Cadillac Repair Questions? Ask a Mechanic for Answers ASAP
Hi and welcome to Just Answer! When you installed the new battery, did you insure that the battery terminals were both tight and that the battery cables were in good condition? Sounds like there is a battery/ electrical system issue.
Please let me know what you find, I will here to answer any further questions.
If the battery tests good, check the cables and connections. also check the alternator
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Were you able to get it figured out? Please let me know if you need any more help!