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Discussion Starter #1
When i got off work today noticed this on the taillight, it was frosty this morning and this time of season it always is.

So it is condensate from a leak?
Just a water spot from the frost?
I have never noticed water in there and there is none in there now.
I have tons of warranty on my truck so replacing ain`t a problem!
Just don`t wanna waste my time going to the dealer if it is just a water spot.
 

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mine had that same spot, same everything. It went away like 3 minutes later though..
 

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that sucks...u probably have a crack somewhere...lets hope it goes away ahaha
 

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When i got off work today noticed this on the taillight, it was frosty this morning and this time of season it always is.

So it is condensate from a leak?
Just a water spot from the frost?
I have never noticed water in there and there is none in there now.
I have tons of warranty on my truck so replacing ain`t a problem!
Just don`t wanna waste my time going to the dealer if it is just a water spot.
slight condensation is normal. if theres water beading up or puddling up then youve got a problem.
 

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here's a direct quote from gm service info.
gmserviceinfo said:
The following information is being provided to better define the causes of condensation in exterior lamps and includes guidelines for determining the difference between a lamp with a normal atmospheric condition (condensation) and a lamp with a water leak.

Some exterior lamps, such as cornering, turn signal, backup, headlamps or tail lamps may exhibit very small droplets of water, a fine mist or white fog (condensation) on the inside of the lamp lens. This may be more noticeable on lamps with "multi-lens" designs and may be normal during certain weather conditions.

Condensation occurs when the air inside the lamp assembly, through atmospheric changes, reaches the "dew point". When this takes place, the moisture in the air within the lamp assembly condenses, creating a fine mist or white fog on the inside surface of the lamp lens.

Most exterior lamps on General Motors vehicles use a vented design and feature a replaceable bulb assembly. They are designed to remove any accumulated moisture vapor by expelling it through a vent system. The vent system operates at all times, however, it is most effective when the lamps are ON or when the vehicle is in motion. Depending on the size, shape and location of the lamp on the vehicle, and the atmospheric conditions occurring, the amount of time required to clear the lamp may vary from 2 to 6 hours.

Completely sealed headlamp assemblies (sealed beams) are still used on a limited number of models being manufactured today. These lamps require the replacement of the complete lamp assembly if a bulb filament burns out.

A Fine Mist or White Fog on the Inside Surface of the Lamp Lens Occurring After a Period of High Humidity
• May be located primarily in the lens corners (near the vents) and SHOULD NOT cover more than half the lens surface.

• The condition should clear of moisture when the vehicle is parked in a dry environment, or when the vehicle is driven with the lights ON.

• A comparison of the equivalent lamp on the opposing side of the vehicle indicates a SIMILAR performance.

If the above conditions are noted, the customer should be advised that replacement of a lamp assembly may not correct this condition.


Numerous & Various Size Drops of Water Collecting on the Inside Surface of the Lamp Lens After the Vehicle Has Been Exposed to Rain or a Car Washing Environment
• A condition that covers more than half the surface of the lamp lens.

• An accumulation of water in the bottom of the lamp assembly.

• A condition that WON'T clear when the vehicle is parked in a dry environment, or when the vehicle is driven with the lights ON.

• A comparison of the equivalent lamp on the opposing side of the vehicle indicates a different performance.

Any of the above conditions would indicate the need to service the lens or lamp assembly.
 

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mine have done it since i have had the truck..
 

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Discussion Starter #11
Hey thanks GoToJay i will follow the service info. Today the spot cleared up bounced the truck up n down to see if water was in there, none in there and no sign of dripping i think i will be ok i will keep my eye on it time to time.
 
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