Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1997ASTRO VAN 2WD V6-4.3L VIN WREPAIR AND DIAGNOSISCRUISE CONTROLDESCRIPTION AND OPERATIONGENERAL DESCRIPTIONMULTIFUNCTION LEVERSET/COAST BUTTON SWITCH
1997 Chevrolet Astro Van 2WD V6-4.3L VIN W
Set/Coast Button Switch
1997 Chevrolet Astro Van 2WD V6-4.3L VIN WSECTION Set/Coast Button Switch
The "SET/COAST" switch controls three functions.
^ The Set Function--When the "SET/COAST" switch is depressed and then released, with vehicle speed above the low speed limit point, and the "ON/OFF" switch in the "ON" position, cruise speed will be set at the particular speed the vehicle was at when the button was released. Cruise speed will be within 1.6 km/h (1 mph) of actual vehicle speed when engaged. The system will cruise until either the "ON/OFF" switch is moved to "OFF," the ignition switch is turned off, and/or the "SET/COAST' button is pushed in fully and held. Pushing the brake pedal disengages the system, but the set speed is retained in memory allowing a "RESUME" at a later time.
^ The Coast (Trim) Function--When the "SET/COAST" button switch is fully depressed, the driver can raise or lower the control speed. To increase control speed, the driver would accelerate to a new speed and fully depress the switch. The VCM releases the previously set speed. Then release the button. Upon releasing the button, a new speed is set. An increased control speed can also be more easily set by the "RESUME/ACCEL" switch as described later. To decrease cruise speed, the "SET/COAST" switch is held in (depressed position) to disengage the cruise system, and allowing the throttle to return to the idle position. When the vehicle has slowed to the desired lower cruise speed, releasing the switch will cause the system to cruise at the new speed.
^ The "TAP DOWN" Function--For this function to operate, the cruise must be engaged and operating. "TAPPING DOWN" is done by quickly pressing the "SET/COAST" button to the depressed position and quickly releasing it, or "tapping" the button. Do not hold the button in the depressed position or the system will revert to the "COAST" mode. "TAP DOWN" is a function in which cruise speed can be decreased by 1.6 km/h (1 mph) increments (one tap=1 mph decrease). The system can "TAP DOWN" to the engage speed lockout of 40 km/h (25 mph), below this speed, cruise control will not operate.
The accelerator may be depressed at any time to override the cruise system. Releasing the accelerator will return the vehicle to the previously set cruise speed.
^ The Set Function--When the "SET/COAST" switch is depressed and then released, with vehicle speed above the low speed limit point, and the "ON/OFF" switch in the "ON" position, cruise speed will be set at the particular speed the vehicle was at when the button was released. Cruise speed will be within 1.6 km/h (1 mph) of actual vehicle speed when engaged. The system will cruise until either the "ON/OFF" switch is moved to "OFF," the ignition switch is turned off, and/or the "SET/COAST' button is pushed in fully and held. Pushing the brake pedal disengages the system, but the set speed is retained in memory allowing a "RESUME" at a later time.
^ The Coast (Trim) Function--When the "SET/COAST" button switch is fully depressed, the driver can raise or lower the control speed. To increase control speed, the driver would accelerate to a new speed and fully depress the switch. The VCM releases the previously set speed. Then release the button. Upon releasing the button, a new speed is set. An increased control speed can also be more easily set by the "RESUME/ACCEL" switch as described later. To decrease cruise speed, the "SET/COAST" switch is held in (depressed position) to disengage the cruise system, and allowing the throttle to return to the idle position. When the vehicle has slowed to the desired lower cruise speed, releasing the switch will cause the system to cruise at the new speed.
^ The "TAP DOWN" Function--For this function to operate, the cruise must be engaged and operating. "TAPPING DOWN" is done by quickly pressing the "SET/COAST" button to the depressed position and quickly releasing it, or "tapping" the button. Do not hold the button in the depressed position or the system will revert to the "COAST" mode. "TAP DOWN" is a function in which cruise speed can be decreased by 1.6 km/h (1 mph) increments (one tap=1 mph decrease). The system can "TAP DOWN" to the engage speed lockout of 40 km/h (25 mph), below this speed, cruise control will not operate.
The accelerator may be depressed at any time to override the cruise system. Releasing the accelerator will return the vehicle to the previously set cruise speed.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.