Vacuum Line

Asked by Oct 11, 2016 at 10:50 AM about the 2008 Cadillac CTS 3.6L DI

Question type: Maintenance & Repair

After changing the battery on a 2008 CTS I found a
vacuum line disconnected in the battery
compartment in the trunk. Where does the line
hook up?

3 Answers

16,295

It's a battery vent tube, not a vacuum line. Since the battery is now in the passenger cabin, it has to be vented. The OEM battery likely had a hole that the tube plugged into, then the vent line ran out the wheel well. Some non-OEM batteries do not have the vent hole, so the tube is not needed.

1 out of 1 people think this is helpful.
210,335

I would make sure the replacement battery Does have a vent hole, if it doesn't you got the wrong one.

1 out of 1 people think this is helpful.

Thanks to both of you. Replacement battery had the vent hole and easily hooked up the vent line.

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