1988 Regals

Some 1988 Regals assembled prior to VIN J1421781 may exhibit an increased level of fuel pump noise audible in the vehicle passenger compartment.

This condition may be addressed by installing a new fuel pump with a contained check valve feature (CCV) and new tank to underbody insulator pads that have been released as an interim production change.

Service procedure and parts available from GMSPO are indicated below:

FIGURE 7:

Service Procedure

1. Drain and lower fuel tank following applicable shop manual procedures.

2. Remove fuel tank sender and pump assembly.

3. Remove existing anti-squeak material from tank and discard. Clean top of tank.

4. Position and secure eight (8) insulator pads, Part Number 10114724, to the top of fuel tank as shown in Figure 7.

5. Remove fuel pump from sender assembly and discard.

FIGURE 1:

FIGURE 8:

6. Inspect pulsator to ensure it is of the latest design with double convexed metal cover (See Figure 1). If not this style, discard and replace with Part Number 25094266, making sure to maintain a minimum 1/4" gap between pump discharge port and sender feed pipe (See Figure 8).

7. Reassemble sender/pump assembly utilizing new fuel pump contained in fuel pump kit, Part Number 25116156.

8. Install sender/pump assembly into fuel tank utilizing new fuel sender O-Ring contained in fuel pump kit.
9. Inspect tank assembly to ensure fuel and vapor pipes are properly positioned and retained in fuel line separators/spacers. When properly installed, separators/spacers should contact tank top while clearance is maintained between pipes and tank.

10. Raise and position fuel tank to vehicle underbody and secure in position, torquing strap bolts to 25 ft.lbs.

11. Inspect and correct any obvious tank or sender pipe(s) contact with vehicle underbody.

12. Reconnect fuel/vapor hoses and electrical connector.

13. Start vehicle, inspect for any fuel leakage and repair, as required.
Part Description Part Number

Fuel Pump Kit 25116156
Insulator Pad Unit (8 pcs/unit) 10114724
Pulsator *25094266

* Only required when existing pulsator is of old style (reference Step 6).

Parts are currently available from GMSPO.

WARRANTY INFORMATION

Labor Operation Number: T1324
Labor Time: 1.1 Hours
Trouble Code: 92