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SERVICE and TRUCK I

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SERVICE and TRUCK I 1975 CHEVROLET LIGHT DUTY SERVICE and TRUCK I IMPORTANT SAFETY NOTICE Proper service and repair is important to the safe, reliable operation of all motor vehicles. The service procedures recommended by Chevrolet and described in this service manual are effective methods for performing service operations. Some of these service operations require the use of tools specially designed for the purpose. The special tools should be used when and as recommended. It is important to note that some warnings against the use of specific service methods that can damage the vehicle or render it unsafe are stated in this service manual. It is also important to understand these warnings are not exhaustive. Chevrolet could not possibly know, evaluate and advise the service trade of all conceivable ways in which service might be done or of the possible hazardous consequences of each way. Consequently, Chevrolet has not undertaken any such broad evaluation. Accordingly, anyone who uses a service procedure or tool which is not recommended by Chevrolet must first satisfy himself thoroughly that neither his safety nor vehicle safety will be jeopardized by the service method he selects. SECTION INDEX SECTION NAME GENERAL INFORMATION 1 9 7 5 0 AND LUBRICATION HEATER AND 10-30 SERIES TRUCK 1A AIR CONDITIONING CHASSIS SERVICE 1B BODY and 2 FRAME OVERHAUL MANUAL 4 REAR SUSPENSION SUPPLEMENT AND DRIVELINE 5 BRAKES ENGINE FOREWORD 6 FUEL SYSTEM This manual has been prepared as a supplement to the 1974 Light 6M Duty Truck Service and Overhaul Manuals. It covers, in sepa­ rate sections, diagnosis, maintenance adjustments, service oper­ EMISSION CONTROL ations, and overhaul procedures for the 1975 10-30 Series truck 6T SYSTEMS models. Any reference to brand names in this manual is intended ENGINE ELECTRICAL merely as an example of the types of lubricants, tools, materials, 6Y etc., recommended for use. In all cases, an equivalent may be used. AUTOMATIC All information, illustrations and specifications contained in 7A TRANSMISSION this literature are based on the latest product information availa­ ble at the time of publication approval. The right is reserved to CLUTCH AND make changes at any time without notice. 7M MANUAL TRANSMISSION FUEL TANK AND SERVICE SECTION 8 EXHAUST SYSTEM The Service Section of this manual includes new or revised procedures for maintenance and adjustments, minor service op­ 9 STEERING erations and replacement of components. 10 WHEELS AND TIRES 11 CHASSIS SHEET METAL ELECTRICAL—BODY CHEVROLET MOTOR DIVISION 12 AND CHASSIS General Motors Corporation 13 RADIATOR AND GRILLE DETROIT, MICHIGAN 15 ACCESSORIES SPECIFICATIONS — AT REAR OF MANUAL ®1974 General M otors Corporation Printed in U.S.A. SECTION 0 GENERAL INFORMATION AND LUBRICATION CONTENTS OF THIS SECTION General Information........................................................................ 0-1 I Lubrication........................................................................................... 0-5 GENERAL INFORMATION INDEX Model Line U p................................................................... 0-1 Unit and Serial Number Locations.............................. 0-1 Service Parts Identification Plate................................... 0-3 Truck Model Identification............................................... 0-1 Keys and Locks.................................................................... 0-3 Vehicle Identification Number and Rating Plate.... 0-1 Emergency Starting............................................................ 0-3 Engine Number.................................................................... 0-1 Towing.................................................................................... 0-5 MODEL LINE UP 10 - Day of Manufacture (tenth) The 10 through 30 Series truck model line-up for 1975 T - Truck consists of the models shown in the Charts in this section. FA - Transmission and engine type Truck Model Identification UNIT AND SERIAL NUMBER LOCATIONS All 10-30 series models are identified by this model system. Basically the designation consists of 7 characters, For the convenience of service technicians and engineers 2 letters followed by five numbers. The first letter when writing up certain business papers such as indicates a Chevrolet model and the second identifies the Warranty Reports, Product Information Reports, or chassis type. The first number designates the GVW reporting product failures in any way, the location of the range, the second and third identify the cab-to-axle dimension or model type and the last two identify the various unit numbers have been indicated. These unit cab or body style. numbers and their prefix or suffix are necessary on these papers for various reasons - such as accounting, follow- VEHICLE IDENTIFICATION NUMBER up on production, etc. AND RATING PLATE The prefixes on certain units identify the plant in which A combination vehicle identification number and rating the unit was manufactured and thereby permits proper plate used on all models (fig. 1) is located on the left follow-up of the plant involved to get corrections made door pillar of CK models. On Forward Control models when necessary. (except P30 Motor Home Chassis) it is attached to the dash and toe panel. Always include the prefix in the number. The vehicle identification number stamped on the plate decodes into the information shown in Figure 2. Axles • Series 10, 20 and P30 Code is stamped on Front of ENGINE NUMBER Right Rear Axle Tube Inboard of Upper Control The engine number indicates manufacturing plant, Arm Bracket. month and day of manufacture, and transmission type. A typical engine number would be F1210TFA, which • Series CG30 (except dual wheel) code is stamped at would breakdown thus: the Forward Upper Surface of Carrier. F - Manufacturing Plant (F-Flint, T-Tonawanda) • Dual Wheel Part Number and Production Code is 12 - Month of Manufacture (December) stamped on Front of Right Axle Tube. TRUCK SUPP - SERVICE 0-2 GENERAL INFORMATION AND LUBRICATION TRUCK MODEL IDENTIFICATION 1. CHEVROLET C C 10703 2. CHASSIS TYPE 3. GVW RANGE - 4. CA DIMENSION/MODEL TYPE 5. CAB OR BODY S T Y LE ------------ © © CHASSIS TYPE CA DIMENSION/MODEL TYPE C— Conventional 4 x 2 05-B LA Z E R G— Forward Control 4 x 2 07— 42” (Body-Frame Integral) 08— FC or Motor Home Chassis K—Conventional 4 x 4 09— 56" (Four Wheel Drive) 10— 60"/FC Chassis, Chevy P— Forward Control 4 x 2 Van, Sportvan (Conventional) 11— Motor Home Chassis 13— Chevy Van, Sportvan, (D Cutaway Van GVW RANGE 14— 84"/FC or Motor Home Chassis 1-4500 to 7150 2 -5 5 0 0 to 8200 3 -6 2 0 0 to 14,000 © CAB OR BODY STYLE 03— Conventional Cab (C-K models) 04— Cutaway Van (G models) 05— Chevy Van 06— Suburban/Sportvan with Panel Rear Doors 14— Blazer 32— M otor Horne Chassis 42— Forward Control Chassis 63— Crew Cab TRUCK SUPP • SERVICE GENERAL INFORMATION AND LUBRICATION 0-3 Engines • 6-Cylinder Engine Unit Number Located on Pad at GENERAL MOTORS CORPORATION Right Hand Side of Cylinder Block at Rear of im unty u r if m m v k k n i actus m y o r unncs shown cioss Distributor. nm cu vcuit iuudu kjsii o r u s nmciE. m ascio eduvm ui. wm iunuutti^ucAuwm inLtAflum Ts u o n t o nmcu. • 8-Cylinder Engine Unit Number Located on Pad at Front, Right Hand Side of Cylinder Block. RATINGS IN POUWPS—AS MANIffjCTHED tttSS K K U VDQn m TK VQKU Delcotrons 4UDM VM FMMT EHO VDOTF AT Delcotron Unit Serial Number Located at Top of Rear HAliWM tU I UN VDOn tT Housing. WKummncjimiiM. f Batteries Battery Code Number Located on Cell Cover Top of □ Battery. Starters Fig. 1— Vehicle Identification Number and Rating Starter Serial Number and Production Date Stamped on Plate Information Outer Case, Toward Rear. SERVICE PARTS IDENTIFICATION PLATE ENGINE The Service Parts Identification Plate (fig. 3) is provided DESIGNATION on all Truck models. On most series it will be located on Q = L6-250-1 T= L6-292-1 the inside of the glove box door, or, on Forward Control V = V 8-350-2 series, it will be located on an inner body panel. The Y = V8-350-4 SERIES plate lists the vehicle serial number, wheelbase, and all M= V8-400-4 1 ' 2 TON Production options or Special Equipment on the vehicle DIVISION Z = V 8-454-4 2 -% L = V8-454-4 when it was shipped from the factory including paint C = CHEVROLET 31 —MODEL YEAR T = GMT 5 = 1975 for al information. ALWAYS REFER TO THIS INFORMATION Series. C C Q 1 WHEN ORDERING PARTS. CHASSIS TYPE SEQUENTIAL NUMBER KEYS AND LOCKS C - 2 WHEEL DRIVE G=LIG HT DUTY Two keys are provided with each vehicle. Different lock FORWARD CONTROL cylinders operated by a separate key are available as an K 4 WHEEL DRIVE option for the sliding side load door and rear load doors. L = LIGHT UTILITY P FORWARD CONTROL ASSEMBLY PLANT Z =MOTOR HOME EMERGENCY STARTING A-Lakewood V-GM Truck-Pontiac BODY STYLE B-Baltimore S-St. Louis • Engines in vehicles with automatic transmissions 2-Forward Control F-Flint U-Lordstown J- Janesville cannot be started by pushing or towing the vehicle. chassis only Z-Frem ont K- Leeds 3-Cab-chassis (Cutaway) 1-O shawa • Never tow or push trucks equipped with light duty 4-Cab and pickup box 3-GMAD Detroit emission control systems to start engine. 5-Van and Panel 6-Suburban body 7-Motor Home 8-Utility (Blazer) Fig. 2— Vehicle Identification Number Transmissions • 3-Speed Transmission Unit Number Located on Lower Left Side of Case Adjacent to Rear of Cover. • 4-Speed Transmission Unit Number Stamped on Rear of Case, Above Output. • Turbo Hydra-Matic 350 Transmission Unit Number Located on Right Rear Vertical Surface of Oil Pan. •The Turbo Hydra-Matic Transmission 400 Serial Number is Located on the Light Blue Plate on the Right IMPORTANT: RETAIN THIS PLATE AS A PERMANENT RECORD Side of the Transmission. Fig. 3— Service Parts Identification Plate TRUCK SUPP • SERVICE 0-4 GENERAL INFORMATION AND LUBRICATION • A vehicle with a discharged battery may be started would cause personal injury. Batteries and by transferring electrical power from a battery in battery acid should always be kept out of reach another car - called "jump starting".
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