J.D. Power and Associates has released the results of its 2006 Customer Service Index Study that measures which brands have the best service departments. Not surprisingly, Lexus nabbed the top spot with a CSI score of 912. Whoa, but there's Buick right behind it with a score of 911, followed by Cadillac with 909. The bottom of the list is occupied by Isuzu with a score of 781, some 29 points below Volkswagen's 810. Of note: six out of the top ten service departments came from domestic brands.

The Customer Service Index Study measures quality of service in the areas of service initiation, service adviser, in-dealership experience, service delivery, service quality and user-friendly service. Survey responses were gathered from 79,580 owners of model year 2003 through 2005 vehicles.

(Follow the jump for the complete list)

[Source: Automotive News]

Customer Service Index Ranking
(Based on a 1,000-point scale)

Lexus - 912
Buick - 911
Cadillac - 909
Jaguar - 908
Lincoln - 906
Mercury - 905
Saturn - 904
Pontiac - 903
Audi - 890
MINI - 890
Volvo - 890
Acura - 889
Chevrolet - 887
Infiniti - 887
Porsche - 887
BMW - 884
Honda - 883
HUMMER - 882
Saab - 880
GMC - 879
IndustryAverage - 873
Mercedes-Benz - 872
Hyundai - 869
Chrysler - 867
Ford - 866
Dodge - 862
Toyota - 861
Subaru - 858
Jeep - 851
Nissan - 849
Mitsubishi - 848
Kia - 843
Mazda - 843
LandRover - 840
Suzuki - 823
Volkswagen - 810
Isuzu - 781