Impala V8-5.3L (2008)
Technical Service Bulletin # 09-06-03-007
Date: 090827
Cooling System - MIL ON DTC P0480/P0481 Set
TECHNICAL
Bulletin No.: 09-06-03-007
Date: August 27, 2009
Subject: Malfunction Indicator Lamp (MIL) Illuminated, DTC P0480 and/or P0481 Set - Temperature Gage Indicates Hot - Cooling Fans Intermittent
or Inoperative (Install Revised Cooling Fan Relay and Harness Assembly)
Models:
2006-2009 Chevrolet Impala Police Sedan (RPO 9C1 Only)
2010 Chevrolet Impala Police Sedan (with RPO 9C1 and without RPO WRH)
Condition
Some customers may comment that the instrument panel temperature gage indicates hot.
Some customers may also comment that the malfunction indicator lamp (MIL) is illuminated.
The technician may observe that DTC P0480 and/or P0481 are set as current or in history and/or the engine cooling fans are intermittent or inoperative.
Cause
This condition may be caused by high underhood bussed electrical center (UBEC) temperatures which may result in the cooling fans becoming
intermittent or inoperative under certain operating conditions.
Disclaimer
Part # 1
A revised engine cooling fan relay and harness assembly has been released, to reposition the cooling fan relays for increased air circulation.
1. Turn OFF the ignition, all electrical components, lamps, accessories and the scan tool.
Open the hood.
