it really depends if they pulled a p0300 or a p030X. first is random multiple misfire which you may or may not feel and the other is for an individual cylinder which you may or may not feel. i'd take it to a dealer or trusted mechanic. you could always do a little work yourself if you find out the specific code.
personally though, i'd just bring it back. could be a TSB, found this one:
Quote:
SERVICE UPDATE
Bulletin No.: 09351
Date: December 18, 2009
Subject: 09351 - Service Update for Inventory Vehicles Only - Loose Coil Ground Wire - Expires August 31, 2010
Models:
2010 Buick LaCrosse
Equipped with a V6 Engine (RPO LF1/LLT)
This service update involves vehicles in dealer inventory only and will expire August 31, 2010.
Purpose
This bulletin provides a service procedure to check the coil ground wire at two locations on certain 2010 Buick LaCrosse vehicles equipped with a V6 engine (RPO LF1/LLT). These vehicles may have a loose coil ground wire, which could cause the engine to run rough, misfire, or cause the Service Engine Soon light to illuminate or flash.
This service procedure should be completed on involved vehicles currently in dealership inventory as soon as possible but no later than August 31, 2010, at which time this bulletin will expire.
Vehicles Involved
A list of involved vehicles currently in dealer inventory is available on the "Service Update Bulletin Information" link under the "Service" tab in GM GlobalConnect (US) or attached to the GlobalConnect message (Canada).
Important
Dealers are to confirm vehicle eligibility prior to beginning repairs by using GMVIS (dealers using WINS) or the Investigate Vehicle History link (dealers using GWM). Not all vehicles within the above breakpoints may be involved.
Parts Information
No parts are required for this service update.
|