Cruise Control - DTC 63/P1558 (SPS Indicated Low) Chart
Group Ref.: 6E - Engine Fuel & EmissionBulletin No.: 416509A
Date: June, 1994
SERVICE MANUAL UPDATE
SUBJECT:
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 IS BEING REVISED TO CHANGE THE ART. PLEASE DISCARD BULLETIN 416509. (GROUP REFERENCE 6E - ENGINE FUEL & EMISSION)
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.