ord To The G MC Motor Home Owne Congratulations on vour purchase of a GM f ' Motor Home )'()it have opened the way to an endless variety of happy We have prepared this manual to assist you in properly operating and maintaining your Motor Home, and to provide important safety i n formation . We urge you to read this manual carefully andfollow the recommendations contained to help assure the most enjoyable and trouble-free operation o f your vehicle . In the" Warranties" section of this manual you will find the New Vehicle Warranty and the Emission Control . ystems War-rants. When it comes to service, remember that your GM C Motor Ilome Service Outlet knows your vehicle best and is interested in your complete satisfaction. Return to him for service road any other assistance you may require . GM C Truck and Coach maintains a number of "bone Offices throughout the country . Should you have a problem that cannot be handled through normal channels, please fol low the procedure described under the "Owner Assistance" section . Thank you for choosing a GMC Motor Home. We extend our best wishes for many years ofplea ant traveling. Cordially, R . C. Stelter General Sales Manager GMC MOTOR HOME OPERATING MANUAL IMPORTANT This manual should be considered a permanent part of the vehicle and must remain with the vehicle at time of re-sale. All information, illustrations and specifications contained in this manual are based on the latest product information available at the time of pub- lication. The right is reserved to make changes at any time without notice . For vehicles sold in Canada, substitute the name General Motors of Canada whenever the name GMC Truck & Coach Division appears in this manual . Service Publications GMC TRUCK & COACH DIVISION GENERAL MOTORS CORPORATION Pontiac, Michigan 48053 General Motors Corporation 1973 TABLE OF CONTENTS SUBJECT PAGE NO . SUBJECT PAGE NO. Important Information on Fuel Gauge . 20 Vehicle Loading . 1 Temperature Gauge . 21 Before Driving Your __Motor Home . 5 Oil Pressure Gauge . 21 Driv er (" hecklist st 5 Charging System Warning Light . 21 .,. 5 Inside: iew Mirror . Brake System Warning Light . 21 Seats 6 Tell-Tale Warning Light Cluster . 22 Keys . 7 Headlight Switch . 22 Entrance Door . 7 Windshield Wiper Lever . 22 Lap Belts . 8 Windshield Washers . 23 Child Restraint . 9 Fuel Selector Switch . 23 Vehicles Not Equipped With Battery Boost Switch . Special Child Restraints . 9 . 23 Operation In Foreign Countries . 9 Cigar-Cigarette Lighter . 23 Trailer Hauling . 10 Heating System (Without Trip Tips . 10 Automotive Air Conditioner) . 23 Driving Tips . 11 Automotive Air Conditioner . 24 New Vehicle Operating Speeds . 11 Rados and Tape Deck . 25 Starting and Operating Vehicle . 13 Mobile Radio Transmitters . 27 Engine Exhaust Gas Caution . 13 Power Level System . 27 Steering Column Controls . 14 Operation of Living Area Facilities . 29 Anti-Theft Steering Column Lock . 14 Living Area Facilities Caution . 29 Parking . 14 Living Area Electrical System . 29 Starting Engine . 14 General Information . 29 Automatic Transmission . 15 120-Volt & 12-Volt Turn Signals and Lane Change Feature . 16 Converter and Battery Charger . 29 Hazard Warning Flasher . 16 External Power . 30 Horn Control . 16 Lighting System . 31 Power Steering . 16 Monitor Panel . 31 Tilt Steering Wheel . 16 Onan Motor Generator . 31 Cruise Control . 17 Kohler Motor Generator . 32 Floor Controls . 17 Living Area Water System . 33 Brake System . 17 Filling Water Tank . 35 Headlight Dimmer Switch . 19 Headlight "Flicker.. 19 External Water Connection . 35 Instrument Panel and Controls . 20 Water Pump . 35 Speedometer and Odometer . 20 Water Heater . 36 TABLE OF CONTENTS SUBJECT PAGE NO. SUBJECT PAGE NO . Kitchen Facilities . 37 Kitchen Sink . 60 All Electric Refrigerator . 37 Cleaning Fabrics . 60 Gas/Electric Refrigerator . 38 Removal of Specific Stains . 60 Kitchen Range/Oven . 40 Exterior Appearance Care . 61 Kitchen Sink and Bright Metal Parts . 61 Auxiliary Water Purifier . 43 Exterior Glass . 61 Bathroom Facilities . 43 Polishing and Waxing . 62 Standard Toilet . 43 Touch-up Paint . 62 Recirculating Toilet . 43 Undercoating . 62 Bathroom Sink and Service and Maintenance . 63 Shower Control Valve . 45 Accessibility . 63 Shower Head . 45 Exterior Compartments . 63 Thermasan System . 46 Engine Accessibility . 65 Ventilation . 47 Roof Carrier . 66 Windows . 47 Hoisting Instructions . 66 Ceiling Vent . 47 Complete Vehicle Maintenance Roof-Mounted Air Conditioner . 47 Schedule . 67 Furnace . 48 GMC Motor Home Maintenance Furniture . 50 Information . 68 In case of emergency . 53 Explanation of Complete Vehicle Four-Way Hazard Warning Flasher . 53 Maintenance Schedule . 68 Emergency Starting . 53 Lube & General Information . 68 Engine Coolant Caution . 55 Safety Maintenance . 69 Jack Usage Instructions . 55 Emission Control Maintenance . 71 Towing Motor Home . 56 Motor Generator Maintenance Freeing Vehicle From Sand, Etc . 57 Details . 72 Emergency Exit . 57 Onan 4000/6000 Watt Motor Fire Extinguisher . 57 Generator Maintenance Schedule . 73 Appearance Care . 59 Kohler 4000 Watt Motor Generator Care and Cleaning of Interior Maintenance Schedule . 73 General Information . 59 Recommended Fluids & Lubricants . 74 Vacuum Cleaner . 59 Lubrication Details . 75 Lap Belt Care . 60 Engine . 75 Interior Glass . 60 Transmission . 77 TENTS SUBJECT PAGE NO . SUBJECT PAGE NO . Final Drive.. 78Sanitizing Living Area Water Steering Sy stem . 78 System . 105 Brake System . 79 Winterization . --106 Servicing Details . 79 Vehicle Storage . 106 Engine Cooli ng S ystem m9 New Vehicle Warranty 111 Enginc FuelEmission Co trol Systems Information LP Gas System 115 .. h lec .- C ., . General Data and Specifications 119 127 Assista nce at U . S, Motor Home Service Outlet Locations . Zone Territories l31 U .S . Zone Offices . .13 2 Mexico Zone Office1 3 2 011 ension 99 GM of Canada Limited-Zone Offices . 133 Rear .100 Sudden Service System . .134 Tlerma; a<1 System. .101 After-Hour Service Assistance . 134 Standard Toilet . 101 Maintenance Manual . Recirculating Toilet . .102 Index . Draining Holding Tank . 103 Gas Station Information . .141 Draining Living Area Water System, 104 IMPORTANT INFORMATION ON VEHICLE LOADING CAUTION MAXIMUM FRONT AND The components of your Motor Home REAR AXLE WEIGHTS are designed to provide satisfactory The weight of the load must be properly dis- service if the vehicle is not loaded in tributed over both the front and the rear axles, excess of either the gross vehicle weight, necessarily evenly . The plate shows or the maximum front and rear end although not weights, specified on a permanent place the maximum weight that the front axle can which is located behind the right engine carry and the maximum weight that the rear access door . Overloading can create seri- axles can carry. Note that the sum of these is ous potential safety hazards and can greater than the GVW, so that it is not neces- also shorten the service life of your ve- sarily proper to load both axles, at the same hicle. Your local dealer can advise you time, to the maximum capacity shown for each. concerning proper loading conditions of The GVW rating represents the weight that the your vehicle. complete vehicle is designed to carry, taking into consideration the engine, transmission, frame, When loading the Motor Home, it is impor- tant that it is properly loaded . All items should spring, and tire capabilities. Actual front and be loaded as centrally and as low as possible . rear end weights at the ground can only be This is essential to maintain proper vehicle determined by weighing the vehicle. This can handling . Even though a single item may not be accomplished through highway weigh sta- weigh much alone, several of these items may tions or other such commercial facilities . For have considerable weight. Proper loading is assistance in this regard, consult your service essential. outlet. GVW RATING 10,500 LBS. FRONT AXLE CAPACITY REAR AXLE CAPACITY 4,200 LBS . 7,000 LBS. L O J FRONT CURB 3,800 LBS . REAR CURB 4,800 LBS. FRONT BODY REAR BODY AND LOAD 400 LBS . AND LOAD 2,200 LBS . TOTAL 4,200 LBS . TOTAL 7,000 LBS. TOTAL WEIGHT AT GROUND 10,500 LBS. Vehicle Loading (Model 230) 1 GVW RATING 10,500 LBS. FRONT AXLE CAPACITY REAR AXLE CAPACITY 4,200 LBS. 7,000 LBS. AN FRONT CURB 3,600 LBS. REAR CURB 6,000 LBS. FRONT BODY REAR BODY AND LOAD 600 LBS . AND LOAD 1,000 LBS. TOTAL 4,200 LBS. TOTAL 7,000 LBS. TOTAL WEIGHT AT GROUND 10,500 LBS . Vehicle Loading (Model 260) GVW (GROSS VEHICLE WEIGHT) The permanent plate located behind the right GENERAL MOTORS CORPORATION engine access door shows the "As Manufactured" WARRANTY MAY BE VOIDED IF WEIGHT Gross Vehicle Weight Rating (GVW) and the EXCEEDS ANY OF THE RATINGS SHOWN . "Maximum Capability" rating for the Motor Home to which it is attached. GROSS VEHICLE WEIGHT INCLUDES WEIGHT OF BASE VEHICLE, ALL ADDED EQUIPMENT, DRIVER The "As Manufactured" rating represents the AND PASSENGERS, ANDALL PROPERTY LOADED vehicle's load carrying capabilities as initially INTO VEHICLE . manufactured. *REFER TO OWNER'S MANUAL FOR EQUIP- The "Maximum Capability" rating shown on MENT REQUIRED FOR INTERMEDIATE OR the plate MAXIMUM GVW RATINGS, AND FOR OTHER is the manufacturer's gross weight rat- LOADING INFORMATION, INCLUDING TIRE ing which is attainable for that vehicle, provided INFLATION . the required optional equipment is installed . RATINGS IN POUNDS "Gross Vehicle Weight" means the maximum AS MANU- *MAXIMUM FACTURED CAPABILITY design weight of the Motor Home, including the GROSS VEHICLE WEIGHT Motor Home itself, all items added to the Motor FOR THIS VEHICLE Home after it has left the factory, and everything MAXIMUM FRONT END that is loaded into (or onto) the Motor Home. WEIGHT AT GROUND IMPORTANT : Under no conditions should racks, MAXIMUM REAR END carriers, luggage, tires, or any other items be WEIGHT AT GROUND loaded on the front of the Motor Home so as to VEHICLE IDENT. NO.