Check the 15 amp fuses under the hood on the right side of the engine. The 2 rear 15 amp fuses are for the left and right headlamps. You will find that 1 of the fuses has blown.
I assume you mean headlights -- is this correct? Could be a lamp going bad or a bad/dirty connection.
If these are relatively new lamps, my best guess is that there is a "dirty" connection somewhere that is preventing the required current from getting to the headlight.
If the lamps are old, the brown one could be going bad.
Maybe you could try switching the lamps and see if the brown lamp switches sides or stays where it is.
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SOURCE: MY 2003 CHEVY SUBURBAN won't crank,showup on the
bad instrument cluster to reset oil light key on press gas pedal 3 times to floor in 5 seconds
SOURCE: Changing CO2 Sensor on 2003 Chevy Suburban
check the whole exaust sestyem? there should be 4to5
SOURCE: 2003 chevy suburban has a flashing check engine
could be anything from the weird to the sublime so i couldnt evan hope to tell you unless i had the vehicle in front of me sorry
SOURCE: 2003 Chevy Suburban-replace alternator
Ok, Alternators are a breeze on these things. There are two bolts that hold it on, and 2 sets of wires. If you haven't taken anything apart yet, and the belt is still on it, here's what to do. You will want one of those rubber or elastic bungee cords, about 2 and a half feet long(this makes it easy). Hook that bungee cord to your hood somewhere, so that it hangs down. Hook the other end on the serpentine belt right next to the alternator pulley. If you need to prop the hood up with a stick or something to keep it up, do so. Pull up on the belt, and watch the pulleys. The one that probably has a plastic pulley on it that moves up and down(this is the tensioner) is the one that you'll put a deep well socket in the middle of with a ratchet, and turn counterclockwise. This will make the belt go loose. Now you can work the belt off the alternator pulley, and once you get it off, the bungee cord will keep it in place, so you don't have to look at the diagram. Otherwise, if it comes off, there is a sticker just under the hood either on the fan shroud or the radiator support that has the belt diagram. Now, you can disconnect the battery, pull the rubber boot down off the nut and post on the back of the alternator, remove the nut and wire, and then unhook the wire from the side of the alternator. Now, you can remove the two bolts that hold the alternator on. You Will need to pry the alternator off at this point, as it fits really tightly in place. A socket extension or a large flat screwdriver works really well for this. Once you get it off, put the new one on exactly as you took the old one off. Note, you will have to release your tension on the tensioner at some point; i just ease it down, or if I can pull it off, wedge it somewhere where it won't loosen very far. Remember, on the tensioner, you're not trying to take the nut off. All you're doing is using it to move the tensioner arm. That's all there is to this job. Sometimes it can be stubborn with the prying part, especially getting it into place. Hope this is what you're after, and if you need more info, leave a comment for me.
Testimonial: "Great advice on the bungee cord!! Well written advide and easy for a novice to follow. Thanks"
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it's the headlight, it's new but very dim almost brown.
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