Note in the options that it lists 'Bonanza Package' with the 'Cheyenne Equipment'. Looking at the model number, was this considered a K10? When did they start calling this a K5? Model K10516 Blazer-Utility-With Hard Top No Extra Charge: -Metal Cab Roof with Full Doors (this begs the question) -Dual Exterior Mirrors -Courtesy/Map Light -Deluxe-Air Heater and Defogger -Power Flow through ventilation -Rear Back-up Lamps -Power Disc/Drum Brake System -High Energy Ignition System -Engine Coolant Recovery System -Freedom Battery -...And Many More (This is actually what the sticker says) OPTIONS: -Sliding Side Window Glass -Folding Rear Seat -Soft Ray Tinted Glass - All Wdws -Electric Tailgate Window -Auxiliary -All weather Air Cond. - Front -Ext. B/Eye Mir (7.5"x10.5") Stl. -Rear Axle - 3.73 Ratio -Locking Differential-Rear Axle -Speed and Cruise Control -V8 Engine - 400 CID 4 BBL. (6.6L) -Auto Trans -Std Emission Sys -31 Gallon Fuel Tank -Fuel Tank Shield Plate -ConforTilt Steering Wheel -Rally WHeels -Electric CLock -AM Pushbutton Radio -Chromed Grill -LR78-15C Hwy Steel BLTD Rad W/W -LR78-15/C Hwy Steel BLTD Rad W/W (this is here twice) -Bonanza Package "D" -LR78-15/C Hwy Steel BLTD Rad W/W (third) -Oper Conv Package -Exterior Decor Package -White Removable Hard Top -Cheyenne Equipment -KUU4 Buckskin Cus Clo Hi BK Buck -81 Cordova Brown 12 Frost White MSRP--------------6,413.40 Options ----------3,798.30 Dest Chg------------454.00 Total Amount ----10,665.70 Came from Albuquerque, NM It has the 'Cheyenne' metal emblem on the rear fenders and the metal 'Bonanza' emblem on the front fenders. Added from an earlier topic for completeness of info: Bonanzas were a limited edition done at the end of the model year. I once spoke to a Chevrolet regional sales manager about this and asked if he knew anything about them. He assured me he did, and in fact when Chevrolet was trying to come up with a new name for their trucks, which ended up being 'Silverado', he had pushed to bring back 'Bonanza'. I have seen only one other in 5 years, a pickup of the same vintage as Monster Truck (this is what Lane's wife calls it and it had nothing to do with tires...Doug) and in a whole lot worse shape. I suppose the name came from the popular western from the seventies. Lane"