SMU-SEC.6E-ENG.CONTROLS REV. FUEL PRESSURE. Cadillac Seville 1998

SUBJECT: SERVICE MANUAL UPDATE - SECTION 6E - ENGINE CONTROLS REVISED FUEL PRESSURE GAUGE READINGS

MODELS: 1998 CADILLAC CONCOURS, DEVILLE, ELDORADO, SEVILLE 1998 OLDSMOBILE AURORA WITH 4.0L, 4.6L ENGINE (VINS C, Y, 9 - RPOS L47, LD8, L37)

THIS BULLETIN IS BEING ISSUED TO REVISE THE FUEL PRESSURE GAUGE READINGS IN SECTION 6 OF THE SERVICE MANUAL.

THE CORRECT FUEL PRESSURE SPECIFICATION FOR THE 4.0L AND 4.6L ENGINES (RPOS L47, LD8 AND L37) IS 331 TO 380 KPA (48 TO 55 PSI.). PLEASE MAKE THE CHANGES OUTLINED BELOW IN THE FOLLOWING 1998 SERVICE MANUALS:

* E/KSP PLATFORM, VOLUME 3 OF 3 (GMP/98-EKS-3), PAGES 6-716 TO 6-724 * G PLATFORM, VOLUME 3 OF 3 (GMP/98-G-3), PAGES 6-1506 TO 6-1513 * K PLATFORM, VOLUME 3 OF 3 (GMP/98-K-3P), PAGES 6-777 TO 6-784

**FUEL SYSTEM PRESSURE TEST - TEST DESCRIPTIONS**

STEP 2 SHOULD READ 331 TO 380 KPA (48 TO 55 PSI.) STEP 12 SHOULD READ ABOVE 380 KPA (55 PSI.) STEP 15 SHOULD READ BELOW 331 KPA (48 PSI.) STEP 16 SHOULD READ ABOVE 380 KPA (55 PSI.)

**FUEL SYSTEM PRESSURE TEST DIAGNOSTIC TABLE**

STEP 2 SHOULD READ 331 TO 380 KPA (48 TO 55 PSI.) STEP 12 SHOULD READ ABOVE 380 KPA (55 PSI.) STEP 13 SHOULD READ 331 TO 380 KPA (48 TO 55 PSI.) STEP 16 SHOULD READ 331 TO 380 KPA (48 TO 55 PSI.) STEP 25 SHOULD READ 331 TO 380 KPA (48 TO 55 PSI.)

**FUEL INJECTOR BALANCE TEST DIAGNOSTIC TABLE**

STEP 5 SHOULD READ 331 TO 380 KPA (48 TO 55 PSI.)

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.