OEM GM Workshop or service manual supplement for the 1990 Chevrolet Lumina APV. This book is in Average shop used condition with Light wear and creasing to the covers and a few loose pages. GMC # ST 378-90PSID This manual is the GM OEM Dealership manual. The same manual used by the dealership mechanics while working or your vehicle. These manuals are so much better than the off brand manuals out there. This manual has detailed service information, exploded drawings and specs all directly from GMC!This Manual Includes the Following Sections: General Information Heating and Air Conditioning Frame and Bumpers Steering, Suspension, tires and Wheels Drive Axle Brakes Engine Tranaxle Electrical Accessories Body Index ~250 pages per 1/2" thickness. This manual measures 8-1/2" x 11" x 2" thick. So, this manual has about 1200 pages.Thanks for your interest, and please ask any questions you may have!