Check engine light and ABS lights turned on?

2004 CADILLAC DEVILLE
145,000 MILES • V6 • 2WD • AUTOMATIC
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MAMA2LKB
  • MEMBER
  • 1 POST
When trying to shift into reverse when I apt gas after going into reverse it won't move. And if it does it doesn't go far and it makes a horrible loud clunking and boom sound and stops very hard. now it's doing the same thing while in drive but it's more when I'm slowing down it makes the loud sounds and hard stopping motion and car sounds like it's breaking. Check engine light and ABS is now on.
Dec 30, 2020 at 7:22 PM
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KASEKENNY
  • ASE Certified Mechanic
  • 18,907 POSTS
  • ASE Certified Mechanic
This sounds like an internal transmission issue but we need start from the beginning and check the codes because that will give us the best direction on where to go rather then guessing at what it could be.

Here is a guide on how to pull codes:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

https://youtu.be/ZY9IOfVDfSI

Let's get the codes and go from there.
Dec 31, 2020 at 5:48 PM
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