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Old 02-09-2005, 07:52 PM   #4
anmracing
 
Join Date: Jan 2005
Posts: 194
I borrowed this from another site. Its from a technical service bulletin:

Speedometer Erratic Movement, Fuel Gauge Does Not Go to Full After Filling, Engine Coolant Temperature Gauge Reads Hot and Coolant Temperature Light Illuminates (Reprogram IPC) #05-08-49-003 - (Jan 20, 2005)
Speedometer Erratic Movement, Fuel Gauge Does Not Go to Full After Filling, Engine Coolant Temperature Gauge Reads Hot and Coolant Temperature Light Illuminates (Reprogram IPC)
2004 Pontiac GTO

Built Prior to VIN Breakpoint 4L29601

Condition
Some customers may comment on one or more of the following conditions:

Speedometer jumps erratically. Gauge may go up to 200 MPH or not return to zero.

Fuel gauge does not move off empty when tank is full.

Engine coolant temperature gauge reads hot and coolant temperature light illuminates.

These conditions may be intermittent.

Correction
Technicians are to reprogram the IPC with an updated software calibration. This new service calibration was released with TIS satellite data update version 1.0 available January 10, 2005. As always, make sure your Tech 2 is updated with the latest software version.

Important: Vehicles built after the VIN breakpoint must have the IPC replaced to correct these conditions.
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