There is 4-pin wiring available for your 2017 GMC Acadia Limited, but Curt hitch # 13424 does not include the wiring.
Instead, you need the T-One Wiring Harness # 118270 which gives you a 4-flat connector allowing you to power your trailer's lights. If you are going to be towing, I recommend checking out Ball Mount Kit # 989900, which is for 2” hitches and may fulfill your towing needs in one tidy package; two ball mounts - one with a 3/4” rise or 2” drop and the other with a 2-3/4” rise... view full answer...
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