This is a new and still sealed 1987 / 1988 GMC truck and Chevrolet truck Fuel Drivability and Emissions service manual. This is a dealership book X-8736 with supplement X-8860. Supplemental data is dated April 1987. Some of this data probably applies to 1986 trucks and 1989 and later trucks as well. 

Please note that I have a full time job monday through friday 8-6, that does not involve selling parts on ebay. I try to reserve all of my packing and shipping for the weekends. So if you purchase something from me from Sunday to Friday, I will not ship it until the following weekend. My storage is a 50 mile round trip from my house so I only try to go there once a week. If you are in an obnoxious hurry for something please do us both a favor and keep shopping. If you can patiently wait for good quality parts I will welcome your business.