For 1990-2009 cars

# SMU - SECTION 6E3 - REV. DTC 63/P1558 CRUISE SYS. CHART

REVISION: 06/23/94

#### THIS BULLETIN IS BEING REVISED TO CHANGE THE ART.

#### SUBJECT: SERVICE MANUAL UPDATE-SECTION 6E3-REVISED DTC 63/P1558 CRUISE SYSTEM PROBLEM (SPS INDICATED LOW) CHART

#### MODELS: 1992-94 BUICK PARK AVENUE, LESABRE 1992-94 CHEVROLET LUMINA APV 1992-94 OLDSMOBILE NINETY EIGHT, SILHOUETTE 1993-94 OLDSMOBILE EIGHTY EIGHT 1992-94 PONTIAC BONNEVILLE, TRANS SPORT WITH 3800 ENGINE VIN L (RPO L27) AND VIN 1 (RPO L67)

THIS BULLETIN UPDATES THE DTC 63/P1558 CRUISE SYSTEM PROBLEM (SPS INDICATED LOW) CHART. THIS CHART ADDRESSES THE POSSIBILITY OF THE CRUISE CONTROL BRAKE SWITCH INTERNAL RESISTANCE BEING HIGH ENOUGH TO CAUSE AN INOPERATIVE CRUISE CONTROL SYSTEM, BUT STILL SHOW CORRECT OPERATION ON THE TECH 1. THIS CONDITION MAY NOT SET DIAGNOSTIC TROUBLE CODE P1567 (CRUISE SWITCHES CIRCUIT). THIS UPDATED CHART SHOULD BE USED IN PLACE OF DTC 63 IN 1992-93 SERVICE MANUALS AND DTC P1558 IN 1994 SERVICE MANUALS. REFER TO SERVICE MANUAL TABLE OF CONTENTS FOR DTC USAGE AND PAGE NUMBERS.

FIGURES: 00 ATTACHMENTS: 01

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 1994 GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.