GM Service Manual Online
For 1990-2009 cars only

DTC

Diagnostic Procedure

Module(s)

B1770

DTC B1770, B1775, B1780, B1785, B1790, B1805, or B2415

DSM

B1775

DTC B1770, B1775, B1780, B1785, B1790, B1805, or B2415

DSM

B1780

DTC B1770, B1775, B1780, B1785, B1790, B1805, or B2415

DSM

B1785

DTC B1770, B1775, B1780, B1785, B1790, B1805, or B2415

DSM

B1826

DTC B1826

DSM