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Diagnostic Code Index

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2001 GMC Yukon XL, 2001 GMC Yukon, 2001 GMC Sierra, 2001 GMC Cab & Chassis Sierra, and 2001 GMC C3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC CODE INDEX

DTC Description
DTC B1000  Module Has Detected An Internal Malfunction
DTC B1004  KAM in the module has been reset
DTC B1007  EEPROM data does not match
DTC B1009  Inverse Copy Of The Digital Value Does Not Equal 0
DTC B1397  BCM 5 Volt Reference Output Circuit Is Less Than 4.75 Volts
DTC B1398  BCM 5V Reference Circuit Above 5.25V
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