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Remove several of the plastic fasteners holding the carpet to the inside of the lid. Gently force the carpet over the trunk latch assembly. Located under the carpet are ten (10) 10mm nuts holding the lamp assembly in place.
The whole light/license plate recess assembly will come off. You may want to replace ALL the bulbs now instead of later. Two each of: Sylvania 7528 (P21/5W), Sylvania 3157LL, and Sylvania 194LL.
 

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2005 Escalade 6.0L 2WD, 2007 Jeep Grand Cherokee Limited CRD
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Re: How to Change the trunk lid bulbs on a 2003 Seville STS:

I had one bulb go out on my 2000 STS a couple of years ago. And I did what you suggested, and replaced ALL the bulbs, so I wouldn't have to tear that all apart again! :)
 

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2001 (Seville) STS
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Re: How to Change the trunk lid bulbs on a 2003 Seville STS:

Remove several of the plastic fasteners holding the carpet to the inside of the lid. Gently force the carpet over the trunk latch assembly. Located under the carpet are ten (10) 10mm nuts holding the lamp assembly in place.
The whole light/license plate recess assembly will come off. You may want to replace ALL the bulbs now instead of later. Two each of: Sylvania 7528 (P21/5W), Sylvania 3157LL, and Sylvania 194LL.
Hi

I found 11 -10mm Bolts. and Lamp # 194. 1157 and 3157LL
 

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2001 (Seville) STS
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Re: How to Change the trunk lid bulbs on a 2003 Seville STS:

Hi

I changed all my tail lamps today. I also changed the License Plate lamps. I found 11-10mm bolts. holding the Trunk Light Section.
All went as Planed . Used 194 Four Total. 1157 Two Total and 3157 Two Total.

Thanks For everyones Help.

Now on to Fixing the 3rd Brake Light.It is all out. I was told to check the wire routed by the Drivers Side Trunk Hing.
 
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