Fuel System - Engine No Start/Inaccurate Fuel Gauge
Bulletin No.: 04-08-49-019ADate: July 28, 2004
TECHNICAL
Subject:
Cranks But No Start, Stall, Inaccurate/Incorrect Fuel Gauge Reading, No Fuel, Vehicle Is Out of Fuel and Fuel Gauge Reads Above Empty (Replace Fuel Module/Sender/Sensor)
Models:
2001-2004 Chevrolet Silverado
2001-2004 GMC Sierra
with 6.6L Duramax(TM) Diesel Engine VIN 1 - RPO LB7)
Supercede:
This bulletin is being revised to correct a part number. Please discard Corporate Bulletin Number 04-08-49-019 (Section 08 - Body and Accessories).
Condition
Some customers may comment that the vehicle stalls and will not restart, vehicle runs out of fuel or vehicle appears to be out of fuel but the fuel gauge reads above empty. The fuel gauge may read approximately 1/4 tank.
Cause
Contamination on the fuel sending card may cause inaccurate/incorrect fuel gauge readings.
Correction
Follow the service procedure below for diagnosis and repair of this concern.
1. Confirm that the vehicle is actually out of fuel by attempting to prime the fuel system.
^ If the vehicle is not out of fuel but Engine Cranks but Does Not Run, refer to SI Document.
^ If the vehicle is out of fuel and the gauge does not read empty, test the fuel gauge. Refer to the following procedures:
- Fuel Gage Inaccurate or Inoperative Single Tank.
- Fuel Gage Inaccurate or Inoperative Dual Tanks.
2. If testing reveals that the fuel gauge is operating correctly, replace the fuel sender assembly and auxiliary tank fuel level sensor, if equipped.
3. Remove the fuel tank. Refer to the following applicable procedure:
^ Fuel Tank Replacement Pickup
^ Fuel Tank Replacement Cab/Chassis - Front
^ Fuel Tank Replacement Cab/Chassis - Rear
4. Replace the fuel sender and sensor if equipped with an auxiliary tank. Refer to Fuel Sender Assembly Replacement and Fuel Level Sensor Replacement if equipped with an auxiliary fuel tank.
Parts Information
Parts are in limited quantities. Please DO NOT order parts for stock.
Parts are currently available from GMSPO.
Warranty Information
For vehicles repaired under warranty, use the table.
Disclaimer