General Motors will be contacting the owners of certain 2017 Cadillac XTSs and 2017 GMC Acadias regarding a problem affecting the brake system. An investigation into the subject vehicles found that the supplier of the brake caliper assembly may have incorrectly oversized the front caliper piston bore during machining. The oversized bore could prevent proper compression, allow the seal to extrude between the piston and the bore, and could result in a brake fluid leak. Drivers may experience reduced braking and/or an illuminated brake warning light.

Dealers will inspect the front brake calipers, replacing the assemblies as necessary. Owners wanting more information about the problem are asked to contact GM customer service at 1-800-458-8006 (Cadillac), or 1-800-462-8782 (GMC). GM’s number for this recall is 16096 and the NHTSA campaign number is 16V-8020.

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