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Diagnostic Trouble Code Definitions

WARNING: This page is about a different car, the 2001 GMC Safari and 2001 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC TROUBLE CODE DEFINITIONS

DTC (1) (2) Description Test Procedure
B0016 Right Front Frontal Deployment Loop Resistance Low (3)
B0017 Right Front Frontal Deployment Loop Open (3)
B0018 Right Front Frontal Deployment Loop Short To Ground/Voltage Out Of Range (3)
B0022 Left Front Frontal Deployment Loop Resistance Low (3)
B0024 Left Front Frontal Deployment Loop Short To Ground/Voltage Out Of Range (3)
B0026 Left Front Frontal Deployment Loop Open (3)
B0035 ADS Closed/Short To Ground (3)
B0036 ADS Open/Missing/Short To Battery (3)
B0051 Deployment Commanded (3)
B0053 Deployment Commanded With Loop Malfunctions Present (3)
B1000 Module Malfunction B1000 
B1001 Optional Configuration Error (3)
B1367 IPC Ignition 0 Circuit Low (4)
B1397 Device Voltage Reference Out No. 1 Circuit Low B1397 
B1398 Device Voltage Reference Out No. 1 Circuit High B1398 
B1477 RAP Circuit Low B1477 
B1478 RAP Circuit High B1478 
B1480 Battery Rundown Protection Circuit Malfunction B1480 
B2575 Headlight Control Circuit Malfunction (5)
B2577 ALC Headlight Control Circuit Low (5)
B2585 Park Light Control Circuit Malfunction (6)
B2613 Passenger Compartment Dimming 1 Circuit High (7)
B2617 Passenger Compartment Dimming 2 Circuit Low (7)
B2618 Passenger Compartment Dimming 2 Circuit High (7)
B2647 Ambient Light Sensor Short To Ground/Open (5)
B2648 Ambient Light Sensor Short To Battery (5)
B2722 Transmission Preference Switch Circuit Low (8)
B2752 Horn Relay Coil Circuit Low (9)
B2947 Security System Sensor Power Circuit Low (10)
B2948 Security System Sensor Power Circuit High (10)
B2957 Security System Sensor Data Circuit Low (10)
B2958 Security System Sensor Data Circuit High (10)
B2960 Security System Sensor Data Incorrect But Valid (10)
B2961 Key In Ignition Circuit Malfunction (10)
B3031 Security System Controller In Learn Mode (10)
B3033 Security System Indicates Tamper (10)
B3102 Keyless Entry Data Link Circuit Low (11)
B3137 All Door Lock Circuit Low (12)
B3138 All Door Lock Circuit High (12)
B3147 Right Front Unlock Switch Circuit Low (12)
B3148 Right Front Unlock Switch Circuit High (12)
CXXX Electronic Brake Control Module (EBCM) (13)
PXXXX Powertrain Control Module (PCM) (14)
U1000 & U1255 CLASS 2 COMMUNICATION MALFUNCTION U1000 & U1255 
U1001-U1254 LOSS OF XXX COMMUNICATIONS U1001-U1254 
U1300 Class 2 Serial Data Link Low U1300 
U1301 Class 2 Serial Data Link High U1301 
(1) For DTCs not listed, repair appropriate system as necessary.
(2) See DIAGNOSTIC TESTS  for test and repair procedures.
(3) For information on air bag DIAGNOSIS & TESTING or DISPOSAL PROCEDURES, see lemon-25(R) AIR BAG SERVICE & REPAIR MANUAL, DOMESTIC & IMPORTED MODELS.
(4) See ANALOG INSTRUMENT PANELS - ASTRO & SAFARI article.
(5) See HEADLIGHT SYSTEMS & DAYTIME RUNNING LIGHTS article.
(6) See EXTERIOR LIGHTS article.
(7) See ILLUMINATION/INTERIOR LIGHTS article.
(8) Transfer case DTC.
(9) See STEERING COLUMN SWITCHES - TRUCKS - EXCEPT TRACKER article.
(10) See ANTI-THEFT SYSTEMS - ASTRO & SAFARI article.
(11) See REMOTE KEYLESS ENTRY SYSTEMS - ASTRO & SAFARI article.
(12) See POWER DOOR LOCKS & REAR HATCH RELEASE - ASTRO & SAFARI article.
(13) For Electronic Brake Control Module (EBCM) diagnostic trouble code descriptions and testing procedures, see appropriate ANTI-LOCK article in BRAKES.
(14) For Powertrain Control Module diagnostic trouble code descriptions and testing procedures, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
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