Having problems with your 2003 Cadillac CTS ?
Trunk lid will not stay up can you help me. - 2003 Cadillac CTS
You have small struts that hold the trunk open and they do wear out over years of use, but are especially prone to not doing their job when the temperature is very cold. Those struts are not too expensive ($20-$25) and are usually pretty easy to replace.
Repair Help & Product Troubleshooting for 2003 Cadillac CTS
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