GM Service Manual Online
For 1990-2009 cars only

DTC

Diagnostic Procedure

Module(s)

C1211

DTC C1211

EBCM

C1214

DTC C1214

EBCM

C1217

DTC C1217

EBCM

C1218

DTC C1218

EBCM

C1221-C1235

DTC C1221-C1235

EBCM

C1236

DTC C1236

EBCM

C1237

DTC C1237

EBCM

C1238

DTC C1238

EBCM

C1241

DTC C1241 in Variable Effort Steering

EBCM

C1242 or C1243

DTC C1242 or C1243

EBCM

C1248

DTC C1248

EBCM

C1251

DTC C1251

EBCM

C1252 or C1253

DTC C0635, C0638, C0640, C0643, C1252, or C1253 in Electronic Suspension Control (ESC)

EBCM

C1254

DTC C1254

EBCM

C1255 or C1256

DTC C1255 or C1256

EBCM

C1261-C1274

DTC C1261-C1274

EBCM

C1276

DTC C1276, P1644, or P1689

EBCM

C1277

DTC C1277 or P1571

EBCM

C1278

DTC C1278

EBCM

C1281, C1283, or C1286

DTC C1281, C1283, or C1286

EBCM

C1282

DTC C1282

EBCM

C1284 or C1285

DTC C1284 or C1285

EBCM

C1287 or C1288

DTC C1287 or C1288

EBCM

C1291 or C1293

DTC C1291 or C1293

EBCM

C1294

DTC C1294

EBCM

C1295

DTC C1295

EBCM

C1298

Scan Tool Does Not Communicate with Class 2 Device in Data Link Communications

EBCM

P1571

DTC C1277 or P1571

PCM

P1644

DTC C1276, P1644, or P1689

PCM