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Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-7707485) -
2015 - CRC - 10/31/14
Technical Data 12-3
Engine Specifications
Engine VIN Code Spark Plug Gap
3.6L V6 Engine (LF3) 8 0.75–0.90 mm
(0.030–.035 in)
3.6L V6 Engine (LFX) 3 0.95–1.10 mm
(0.037–.043 in)