Circuit Malfunction (W/RTD)
DTC C0550 ECU Malfunction
DTC C0551 Option Configuration Error
DTC C0575 Left Front Actuator Circuit Malfunction
DTC C0580 Right Front Actuator Circuit Malfunction
DTC C0585 Left Rear Actuator Circuit Malfunction
DTC C0590 Right Rear Actuator Circuit Malfunction
DTC C0615 Left Front Position Sensor Malfunction
DTC C0620 Right Front Position Sensor Malfunction
DTC C0625 Left Rear Position Sensor Malfunction
DTC C0630 Right Rear Position Sensor Malfunction
DTC C0655 Level Control Compressor Circuit Malfunction
DTC C0660 Level Control Exhaust Valve Circuit Malfunction
DTC C0665 Chassis Pitch Signal Circuit
DTC C0690 Damper Control Relay Circuit Malfunction
DTC C0711 Level Control Air Pressure Sensor Circuit Malfunction
DTC C0870 Device Voltage Reference Output # 1 Circuit Malfunction

SIR Diagnostic Trouble Code List

DTC B0016 RF/Passenger Frontal Deployment Loop (Single Stage or Stage 1) Resistance Low
DTC B0017 RF/Passenger Frontal Deployment Loop (Single Stage or Stage 1) Open
DTC B0018 RF/Passenger Frontal Deployment Loop (Single Stage or Stage 1) Short to Ground/Voltage Out of Range
DTC B0022 LF/Driver Frontal Deployment Loop (Single Stage or Stage 1) Resistance Low
DTC B0024 LF/Driver Frontal Deployment Loop (Single Stage or Stage 1) Short to Ground/Voltage Out of Range
DTC B0026 LF/Driver Frontal Deployment Loop (Single Stage or Stage 1) Open
DTC B0028 RF/Passenger Side Deployment Loop Resistance Low
DTC B0029 RF/Passenger Side Deployment Loop Open
DTC B0030 RF/Passenger Side Deployment Loop Short to Ground/Voltage Out of Range
DTC B0035 ADS Closed/Shorted to Ground
DTC B0036 ADS Open/Missing/Shorted to Battery
DTC B0040 LF/Driver Side Deployment Loop Resistance Low
DTC B0041 LF/Driver Side Deployment Loop Open
DTC B0045 LF Side Deploy Loop Short to Ground/Voltage Out of Range
DTC B0051 Deployment Commanded
DTC B0053 Deployment Commanded with Loop Malfunctions Present
DTC B0077 LF/Driver SIS Malfunction
DTC B0078 RF/Passenger SIS Malfunction
DTC B0079 Incorrect LF/Driver SIS Installed
DTC B0080 Discard LF/Driver SIS
DTC B0081 Incorrect RF/Passenger SIS Installed
DTC B0082 Discard RF/Passenger SIS
DTC B0090 Active Switch Voltage Out of Range
DTC B0091 Active Switch: Wrong State
DTC B1000 ECU Malfunction
DTC B1001 Option Configuration Error
DTC U1000 and DTC U1255 Class 2 Communication Malfunction
DTC U1001 - U1254 Loss of XXX Communications
DTC U1300 Class 2 Data Link Low
DTC U1301 Class 2 Data Link High

Variable Effort Steering

DTC COOOO Vehicle Speed Information Circuit Malfunction (W/RTD) or (W/0 RTD)
DTC C0470 Steering Position and Rate of Change Sensor Circuit No. 1 Malfunction
DTC C0472 Steering Handwheel Speed Sensor Signal V Low
DTC C0473 Steering Handwheel Speed Sensor Signal V High
DTC C0495 EVO Tracking Error (W/RTD) or (W/0 RTD)
DTC C0496 Steering Assist Control Actuator Feed Circuit Malfunction
DTC C0498 Steering Assist Control Actuator Feed Circuit Low
DTC C0499 Steering Assist Control Solenoid Feed Circuit High
DTC C0501 Steering Assist Control Actuator Return Circuit Malfunction
DTC C0503 Steering Assist Control Solenoid Return Circuit Low
DTC C0504 Steering Assist Control Solenoid Return Circuit High
DTC C0506 Steering Position and Rate of Change Sensor Circuit No. 2 Malfunction

[3wbdriver]

DUDE!!!! Thanks. It's in a Word doc in my Silverado folder now!

[BlenderWizard]

Maybe someone can make this a sticky?