Breaking Down the Service Parts
Identification Label (SPI)
Better Known As The Trunk ID Labell
Signed by Molly himself in permanent marker.
Don’t miss out on getting this weath of information with a bit of Grand National History.
Sample from booklet:
On the cover is and actual photo of the service identification label (SPI) from the inside of the trunk lid from my 1987 Buick Regal Turbo-T. The first thing you may notice is how dark the numbers are. In many cases your codes may not appear that dark depending on if whatever process Buick used kept up with the ink in their label machine. If you have a 1986 and earlier Turbo Regal it should have some sort of clear coating over the label. From what I have seen over the years even though all these cars were produced in the same plant, they appeared to be no set position for this label on the inside of the trunk lid.
The next thing you may notice is my car has very few codes 13 rows containing just 4 codes per row for a total of 52 codes. Most Turbo Regals especiall the Grand National models will have between 75 and 85 codes. The most codes I am aware of is 98 codes. Keep in mind codes refer to more than just options related to the car. Example, the rear will have several codes referring to the ring size, gear size,posi, ect.
THIS IS VERY INFORMATIONAL AND HELPFUL TO ANYONE WANTING TO KNOW MORE ABOUT THEIR CAR.