G 2500 3/4 Ton Van V6-262 4.3L VIN Z TBI (1995)
PROM - Programmable Read Only Memory: All Technical Service Bulletins
Poor Driveability Conditions and DTC 32 Set
File In Section: 6E Engine Fuel & Emission
Bulletin No.: 67-65-38A
Date: June, 1997
Subject:
DTC 32 and/or Poor Driveability Conditions
(Install New MEMCAL and Clear All DTCs) NON-OBDII VEHICLES ONLY
Models:
1995 Chevrolet and GMC C/K, S/T, M/L, G Models
with 4.3L Engine (VINs Z, W - RPOs LB4, L35) and 4L60-E Automatic Transmission (RPO M30)
This bulletin is being revised to add G Models. Please discard Corporate Bulletin Number 67-65-38 (Section 6E - Engine Fuel & Emission).
Condition
Some owners may experience EGR valve sticking or foreign material holding the EGR valve open/closed. This will cause a DTC 32 to be set, which may
be accompanied by poor driveability conditions such as engine surge, engine knock, engine stall, rough idle, and/or hard starting.
Cause
Carbon deposits or foreign material affecting EGR valve operation.
Correction
Record stored DTC's, install new MEMCAL and clear all DTC's. Choose the appropriate MEMCAL from the table listed. After installing the new
MEMCAL, perform EGR valve tests listed:
EGR Debris Purge and Function Check
