chevrolet Workshop Repair Guides

Chevrolet Workshop Service and Repair Manuals

All Other Service Bulletins for Thermostatic Air Cleaner Actuator: > < A/T - Lack of Power At Highway Speeds, 4L80E in Hot Mode|Page 3983
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Install MEMCAL per charts for corrections 1-3.

1.

Transmission hot mode entry temperature raised from 252 degrees F to 270 degrees F.

2.

Engine decel fuel calibration revised.

3.

Engine idle revised from open loop to closed loop.

4.

Check Thermac door in air cleaner for correct operation. Door must open and close freely with no sticking or binding.

Part Availability:

Parts are currently available from GMSPO.

Labor Operation:
T0500 - MEMCAL

Labor Time:
0.6 Hr. on C/K, RN, and P models 
0.5 Hr. on G models

All Other Service Bulletins for Thermostatic Air Cleaner Actuator: > < A/T - Lack of Power At Highway Speeds, 4L80E in Hot Mode|Page 3983