The bulbs screw in from the rear. If you can't get to the back, take the light assy off of the car.
when you open the hood of the car there are two square plastic tabs on either side of the light, pull up on those (they only move 1/4 to 1/2 inch) and the headlight assembly will come out giving you access to the bulbs.
The bulbs unscrew from the back of the light assy. sometimes you have to remove it to get to the back.
You will need to take the complete headlight assembly loose or out to get to the bulb to change it.
I've got a better question, why is this question in the Chevy venture forum ?
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Pull the complete headlight assembly out to get to the bulbs. You first have to pull the front bumper off, along with the wheel well to get to the headlight assembly.
read the manual
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the horn is easier to get to,if you remove the right side headlight housing!! then you can see horn.
When you open the hood look above the headlight for two round plastic caps. Pull these upwards, it releases the light assembly.
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Remove the headlight connector from the back of your 2002 Chevy Monte Carlo headlight. Take hold of the lightbulb, push in and turn at the same time, to remove. Reverse the process to replace the new headlight.
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Bulbs are replaced from rear of headlight. See answer to similar questions for how to do.
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there are two screws holding the light assembly to the car. Remove the two and replace after removing headlight
the horns are located on the passenger side under headlight in the fender. remove the plastic panel to access them. you may have to remove wheel also.