FUEL TANK SENDER ASSEMBLY CALIBRATION/POOR MILEAGE

Subject: FUEL TANK SENDER ASSEMBLY CALIBRATION/POOR MILEAGE RANGE

Model and Year: 1990 U VAN (APV)

TO: ALL CHEVROLET DEALERS

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

Parts are currently available from GMSPO.

Labor Operation Number: L1200

REFER TO APPLICABLE MODEL YEAR LABOR TIME GUIDE FOR LABOR TIME.

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.