2015 Buick LaCrosse TSB 10139389

Buick TSB #PIP4919D

2015 Buick LaCrosse

TSB Document:

Affected Component: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM

Summary
This Preliminary Information communication provides information to the technician about vehicle that may have black smoke on a cold start. A dual-pulse injection strategy is utilized during engine cold start to reduce the time required to bring the catalytic converter up to operating temperature. This split injection strategy lasts for about 60 seconds on cold start. This process may cause the customer to see increased black smoke during cold start and should be considered normal.

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Date Published
MAR 30, 2015
NHTSA TSB #
10139389
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