Firebird V8-305 5.0L VIN F FI (1987)
Vehicle Speed Sensor: Technical Service Bulletins
Electrical - Revised VSS/Ignition Diagrams
Bulletin Number:
88-6-103
Reference Number:
016535
Publish Date:
9/90
Subject:
SERVICE MANUAL UPDATE - SECTION 6E1 - TO CORRECT ECM MECHANIZATION
Models
Affected:
1984-88 BONNEVILLE AND FIREBIRD MODELS WITH 5.0L (VIN G/H), 5.7L (VIN 6)
This bulletin applies to 1984-1988 5.0L (VIN H/G) and 5.7L (VIN 6) Bonneville and Firebird Carline Service Manuals. In DRIVEABILITY AND
EMISSIONS (SECTION 6E1) the ECM Wiring Diagrams may illustrate that the 439 (ignition feed) circuit is spliced to circuit 437 (vehicle speed sensor
).
Ignition voltage is not supplied to, nor is circuit 439 spliced to the vehicle speed sensor circuit (437).
