EXAMPLE:


LINE 1: Year, GM Division, Model and Body, Assembly Plant, Sequence Number

Year	GM Division	Model Series	Body Code	Assembly Plant	Sequence #
78 = 1978	1 = Chevrolet	XX = Nova XY = Nova Custom	17 = 2 door hatchback 27 = 2 door sedan 69 = 4 door sedan	T = Tarrytown, NY W = Willow Run, MI	Starts at 100001

LINE 2: Trim and Paint

Interior Trim	Seat Type	Exterior Paint (Lower/Upper)
11N = White vinyl bench 19R = Black vinyl bench 24B = Light Blue cloth bench 24D = Light Blue cloth bench 24R = Light Blue vinyl bench 44N = Dark Green vinyl bench or buckets 62B = Camel Tan cloth bench 62D = Camel Tan cloth bench 62N = Camel Tan vinyl bench or buckets 62R = Camel Tan vinyl bench 74D = Carmine cloth bench 74N = Carmine vinyl bench or buckets 74R = Carmine vinyl bench Cloth and Vinyl Usage B = Bordeau woven sport cloth D = Edinburgh woven sport cloth N = Wallaby vinyl R = Plisse vinyl 19X = Black Big Four module 24X = Light Blue Big Four module 44X = Dark Green Big Four module 62X = Camel Tan Big Four module 74X = Carmine Big Four module The 1XY27 requires a Big Four option in addition to the trim combination number. The Big Four module consists of the instrument panel, carpet, cowl kick panel, and package shelf. Examples: 11N 24X = White vinyl bench w/Blue Big Four 74D 74X = Carmine cloth bench w/Carmine Big Four	A51 = Bucket Seats A52 = Bench Seat	11 = White 15 = Silver Metallic 19 = Black 22 = Light Blue Metallic 24 = Ultramarine Blue Metallic 44 = Medium Green Metallic 48 = Dark Blue-Green Metallic 51 = Bright Yellow 61 = Camel Beige 63 = Camel Tan Metallic 67 = Saffron Metallic 69 = Dark Camel Metallic 75 = Medium Red 77 = Carmine Metallic 11T = White Vinyl Roof 15T = Silver Vinyl Roof 19T = Black Vinyl Roof 22T = Light Blue Vinyl Roof 44T = Light Green Vinyl Roof 61T = Light Camel Vinyl Roof 79T = Dark Carmine Vinyl Roof

LINE 3: Build month and week

Month	Week
01 = January 02 = February 03 = March 04 = April 05 = May 06 = June 07 = July 08 = August 09 = September 10 = October 11 = November 12 = December	A = First Week B = Second Week C = Third Week D = Fourth Week E = Fifth Week