Section 70 (Automatic Transmission Diagnosis - 4L80-E (Gasoline)): Description: VCM
WARNING: This page does not describe the selected car, but rather 14 other vehicles, including the 1998 GMC Savana Special, 1998 GMC Savana Camper Special, 1998 GMC Savana, 1998 Chevrolet RV Cutaway, and 1998 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
Vehicles are equipped with a Vehicle Control Module (VCM). For component locations, see VCM LOCATIONS table.
VCM LOCATIONS
| Application | Location |
|---|---|
| VCM | In Engine Compartment, On Left Fender |
VCM controls TCC, pressure control solenoid, (hydraulic pressure), PWM solenoid and shift solenoids 1-2 and 2-3. In addition, VCM also controls ignition, fuel and emission devices related to engine.
VCM receives electronic signals from sensors and switches. These signals help VCM determine when to operate various relays and solenoids related to engine and transmission components.