How to upgrade engine in 2003 base sedan deville
The DTS has 25 more horse power than the DHS and the DeVille. So thats 300 with the DTS vs 275 on the other two, with same mpg and such. Only a couple hundred dollar difference between the two. Trade up.
Look up `GPerformance Chip' on the internet, cost $60.00 - I put a chip in my 93 Vette and it really made a huge difference. I will probably get this chip for my 2002
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