C 1500 Truck 2WD V6-262 4.3L (1989)
PROM - Programmable Read Only Memory: All Technical Service Bulletins
M/T - Idle Rise Between Shifts
GMC NUMBER:
90-6E-93
GROUP:
6E-ENGINE EMISSIONS
DATE:
SEPTEMBER, 1990
CORPORATE
NUMBER:
036512
SUBJECT:
IDLE RISE BETWEEN SHIFTS (NEW CALIBRATION PROM)
MODELS:
1989-90 4.3L C/K TRUCKS WITH MANUAL TRANSMISSION (5LM60, HM117) AND GVW LESS THAN 8500#
CONDITION:
Some owners of the above trucks equipped with manual transmissions may comment about a slight rise in engine idle speed when depressing the clutch
to shift gears.
CORRECTION:
To correct this condition a new service calibration PROM should be installed. The new calibration
SERVICE PARTS INFORMATION
APPLICATIONS: These PROMs will only function in service ECM (Electronic Control Module), P/N 1227747.
APPLICATIONS: These PROMs will only function in service ECM (Electronic Control Module), P/N 16144288.
Parts are currently available through GMSPO.
increases the rate at which Idle Air Control (IAC) counts are removed following a rapid closing of the throttle. To determine correct service PROM
usage, verify the part number of the ECM currently installed in the vehicle, and follow the appropriate chart.
WARRANTY INFORMATION
Labor Operation:
T0500
Labor Time:
.6 Hrs
NOTE:
Labor Operation is coded to base vehicle coverage in the warranty system.
