The MIL is ON, and False DTC 32 is Set
90chevy13Number: 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.