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2002 Corvette: Service Bulletin: Erratic Fuel Gauge Reading (Reprogram the PCM)

Model Year: 2002
Subject: Erratic Fuel Gauge Reading (Reprogram the PCM)
Source: Chevrolet Dealer Service Technical Bulletin
Number: 02-06-04-010

Some owners may comment about the fuel gauge intermittently indicating an empty reading and then return to the correct fuel level indication.

This condition may result when fuel blends containing aggressive sulphur compounds react with the fuel sender assembly, which may result in voltage spikes being induced on the fuel level signal to the PCM. Use of another fuel blend may reverse this reaction and return the system to normal operation.

Reprogram the PCM with the new service calibration which is available in the January 2002, Techline TIS 2000 release. Use the TIS 01/2002 or later data update.

Warranty Information
For vehicles repaired under warranty, use:

Labor Operation


Labor Time


Powertrain Controller - Reprogram

0.4 hr

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

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