Yukon XL 4WD V8-5.3L (2011)
Caution: Refer to Fastener Caution See: Service Precautions/Vehicle Damage Warnings/Fastener Caution.
2. Install the platform hitch bolts to the frame rails and the rear bumper.
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Tighten the trailer hitch-to-frame bolts to 113 Nm (83 lb ft).
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Tighten the trailer hitch-to-bumper bolts to 100 Nm (74 lb ft).
3. Connect the trailer wiring harness.