TrailBlazer 2WD V8-5.3L (2007)
PROM - Programmable Read Only Memory: Customer Interest
Engine Controls - MIL ON/DTC P0483 Set
Bulletin No.: 06-06-02-010B
Date: September 22, 2006
TECHNICAL
Subject:
Service Engine Soon Lamp Illuminated with Engine Cooling Fan System Performance DTC P0483 Currently Set or Stored in History (Reprogram PCM)
Models:
2007 Buick Rainier
2007 Chevrolet TrailBlazer Models
2007 GMC Envoy Models
2007 Saab 9-7X
with 4.2L, 5.3L or 6.0L Engine (VINs S, M, H - RPOs LL8, LH6, LS2)
Supercede:
This bulletin is being revised to remove the Isuzu Ascender model from the VIN breakpoint table. Please discard Corporate Bulletin Number
06-06-02-010A (Section 06 - Engine/Propulsion System).
Condition
Some customers may comment on a Service Engine Soon (SES) lamp illuminated. Technicians may find an Engine Cooling Fan System Performance
Diagnostic Trouble Code (DTC) P0483 currently set or stored in history.
Cause
This condition may be caused by more sensitive Powertrain Control Module (PCM) diagnostics and a reduced fan flare clutch for 2007 that have
resulted in a system that is more sensitive to setting the fan performance DTC, P0483, while driving at low speed after a start-up with the Air
Conditioning (A/C) on.
Correction
Technicians are to update the Powertrain Control Module (PCM) software in vehicles built prior to the VIN breakpoints shown.
