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We cover three LaCrosse generations. The first (2005 to 2009) uses 3.8- and 3.6-liter V6 engines. The second (2010 to 2016) offers a 2.4-liter with eAssist mild hybrid and a 3.6 V6. The third (2017 to 2019) uses a 3.6 V6 with an 8- or 9-speed automatic.


The 2008 Buick LaCrosse belongs to the first-generation LaCrosse, built for model years 2005–2009. Most procedures are shared with the other years of this generation, but engines, options and wiring changed from year to year, so the manual is made for the 2008 model year.
Check the model year on your VIN: on a 2008 vehicle the 10th character of the 17-digit VIN is “8”. Vehicles built for North America always carry the model year in that position; on some European or Australian vehicles it may be left unused, so in that case go by the registration papers or the build plate.
At about 18 years old, a 2008 vehicle is in the age range where wiring, rubber hoses, seals and corrosion repairs take most of the work, and where original factory information is hardest to find.
Same generation: 2005 Buick LaCrosse, 2006 Buick LaCrosse, 2007 Buick LaCrosse, 2009 Buick LaCrosse.
All Buick LaCrosse model years: 2005 · 2006 · 2007 · 2008 · 2009 · 2010 · 2011 · 2012 · 2013 · 2014 · 2015 · 2016 · 2017 · 2018 · 2019
Engine
2.8L
3.0L
3.2L
3.6L
3.8L
4.8L
5.3L
6.0L
6.2L
7.0L
Transmission
Automatic Transaxle - 4T65-E
