Service Procedure

INSPECTION FOR CLEARANCE

1. RAISE THE VEHICLE AND SUITABLY SUPPORT.

2. LOCATE THE AREA WHERE THE UPPER FORWARD IN BOARD SURFACE OF THE FUEL TANK MAY CONTACT THE UNDER BODY OF THE VEHICLE.

3. UTILIZING THE TUBING AS A GAUGING/MEASURING DEVICE, PROBE BETWEEN THE FUEL TANK AND THE UNDERBODY IN THE AREA OF MINIMUM CLEARANCE.

- IF THE TUBING CAN BE INSERTED INTO THE AREA, INDICATING A CLEARANCE OF AT LEAST 5 MM EXISTS BETWEEN THE TANK AND THE UNDERBODY, NO FURTHER ACTION Is REQUIRED. LOWER THE VEHICLE AND INSTALL THE GM CAMPAIGN IDENTIFICATION LABEL

- IF THE TUBING CANNOT BE INSERTED PROCEED TO STEP 4.

4. SUPPORT THE FUEL TANK. REMOVE THE FRONT FUEL TANK STRAP ATTACHING BOLT AND BACK OFF REAR STRAP ATTACHING BOLT FIVE (5) REVOLUTIONS, APPROXIMATELY 12.7 MM (1/2").

5. CAREFULLY LOWER TANK TO PROVIDE ACCESS TO VISUALLY INSPECT FOR TANK TO UNDERBODY CONTACT.

- IF THERE ARE NO SIGNS OF WEAR, PROCEED TO INSTALL FUEL TANK SPACER PROCEDURE.

- IF THERE ARE SIGNS OF WEAR, PROCEED TO INSTALL FUEL TANK PROCEDURE.

INSTALL FUEL TANK SPACER

1. FROM THE INBOARD SIDE OF THE FUEL TANK, SLIDE THE TANK SPACER BETWEEN THE FUEL TANK AND THE UNDERBODY FRONT CROSSMEMBER.

IMPORTANT:
THE INSULATOR (ITEM 2) WILL BE ATTACHED TO EITHER THE CROSSMEMBER OR THE FUEL TANK. DO NOT ATTEMPT TO REMOVE OR REPOSITION THE INSULATOR.

2. CAREFULLY RAISE THE FUEL TANK. POSITION THE FRONT FUEL TANK STRAP AND HAND START THE ATTACHING BOLT.

3. TORQUE THE FUEL TANK STRAP ATTACHING BOLTS TO 12 NM (106 IN. LBS.).

4. LOWER THE VEHICLE.

5. INSTALL THE GM CAMPAIGN IDENTIFICATION LABEL.

INSTALL NEW FUEL TANK

1. INSTALL A NEW FUEL TANK FOLLOWING THE PROCEDURE IN THE APPLICABLE SERVICE MANUAL SECTION 6, ENGINE, SUB-SECTION, DRIVEABILITY AND EMISSIONS (1995) OR ENGINE CONTROLS (1996-98).

IMPORTANT:
THE NEW FUEL TANK WILL NOT REQUIRE A SPACER.

2. INSTALL THE GM CAMPAIGN IDENTIFICATION LABEL.