FUEL TANK WILL NOT FILL TO CAPACITY/FUEL GAUGE. Cadillac Concours 1997

For 1990-2009 cars

# FUEL TANK WILL NOT FILL TO CAPACITY/FUEL GAUGE

#### SUBJECT: FUEL TANK WILL NOT FILL TO CAPACITY/FUEL GAUGE STAYS ON FULL FOR EXTENDED PERIOD OR FLUCTUATES (REPLACE FUEL LEVEL SENSOR AND/OR FUEL TANK)

#### MODELS: 1997 CADILLAC CONCOURS, DEVILLE, D'ELEGANCE, ELDORADO, SEVILLE

BUILT PRIOR TO VIN BREAKPOINTS:

CONCOURS/DEVILLE/D'ELEGANCE - VU275620 ELDORADO - VU614344 SEVILLE - VU828033

#### CONDITION:

SOME OWNERS MAY COMMENT ON THE FOLLOWING CONDITION(S) RELATIVE TO THE FUEL SYSTEM:

A. SHORT FILL/INABILITY TO FILL THE FUEL TANK COMPLETELY (I.E, ONLY 17-18 GALLONS {64-68 LITERS} MAXIMUM) OR FUEL GAUGE WILL NOT DISPLAY FULL (F) OR COMES OFF FULL (F) TOO QUICKLY AFTER FILL-UP.

B. FUEL GAUGE STAYS ON FULL (F) FOR AN EXTENDED PERIOD AND MAY SHOW A SUDDEN DROP FROM FULL (F) TO A NUMBER LOWER THAN 17 OR 18 (FOR GALLONS) OR 64-68 (FOR LITERS).

C. FUEL GAUGE READING IS ERRATIC (DOES NOT INCLUDE MINIMAL FLUCTUATION NOTED DURING NORMAL OPERATING MANEUVERS SUCH AS BRAKING, TURNING, OR ACCELERATING).

#### CAUSE:

CONDITION A MAY BE CAUSED BY A FUEL TANK MIS-BUILD.

CONDITION B MAY BE CAUSED BY AN OPEN IN CIRCUIT 30/552 OR A FUEL TANK MIS-BUILD.

CONDITION C MAY BE CAUSED BY INACCURATE RESISTOR VALUES IN THE FUEL LEVEL SENSOR.

#### CORRECTION:

FOR CONDITION A -

REPLACE THE FUEL TANK WITH P/N 25663120. A NEW FUEL LEVEL SENSOR KIT CONSISTING OF THE FUEL LEVEL SENSOR AND FLOAT ARM ASSEMBLY HAS BEEN RELEASED AS P/N 25314217 AND SHOULD ALSO BE INSTALLED AT THIS TIME.

FOR CONDITION B -

- FIRST CHECK FOR AN OPEN CIRCUIT AT CONNECTOR C415 OR IN CIRCUITS 30 OR 552 BETWEEN THE SENDER AND PZM. (REFER TO SECTION 8A-51-1 OF THE SERVICE MANUAL).

- IF NO OPEN CIRCUIT IS DETECTED, THEN REPAIR AS IN CORRECTION FOR CONDITION A ABOVE.

#### IMPORTANT:

REFER TO THE APPROPRIATE SERVICE PROCEDURES IN THE SERVICE MANUAL, SECTION 6 - ENGINE CONTROLS - 4.6L, TO REPLACE THE FUEL TANK AND THE FUEL LEVEL SENSOR ASSEMBLY (NOT TO BE CONFUSED WITH THE FUEL SENDER ASSEMBLY).

FOR CONDITION C -

REPLACE FUEL LEVEL SENSOR AND FLOAT ARM ASSEMBLY ON THE FUEL SENDER ASSEMBLY WITH FUEL LEVEL SENSOR KIT, P/N 25314217.

REFER TO THE APPROPRIATE SERVICE PROCEDURE IN THE SERVICE MANUAL, SECTION 6 - ENGINE CONTROLS - 4.6L, TO REPLACE THE FUEL SENDER ASSEMBLY.

#### IMPORTANT:

ASSURE THE NEW FUEL SENDER ASSEMBLY SEAL INCLUDED IN THE PARTS KIT IS INSTALLED.

#### PARTS INFORMATION:

DESCRIPTION P/N =========== ===

FUEL TANK 25663120 FUEL LEVEL SENSOR KIT 25314217

PARTS ARE CURRENTLY AVAILABLE FROM GMSPO.

#### WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR OPERATION NUMBER: L1200 USE PUBLISHED LABOR OPERATION TIME.

FIGURES: 00 ATTACHMENTS: 00

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.

COPYRIGHT 1997 GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.