FUEL TANK SENDER ASSEMBLY CALIBRATION/POOR MILEAGE

SUBJECT: FUEL TANK SENDER ASSEMBLY CALIBRATION/POOR MILEAGE RANGE (REPLACE FUEL TANK AND FUEL TANK SENDER ASSEMBLY)

VEHICLES AFFECTED: 1990 U-VAN

CONDITION:

---------- Comments have been received on 1990 U-vans noting poor vehicle mileage range and/or poor empty reserve characteristics. Indication to the vehicle operator of these conditions may be that a fuel fill of only 15-16 gallons may be achieved when fuel gauge reads approximately empty.

CAUSE:

------ Fuel tank sender calibration and/or concavity (bowing upward) of lower fuel tank surface.

CORRECTION:

----------- Replace existing fuel tank and fuel tank sender assembly with those indicated below following applicable Service Manual procedures.

Part Name Part Number ----------- ----------- Fuel Tank Assembly 14098942

Fuel Tank Sender Unit 25028199

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those 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 a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.