How To Adjust Headlights On Chevy Trucks? (Full Guide)

No matter which models from whichever year of Chevy truck you are using, there are no alternatives to having a properly installed headlight for the best possible truck safety.

So how to adjust the headlights on your Chevy truck? Well, while the process is practical, it isn’t anything too complicated. With the right tools and procedures, you will be able to fix your headlight in no time.  

That said, if you are looking for the proper way to adjust the headlights on your Chevy truck, you are in the right place to do so. Scroll down below and keep reading patiently. You will get your answers soon!

How Do I Know If My Chevy Headlights Need Adjustment?

While the entire light bulb might need to be replaced with certain issues, if the problem isn’t a great deal, you can only alter the headlight or its bulbs to meet the right power output.

Below, we have compiled some of the major symptoms that you can find to be associated with faulty headlights. 

Dim Lights

One of the most common problems that arise from faulty chevy headlights is lights that start to dim with no previous warnings. 

While broken bulbs are the cause of this most of the time, misplacement or misposition are also common causes. In such cases, you can simply open the headlight cover and correct the positioning of the bulb.

Headlight Flickering On and Off

Sometimes, truck headlights might not work the way you want them to. They might flicker persistently without settling down. 

While there are various explanations for this problem, connection troubles may be the most common. 

Headlight stopped working

If your headlight stops working at all, it is quite obvious that there is a problem, whether it is with the bulb or the connection instead. 

You should check on the specific problem instead of relying on the visual sight before deciding how to tackle this issue. As the shelf life of your headlight depreciates, headlights may stop working as well.

How Do Headlights Go Out Of Adjustment?

There are several reasons that can cause your Chevys headlights to get out of adjustment. While they are clearly minor issues most of the time, you might still need to be well prepared beforehand to take care of them.

We have listed some of these issues that can cause your trucks headlights to get out of adjustment along with their details below:

Internal Parts Can Break

The internal components that constitute the headlight are usually very fragile. They are joined together loosely with simple adjustment screws and are often made from plastic. 

That is why it is quite easy for the internals to break. Even if you do not notice any external cracks, the small bulbs might have broken components on the inside.

Impairment of the Headlight Levelings

The beams of a headlight are positioned to move conveniently in accordance with whether the driver uses a manual dial or wheel on the dashboard.

Unfortunately, these contact mechanisms are fragile, and a slight bad contact can cause the headlights to have faulty levelings. 

Accidental Setting Manipulation

Not many drivers know how to operate truck headlights due to the complexity surrounding the mechanism.  

Most often, these drivers will get curious and try to change the setting. In the process, the default setting might be altered to the wrong position.     

Tools and Materials You’ll Need to Adjust Your Headlights 

If you want to align your truck’s headlights for perfect adjustment, there are quite a lot of tools involved in the process. However, do note that you won’t be required to use all of them and can also use alternatives as well.

Some of these tools that can be used for adjustment are mentioned below:

  • Screwdriver
  • Measuring Tape
  • Cardboard or Fabric That Can Block The Light
  • Masking Tape
  • A Lot Of Space And Wall For Support
  • Markers

How To Adjust Headlights On Chevy Trucks?

Now that we are done with the major items that you will require for the task and the visual symptoms to identify the problem, we can move on to addressing this issue now. 

Follow the step-by-step guide below to adjust your Chevy lights with the least effort but for the most effective method. 

Step 1: Preparations

The first step involves certain preparations where you need to prepare the car. Make sure that the tires of the truck are filled with the right amount of air, and the tank is at least half full. 

Step 2: Locate The Axis Connecting The Headlight

Before you can adjust the headlight, you need to locate the axis of the headlight. You can make use of temporary markers that do not leave permanent spots to mark the axis or the center of the light beam.

Step 3: Park The Vehicle

Park the truck in a well-lit and spaced garage with its back at least 25 meters in front of a wall. Use a tape measure to ensure integrity.

Remove the headlight cover and the trim rings. Locate the adjustment screws and remove them using your screwdriver. Block one of the lights from the headlight using cardboards if required.

Step 4: Adjust Both Fields

Have an assistant help you out by flashing the headlights against the wall. Check whether the extremes hit. Use tapes to mark the points of light contact. 

Adjust the headlights and their screws until the lights fall on the proper range.

Step 5: Test Drive

Reassemble the parts that you have opened previously, then go for a test drive. Check whether the lights have been adjusted properly. 

If they aren’t, go back to the same room with the same wall to adjust the headlights again. 


This adjustment task may be too difficult for some folks. If you’re someone who doesn’t want to spend a lot of time and effort trying to figure out how to do something, hiring a mechanic is a preferable option.  

However, never delay fixing the headlights of your Chevy truck.  An unaligned headlight can often be the source of a major road accident. An exceptional headlight is a necessity to avoid such situations.

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