GM Service Manual Online
For 1990-2009 cars only

DTC

Diagnostic Procedure

Module

P1573

Lost communications with Brake Control (EBCM) System

Refer to DTC U1304 .

PCM

U1000

Class Data link Malfunction

Refer to DTC U1000 and U1255 .

SDM, VIU

U1016

Loss of PCM Communications

Refer to DTC U1001-U1254 .

SDM, VIU

U1088

Loss of SIR / SDM Communications

Refer to DTC U1001-U1254 .

VIU

U1192

Loss of VTD Communications

Refer to DTC U1001-U1254 .

VIU

U1300

Class 2 Data Link Low

Refer to DTC U1300 .

SDM, VIU

U1301

Class 2 Data Link High

Refer to DTC U1301 .

SDM, VIU

U1304

Loss of UART Communications

Refer to DTC U1304 .

PCM