gmc Workshop Repair Guides

GMC Workshop Service and Repair Manuals

Initial Inspection and Diagnostic Overview|Page 12130 > < Initial Inspection and Diagnostic Overview|Page 12128
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Steps 1 - 7

Cruise Control - Inoperative/Malfunctioning

CRUISE CONTROL INOPERATIVE/MALFUNCTIONING

DIAGNOSTIC AIDS

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Inspect for proper operation of the stop lamps.

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Ensure that the following cruise control switches are not stuck or sticking in the engaged position:
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Set/Coast

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Resume/Accel

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For an intermittent condition, refer to Diagnostic Aids for Circuit Testing and Wiring Repair procedures.

CONDITIONS FOR ENABLING CRUISE CONTROL

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The vehicle speed is greater than 40 km/h (25 mph).

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The vehicle is not in PARK, REVERSE, NEUTRAL, or 1st gear.

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The system voltage is between 12-16 volts.

TEST

Initial Inspection and Diagnostic Overview|Page 12130 > < Initial Inspection and Diagnostic Overview|Page 12128