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Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by CrazeeBush, Apr 22, 2000.
I have a 1983 K5, and I was just curious as how to identify one with CA Emmisions. Just curious.
There should be a sticker in the engine compartment identifiying either Federal or California. The Vin# should also show this information.
What is in the VIN# that shows CA Emmisions?
It will show if the K5 is either a Federal, or California emission controlled vehicle.
I am sitting here looking at the VIN number breakdown in both my owners manual and the Chiltons manual, and neither stipulate anything about emissions. The Chiltons manual does however, show vacuum diagrams from under the hood that do tell you what your emissions are set for from the factory.
My 86 has a code of YDW which says it is a 305 with a 4bbl high and low altitude and export with an automatic transmission alternate. The export meaning it is not meant for Calif. The same year if it had a code of YFN it says it is a 4bbl California low altitude with auto transmission.
Now for the VIN, in 1981 they changed to a 17 digit number as follows...
first digit: Nation of Origin 1=USA 2=Canada
2nd digit : Manufacturer G=GM
3rd digit : Make and type A bus (van) B=incomplete vehicle C=truck 8=multi purpose vehicle
4th digit : GVWR/Brake System B= 3001-4000 C= 4001-5000(and so on)
5th digit : Line and chassis type C= conventional cab 4x2
K= conventional cab 4x4
P= forward control chassis 4x2
G= van, sport & cutaway 4x2
w= Elcamino 4x2
6th digit : Truck series 1=1/2 ton 2=3/4 3=1 ton
7th digit : Truck body type
1=hi cube cutaway
3=4 door cab
4=2 door cab
8th digit : Engine and codes G=305 2bbl
9th digit : is a check digit (?)
10th digit : Is the yearcode B=81 through M=91 inclusive
11th digit : is for the plant location...(ex..F=Flint)
12-17 digits: is the plant sequential number.
The preceeding is from the Chiltons Manual for Full Size Chevy Trucks 80-87
I didn't think the VIN # gave anything away about Emissions or not, b/c I was looking at that same breakdown. What about the emmision label under the hood, it there anything on there that SPECIFICALLY says "CA Emmisions"?? I did notice this note at the very bottom of my sticker.
"THIS VEHICLE CONFORMS TO U.S. EPA REGULATIONS APPLICABLE TO 1983 MODEL YEAR NEW LIGHT-DUTY TRUCKS."
Does that mean anything?
ok, I knew that the vin was questionable, so I am wrong with that one. On my 74 K5, there is a sticker in the engine compartment that shows it to be a California Emission vehicle as opposed to being a Federal.
he tag under he hood should have a code on it, again mine has a YDW. This is in the upper right hand corner of the sticker. The code on yours will tell you what the emissions were set for.
Top Left corner has "DFH" in big letters, is that the code?
That is the code, my book does not really start covering all the codes till 1984, so I cannot tell you for sure what you want to know except that is the code . You might call a GM dealer and they can tell you or some else might know where to call....
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