Chevy Trailblazer Cruise Control Not Working – How To Fix

By Max Anthony •  Updated: 12/18/22 •  3 min read

Chevy Trailblazer Cruise Control Not Working

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Cruise controls are very useful on a highway or on a longer drive. By relaxing your brakes and stopping your vehicle before it reaches a certain speed, the driver will be able to avoid accidents. Some cars have advanced features that allow you to keep a safe distance from the vehicle in front of you. When the cruise controls stop working, it is irritating; but if the control stops working completely, it can be very unsafe. Sudden cruise control that will not work, resulting in your vehicle’s rapid deceleration. Even if cruise controls are turned on, it is useful to stay alert.

Causes of Chevy Trailblazer Cruise Control Not Working

Bad Fuse

Like most electronic systems, if you feel a short circuit in one of your systems, the cruise control system will blow a fuse to prevent further damage. When a fuse blows on the cruise control, the cruise control will stop functioning completely.

Brake Pedal Switch Failure

Normally cruise controls are turned off when the accelerator is pushed down on the brake pedal, so the cruise controls are wired to the brake pedal switch. If this switch on the car’s brakes does not work, it may be as though the car is actually having difficulty braking, and does not automatically engage the cruise control system.

Failing Speed Sensor

A vehicle has several speed sensors which allow the driver to control the engine and display its current speed, as well as control the flow of ignition and fuel timing. If a speed control sensor on your car malfunctions, the cruise control will not work. You might also find that your speedometer stops functioning or that your engine has more trouble when it is idle.

How to Fix Chevy Trailblazer Cruise Control Not Working

You will need a technician to visit you to find out the reason your vehicle’s cruise control system has suddenly ceased to work. The technician will perform a thorough inspection of the system and determine the cost of any necessary repairs.

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The first step is to find out how to read the code in the vehicle’s ECU. If the codes are read, the technician will try to figure out what might be the reason for the problem.

If a fuse is bad, the auto mechanic will try to remove it by finding the fuse for the cruise control system. If a fuse blows, the mechanic will need to take it out and install a new one with a rating of a proper current.

If a mechanic suspects that a brake pedal switch has broken, he/she will look at the switch to see if there is any damage that is only apparent. The technician should check the wiring attached to the switch to make sure that everything is functioning properly. When a switch is installed, the mechanic must check that both the cruise control system and the brake lights are functioning correctly.

To look at the sensors, the mechanic will need to get under the car. When the auto mechanic gets under the vehicle, he will find the speed sensor and check it to see if it is damaged, and if it is, he/she will try to replace it. Then he/she will adjust the pressure sensor in the car and test whether the wires that connect the pressure sensor to the speedometer or cruise control are still intact.

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Max Anthony

Max is a gizmo-savvy guy, who has a tendency to get pulled into the nitty gritty details of technology and cars. He attended UT Austin, where he studied Information Science. He’s married and has three kids, one dog and a GMC truck and a Porsche 911. With a large family, he still finds time to share tips and tricks on cars, trucks and more.

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