GM Service Manual Online
For 1990-2009 cars only

DTC

Description

Type

Illuminate MIL

B1000

Communication Errors

NAV

No

B1004

Loss of Keep Alive Memory (KAM)

NAV

No

B1327

Source/Battery Voltage Low

NAV

No

B1328

Source/Battery Voltage High

NAV

No

B2460

Excessive Current Consumption on SEL +B

NAV

No

B2461

Navigation ECU Synchronous Signal Error

NAV

No

B2462

GPS Signal Error

NAV

No

B2463

CD Player No Disk Error

NAV

No

B2464

CD ROM Decoding Error

NAV

No

B2465

CD ROM Data Error

NAV

No

B2468

Navigation Display ECU Internal Error

NAV

No

U2150

Navigation ECU Gateway Com Error

NAV

No

U2151

Navigation ECU Communication Error

NAV

No

U2152

Bus Request Line Short to Ground

NAV

No