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 MANUALSCHEVROLET1999ASTRO VAN 2WD V6-4.3L VIN WREPAIR AND DIAGNOSISCRUISE CONTROLDESCRIPTION AND OPERATIONMULTI-FUNCTION LEVERTHE COAST (TRIM) FUNCTION
1999 Chevrolet Astro Van 2WD V6-4.3L VIN W
The COAST (Trim) Function
1999 Chevrolet Astro Van 2WD V6-4.3L VIN WSECTION The COAST (Trim) Function
Use the COAST/TRIM function in order to raise or lower the cruise control speed. Use the COAST (Trim) function in the following manner to increase the vehicle speed:
1. Accelerate the vehicle to a higher speed.
2. Fully depress the SET/COAST button. The VCM will release the previously set speed.
3. Release the SET/COAST button. The cruise control is now set at the higher speed.
Use the COAST (Trim) function as follows in order to decrease the vehicle speed:
1. Fully depress the SET/COAST button to disengage the cruise control system.
2. Allow the vehicle to slow to the desired speed.
3. Release the SET/COAST button. The cruise control is now reset at the lower speed.
1. Accelerate the vehicle to a higher speed.
2. Fully depress the SET/COAST button. The VCM will release the previously set speed.
3. Release the SET/COAST button. The cruise control is now set at the higher speed.
Use the COAST (Trim) function as follows in order to decrease the vehicle speed:
1. Fully depress the SET/COAST button to disengage the cruise control system.
2. Allow the vehicle to slow to the desired speed.
3. Release the SET/COAST button. The cruise control is now reset at the lower 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.