C 3500 Truck 2WD V8-454 7.4L (1990)
PROM - Programmable Read Only Memory: Customer Interest
The MIL is ON, and False DTC 32 is Set
Number:
90-207-6E
Section:
6E
Date:
April 1990
Corp. Bulletin No.: 036505
Subject:
SERVICE ENGINE SOON LIGHT FALSE CODE 32
Model and Year:
1990 C1 (SS ONLY) TRUCK WITH 7.4L (VIN CODE N) ENGINE
Owners of some 1990 Chevrolet "SS" trucks with 7.4L TBI engine may experience a false "Service Engine Soon" light.
This condition may be the result of the engine calibration.
If Code 32 (EGR diagnostic) cannot be repaired using normal service procedures, a revised calibration PROM should be installed.
New PROM
Broadcast
Scan
Transmission
Kit Number
Code
Tool I.D.
Automatic
16151508
AUMU
1281
Part is currently available from GMSPO.
Use Labor Operation # T0500. Use Labor Time of .6 hr.
