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truckster · 02-19-2013, 05:55 PM

You need level ground, a wall, and a tape measure. You should also have a full tank of gas, but that will make more of a difference in a Blazer or a Suburban than a truck, because of where the tank is located.

At 25 feet from the wall, the top cutoff of the beam should be the same height as the top of your headlight. The left cutoff should be straight ahead of the left edge of the truck. The right headlight should meet the left headlight's right cutoff. That's about all there is to it.

02-19-2013, 05:55 PM	#5
truckster Registered User Join Date: Jan 2001 Location: Orem, Utah Posts: 8,021	Re: Headlight Adjustmet "How To's" You need level ground, a wall, and a tape measure. You should also have a full tank of gas, but that will make more of a difference in a Blazer or a Suburban than a truck, because of where the tank is located. At 25 feet from the wall, the top cutoff of the beam should be the same height as the top of your headlight. The left cutoff should be straight ahead of the left edge of the truck. The right headlight should meet the left headlight's right cutoff. That's about all there is to it.