Rough Caddy

Aug. 6, 2019

This bulletin applies to 2015-2018 Cadillac Escalade vehicles equipped with a 6.2L L86 (gasoline direct injection) engine. The customer may see an SES light on, possibly accompanied by a rough running engine.

 The technician may find DTC P0300 stored. If normal diagnostics do not isolate the problem, inspect for a possible terminal tension concern on both the ignition coil power feed and the X2 connector of the under hood fuse block (UBEC) for an intermittent SES traction control lamp concern and repair as necessary.