Sierra 1500 4WD V8-6.0L (2007)
Multiple Junction Connector: All Technical Service Bulletins
A/C - Does Not Cool/Can't Change Mode/DTC's Set
Bulletin No.: 07-01-38-009B
Date: November 28, 2007
TECHNICAL
Subject:
EI07264 - Manual HVAC, Temperature or Mode Actuator Performance, A/C Does Not Cool, Unable to Change Mode, DTC B0228, B0413, B0423,
B0433, B3779, B3782 (Diagnose for Intermittent Wiring Connection at RH BEC)
Models:
2007-2008 Chevrolet Silverado
2007-2008 GMC Sierra
Extended and Crew Cab Models Only with Manual Temperature Control HVAC System (RPO C67)
Supercede:
This bulletin is being revised to end the need for engineering information and to provide diagnostic procedures to accurately diagnose this condition.
Please discard Corporate Bulletin Number 07-01-38-009A (Section 01 - HVAC).
Condition
This concern only applies to Extended or Crew cab vehicles.
If the customer did not bring their vehicle in for this concern, do no proceed with this bulletin.
Some customers may comment that the A/C blows hot air or is inoperative. They may also comment that they are unable to change the temperature or
HVAC mode of the vehicle. Under these conditions, the actuator has moved to a default position. Refer to the table.
Cause
