GM Service Manual Online
For 1990-2009 cars only

DTC

Diagnostic Procedure

Module

B0263

DTC B0263, B0408, or B0418

HVAC Control Module

B0408

DTC B0263, B0408, or B0418

HVAC Control Module

B0414

DTC B0414, B0424, or B3770

HVAC Control Module

B0418

DTC B0263, B0408, or B0418

HVAC Control Module

B0424

DTC B0414, B0424, or B3770

HVAC Control Module

B1375

DTC B1375

HVAC Control Module

B3770

DTC B0414, B0424, or B3770

HVAC Control Module

P0530

DTC P0530

PCM