PROM - False Codes 32/45/Service Engine Soon Light

Number: 89-158-6E

Section: 6E

Date: June, 1989

Subject:
FALSE "SERVICE ENGINE SOON" LIGHT

Model and Year:
1989 C,K R, V, G TRUCKS WITH 5.0L (VIN CODE H) OR 5.7L (VIN CODE K)
ENGINE

TO: ALL CHEVROLET DEALERS











Some 1989 C/K, R/V, & G model trucks with TBI engines may experience a False "Service Engine Soon" Light. If Code 32 (EGR Diagnostic) or Code 45 (02 Sensor Rich) cannot be repaired using normal service procedures, a revised calibration PROM should be installed (see chart).

IMPORTANT:
These new PROMS are for light duty emissions vehicles only (UNDER 8500 LBS. GVW).

Labor Operation Number: T0500
Labor Time: .6 HR. C/K/R/V MODELS
.7 HR. G MODELS