On the drivers door sill.
Just put in
That would depend on whether it is gas or diesel. I can fax the instructions to you with the vin number of the truck.
If it's an original engine, call a GM dealership and give them the VIN number.
This link: http://www.autobaza.pl/ab/en/web/productaa0100 I used it and it worked great. << That Link will not work, a 1979 GMC/Chevy will have a 13 digit vin number which will not work at that site. Try this link > http://www.chuckschevytruckpages.com/7980VIN.html
yes
Ccu147z167100
Passenger side, even with the door lock, top of truck frame it is stamped right there you will need a mirror and a piece of sandpaper to remove rust or paint.that is one of the confidential Vin numbers
the easiest way is to use the 8th character in VIN number to find out what engine it is. another way is look under the hood, usually they put stickers that will have your vin and the engine size i.e. 4.3
It is not a very reliable truck. I would not recommend buying one.
You could do it but it would be much cheaper to just buy a good used 1990 GMC 4+4 truck and drive it.
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