It is and it REALLY sucks! I would have loved to switch to an aftermarket EFI. My K30 would have ran so much better and I'm sure put out less emissions. One thing can can do since the GM rebuilt engine is a 1990 casting, I can switch to TBI and any legal modifications for that year truck.
thats why i always say, if it were TRULY about the environment that would be ENCOURAGED and probably have like tax credits for it. But its not about the environment, its about control. Some say "well they arent car enthusiasts or might not know if it" they are a government board thats entire JOB is about emissions and the environment, if they dont know that means epic fail taxpayers, if they know it means they are malicious enough to not allow modifications that make cars CLEANER.
Looks like I'm a little late to the party but here's some info we all can use. Autozone has an extensive library of vacuum diagrams and other repair info. Log in and look for repair guides, then fill in the relevant info. It's all free and was a huge help in getting my 77 C10 smogged. Also, having been on the smog merry-go-round, you don't need an actual smog sticker on the truck. Your smog guy will have the diagram in one of his massive reference books. Just make sure your hose routing is correct and you're golden.
Bump. I would also like to know the name of that reference book and where I might access one. I have never been able to find an emissions label for my ‘75 GMC K25 with 8400 GVW, and it would be good to have one if I want to run regular license plates instead of antique plates. For regular emissions I just need to pass visual inspection by the gas station inspection guy, but I’d like a reference to work from. Bruce
I found a link to an 85' 6.2, I started clicking on the small page to the left, but this particular catalog starts with 1985, so I couldn't go further back. Look at part number 23500264. It is for a C30 with a 6.2. Looking a few numbers lower, you will see 14073731. That is for a C/K10 with a 6.2 and California emissions. I don't know if it is the actual emissions tag, but other underhood labels. I got lucky in my case as I still had the label. If you just put in gmpartswiki.com you can fill in some search parameters to narrow down what you're looking for. http://www.gmpartswiki.com/getpage?pageid=61441 http://www.gmpartswiki.com/query
Ahh, gotcha. I'll look into it. Mostly what I need to know is Would the 1982 C/K10 Emissions label (top right) be XHA, CYF, CBM, I think all correspond to which Application it's in and also VIN. P.s Mine is an MD-8 (700r4) Transmission with an NP208 T-Case. I do know for a fact 4-5 Letters/Numbers on the Top LH side where it would show Example "CBM - 6.2 Liter *C1G2.2k7224X" Also Matches with your VIN Tag on the cab Which also The Front Cross member & Top Drivers side frame rail should match with All of the above things i just mentioned. On a Showroom new Restoration, I find it, a big deal. Even once the truck is finished I'm sure I'll be looking still. As of Right now my Complete Frame is all NOS parts. Front to Back. Axle Seals/Bearings would be kinda tough to find so probably going the best aftermarket brand i can get. Since i don't have my label. I wonder if the GM Media Archive would be able to supply it with the "Info Build sheet" Packets???
It seems all the labels have a 2 or 3 letter code in the upper left, engine size on the next 1-2 lines, and then another code. It might be formatted like this WJ 350 cu. in. 4 bbl. carb GM 104 In some cases the label may also have the word catalyst or AIR, and at the bottom it states that it “ conforms to model year 1973 ...” Has anyone run across a reference for the codes on the label? It seems that the first step is to look up the vehicle and year by VIN, and then get the right code. For example, if I was in California and had to go to an emissions referee, wouldn’t that person need have a book with the codes? Bruce
