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GMC
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1987
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Magnavan 6.2 J, 400/M40
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Repair and Diagnosis
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Accessories & Equipment
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Cruise Control Systems
Cruise Control Systems
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Description
Operation
Notes
Multi-Function Control Switch
Set/Coast Switch
Notes
"SET" Mode
"COAST" Mode
"TAP DOWN" Mode
Electronic Control Module
Servo Unit
Notes
Steady Cruise State
Vehicle Losing Speed
Vehicle Gaining Speed
Speed Sensor
Electrical & Vacuum Release Switches
Adjustments
Brake/Release Switch Adjustment
Clutch/Release Switch Adjustment
Trouble Shooting
Inoperative System Electrical
Inoperative System Mechanical
Vehicle Surges Electrical
Vehicle Surges Mechanical
Cruise Set Speed High Or Low
No Resume Function
Unwanted Cruise Or Acceleration
Diagnosis & Testing
Notes
Preliminary Inspection
Cruise Control Diagnosis
Servo Resistance Test
Servo Vacuum Test
Multi-Function Control Switch Test
Control Module Voltage Check
Control Module Resistance Check