S15/T15 Sonoma P/U 2WD V6-262 4.3L VIN W CPI (1994)
PROM - Programmable Read Only Memory: All Technical Service Bulletins
PCM - Light Surge at Highway Speeds at Light Throttle
File In Section: 6E - Engine Fuel & Emission
Bulletin No.: 57-65-03A
Date: September, 1997
Subject:
Light Surge at Highway Speeds at Light Throttle (New Calibrations)
Models:
1994 Chevrolet and GMC Truck S/T Models
1994 Oldsmobile Bravada
with 4.3L V6 Engine (VIN W - RPO L35) and Automatic Transmission
This bulletin is being revised to change Emission Axle under S/T Utility. Please discard Corporate Bulletin Number 57-65-03 (Section 6E - Engine Fuel
& Emission).
Condition
Some owners may comment on a light highway surge condition (minor engine RPM instability). This condition may occur at highway speeds with light
throttle.
Cause
Calibration parameters not optimized for this operating condition.
Correction
If standard diagnostic procedures for the above conditions do not resolve the problem, the following calibrations (for this specific listed concern) may
resolve the problem
Parts are currently available from GMSPO.
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation
Labor Time
J6364
Use published labor operation time.
