One can find info on reliable NAPA parts by going into a NAPA parts store and speaking with an associate who is knowledgeable in the aforementioned parts.
any parts store(napa ,advance auto.... sell tech manuals for around 20.00 and have all your info in it
http://laurencoodley.com/sodasprings.html
Go to NAPA and buy a repair manual for your specific car.
Simply phone your automotive parts recycler aka junkyard and give them all info regarding your vehicle. Internet / craigslist etc. or yellow pages are good sources for a used one or you local auto parts store Autozone/Napa etc. if you needed a new one or rebuilt.
You can find ALOT of info on your vehicle in Haynes or Chilton manuals...Both available @ your local NAPA store or www.napaonline.com
go to a napa store they have that info
Contact LMC truck.com and order the catalog for your 89 suburban , they have detailed info on where and how to find info for your vehicle plus hard to find parts
Try an auto parts store web site. NAPA, AutoZone. etc. all have home pages that allow you to enter vehicle / engine info an gives you a list of parts / fluids availble for your particular car / truck. Free It will be posted in the owners manual or on a sticker under the hood close to the radiator. Thanks.
autozone.com has online manuals filled with info
Gun Parts Corporation in Hurley NY offers Schematics and some parts. I believe they are e-gunparts on the web.
How reliable and true the info they have is.
Try the web site of: http://www.wisnersinc.com You can get a schematic of the action and a parts list of the parts they sell.