This bulletin applies to 2002-2014 Cadillac Escalade vehicles in addition to a number of 2002-2018 GM vehicles. Some customers may note that an engine oil leak is noticed shortly after a cold start when low ambient temperatures are present (approximately below 10 degrees F) or after excessive short trip drive cycles. If an oil leak from the rear main seal is noticed, this may be the result of a frozen PCV system and excessive crankcase pressure. If this concern is encountered, clean the area of the oil leak and dry the PCV hoses and replace the oil fill cap with P/N 12589430 (vented oil fill cap) to prevent a reoccurrence.
About the Author
Information courtesy of Mitchell 1
Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.
Mike Mavrigian
Motor Age Editor
Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety of specialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.