2010 Chevrolet Cobalt Owner's Manual - Page 318

Headlamp aiming is done with the vehicle's low-beam headlamps. The high-beam headlamps will be correctly aimed if the low-beam headlamps are aimed properly. To adjust the vertical aim on the headlamps: 1. Open the hood. See Hood Release on page 6‑13. 3. At the wall, measure from the ground upward (A) to the recorded distance from Step 2 and mark it. 4. Draw or tape a horizontal line (B) on the wall the width of the vehicle at the height of the mark in Step 3. 2. Record the distance from the ground to the aim dot on the low-beam headlamp. Notice: Do not cover a headlamp to improve beam cut-off when aiming. Covering a headlamp may cause excessive heat build-up which may cause damage to the headlamp. 5. Turn on the low-beam headlamps and place a piece of cardboard in front of the headlamp not being adjusted. Do not place it directly on the headlamp. This allows only the beam of light from the headlamp being adjusted to be seen on the flat surface. 6-46