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operating conditions require lubrication on a regular basis every 3,000 miles (5 000 km). (a) A fluid loss in any vehicle system could indicate a problem. Have the system inspected and repaired and the fluid level checked. Add fluid if needed. (b) If you drive regularly under dusty conditions, inspect the filter or change indicator, if equipped, at each engine oil change.
(c) Visually inspect brake lines and hoses for proper hook-up, binding, leaks, cracks, chafing, etc. Inspect disc brake pads for wear and rotors for surface condition. Inspect drum brake linings/shoes for wear or cracks. Inspect other brake parts, including drums, wheel cylinders, calipers, parking brake, etc. (d) Visually inspect front and rear suspension and steering system for damaged, loose, or missing parts, signs of wear or lack of lubrication. Inspect power steering lines and hoses for proper hook-up, binding, leaks, cracks, chafing, etc. Pickup models: Visually check constant velocity joints, rubber boots, and axle seals for leaks. (e) Visually inspect hoses and have them replaced if they are cracked, swollen, or deteriorated. Inspect all pipes, fittings, and clamps; replace with genuine GM parts as needed. To help ensure proper operation, a pressure test of the cooling system and pressure cap and cleaning the outside of the radiator and air conditioning condenser is recommended at least once a year. (f) Visually inspect wiper blades for wear or cracking. Replace wiper blades that appear worn or damaged or that streak or miss areas of the windshield.
6-9
(g) Make sure the safety belt reminder light and all your belts, buckles, latch plates, retractors, and anchorages are working properly. Look for any other loose or damaged safety belt system parts. If you see anything that might keep a safety belt system from doing its job, have it repaired. Have any torn or frayed safety belts replaced. Also look for any opened or broken airbag coverings, and have them repaired or replaced. The airbag system does not need regular maintenance. (h) Lubricate all key lock cylinders, body door hinges, hood latch assembly, secondary latch, pivots, spring anchor, release pawl, fuel door hinge, locks, latches, and any folding or moving seat hardware. Pickup models: Lubricate tailgate hinges, tailgate linkage, tailgate handle pivot points, and latch bolt. Van models: Lubricate hood hinges and rear compartment hinges. More frequent lubrication may be required when exposed to a corrosive environment. Applying silicone grease on weatherstrips with a clean cloth will make them last longer, seal better, and not stick or squeak. (i) Van Models: If the two chassis mounted fuel filters have not been replaced, or if the vehicle has been driven 20,000 miles (32 000 km) or more since the fuel filters were last replaced, replace both fuel filters.
(j) Pickup Models: This vehicle has a CHANGE FUEL FILTER message in the Driver Information Center (DIC) to tell you when to replace the fuel filter. See Driver Information Center (DIC) (Pickup Models Only) on page 3-9 for more information and how to reset the message after the fuel filter is replaced. If the fuel filter has not been replaced, or if the vehicle has been driven 15,000 miles (25 000 km) or more since the fuel filter was last replaced, replace the filter and reset the message. (k) Inspect shields and underhood insulation for damage or looseness. Adjust or replace as required. This is a Noise Emission Control Service. Applicable to vehicles sold in the United States and recommended for vehicles sold in Canada. (l) Check the air intake system installation to assure that gaskets are properly sealed and that all hose connections, fasteners, and other components are tight. Also check to be sure that the air cleaner housing is properly seated and the cover fits tightly. Tighten connections and fasteners or replace damaged parts as necessary. This is a Noise Emission Control Service. Applicable to vehicles sold in the United States and recommended for vehicles sold in Canada. (m) Check system for interference or binding and for damaged or missing parts. Replace parts as needed. Replace any components that have high effort or excessive wear. Do not lubricate accelerator or cruise control cables.
6-10
(n) Change clutch fluid (or every 24 months, whichever occurs first). (p) Change automatic transmission fluid and external transmission filter if the vehicle is mainly driven under one or more of these conditions:
− In heavy city traffic where the outside temperature
regularly reaches 90°F (32°C) or higher.
− In hilly or mountainous terrain. − When doing frequent trailer towing. − Uses such as found in taxi, police, or delivery
service.
(q) Check vent hose at transfer case for kinks and proper installation. (r) Drain, flush, and refill cooling system. This service can be complex; you should have your dealer perform this service. See Engine Coolant on page 5-34 for what to use. Inspect hoses. Clean radiator, condenser, van model fuel operated heater (if equipped), pressure cap, and filler neck. Pressure test the cooling system and pressure cap. For van models, see Fuel Operated Heater (FOH) (Van Models Only) on page 2-8. (s) Visually inspect belt for fraying, excessive cracks, or obvious damage. Replace belt if necessary.
Owner Checks and Services These owner checks and services should be performed at the intervals specified to help ensure the safety, dependability, and emission control performance of your vehicle. Your GM Goodwrench® dealer can assist you with these checks and services. Be sure any necessary repairs are completed at once. Whenever any fluids or lubricants are added to your vehicle, make sure they are the proper ones, as shown in Recommended Fluids and Lubricants on page 6-15.
At Each Fuel Fill It is important to perform these underhood checks at each fuel fill. Engine Oil Level Check Check the engine oil level and add the proper oil if necessary. See Engine Oil on page 5-21 for further details. Notice: and keep it at the proper level. Failure to keep your engine oil at the proper level can cause damage to your engine not covered by your warranty.
It is important to check your oil regularly
6-11
Engine Coolant Level Check Check the engine coolant level and add DEX-COOL® coolant mixture if necessary. See Engine Coolant on page 5-34 for further details. Windshield Washer Fluid Level Check Check the windshield washer fluid level in the windshield washer fluid reservoir and add the proper fluid if necessary.
At Least Once a Month Tire Inflation Check Visually inspect your vehicle’s tires and make sure they are inflated to the correct pressures. Do not forget to check the spare tire. See “Tires” in your owner manual for further details. Check to make sure the spare tire is stored securely. See “Changing a Flat Tire” in your owner manual. Tire Wear Inspection Tire rotation may be required for high mileage highway drivers prior to the Engine Oil Life System service notification. Check the tires for wear and, if necessary, rotate the tires. See “Tire Inspection and Rotation” in your owner manual.
6-12
At Least Once a Year Starter Switch Check
{CAUTION:
When you are doing this inspection, the vehicle could move suddenly. If the vehicle moves, you or others could be injured.
1. Before you start, be sure you have enough room
around the vehicle.
2. Firmly apply both the parking brake and the regular brake. See “Parking Brake” in your owner manual. Do not use the accelerator pedal, and be ready to turn off the engine immediately if it starts.
3. Try to start the engine in each gear. The vehicle should start only in PARK (P) or NEUTRAL (N). If the vehicle starts in any other position, contact your GM Goodwrench® dealer for service.
Automatic Transmission Shift Lock Control System Check
{CAUTION:
When you are doing this inspection, the vehicle could move suddenly. If the vehicle moves, you or others could be injured.
1. Before you start, be sure you have enough room around the vehicle. It should be parked on a level surface.
2. Firmly apply the parking brake. See “Parking Brake”
in your owner manual. Be ready to apply the regular brake immediately if the vehicle begins to move.
3. With the engine off, turn the ignition to RUN, but do
not start the engine. Without applying the regular brake, try to move the shift lever out of PARK (P) with normal effort. If the shift lever moves out of PARK (P), contact your GM Goodwrench® dealer for service.
Ignition Transmission Lock Check While parked, and with the parking brake set, try to turn the ignition to LOCK in each shift lever position. • The ignition should turn to LOCK only when the
shift lever is in PARK (P).
• The key should come out only in LOCK. Contact your GM Goodwrench® dealer if service is required.
6-13
Parking Brake and Automatic Transmission Park (P) Mechanism Check
{CAUTION:
When you are doing this check, your vehicle could begin to move. You or others could be injured and property could be damaged. Make sure there is room in front of your vehicle in case it begins to roll. Be ready to apply the regular brake at once should the vehicle begin to move.
Park on a fairly steep hill, with the vehicle facing downhill. Keeping your foot on the regular brake, set the parking brake. • To check the parking brake’s holding ability: With the
engine running and transmission in NEUTRAL (N), slowly remove foot pressure from the regular brake pedal. Do this until the vehicle is held by the parking brake only.
• To check the PARK (P) mechanism’s holding
ability: With the engine running, shift to PARK (P). Then release the parking brake followed by the regular brake.
Contact your GM Goodwrench® dealer if service is required. Underbody Flushing Service At least every spring, use plain water to flush any corrosive materials from the underbody. Take care to clean thoroughly any areas where mud and other debris can collect.
6-14
Recommended Fluids and Lubricants Fluids and lubricants identified below by name, part number, or specification may be obtained from your dealer.
Usage
Fluid/Lubricant
Engine oils with the letters CI-4 or CH-4 are best for your vehicle. The CI-4 or CH-4 designation may appear either alone, or in combination with other API designations, such as API CI-4/SL. These letters show American Petroleum Institute (API) levels of quality. GM Goodwrench® oil meets all the requirements for your vehicle. To determine the preferred viscosity for your vehicle’s diesel engine, see Engine Oil on page 5-21. 50/50 mixture of clean, drinkable water and use only DEX-COOL® Coolant. See Engine Coolant on page 5-34. Delco® Supreme 11 Brake Fluid or equivalent DOT-3 brake fluid.
Engine Oil
Engine Coolant
Hydraulic Brake
System
Usage
Windshield
Washer
Van Models: Parking Brake Cable Guides
Pickup Models:
Hydraulic
Clutch System
(5-Speed Trans.)
Pickup Models:
Hydraulic
Clutch System
(6-Speed Trans.)
Fluid/Lubricant
GM Optikleen® Washer Solvent.
Chassis Lubricant (GM Part No. U.S. 12377985, in Canada 88901242) or lubricant meeting requirements of NLGI #2, Category LB or GC-LB.
Hydraulic Clutch Fluid (GM Part No. U.S. 12345347, in Canada 10953517) or equivalent DOT-3 brake fluid.
Hydraulic Clutch Fluid. Use only GM Part No. U.S. 88958860, in Canada 88901244, Super DOT-4
brake fluid.Power Steering
System
GM Power Steering Fluid (GM Part No. U.S. 89021184, in Canada 89021186).
Pickup Models:
Manual
Transmission
(5-Speed
with Low Gear,
RPO MW3)
GM Goodwrench® Synthetic Manual Transmission Fluid (GM Part No. U.S. 12346190, in Canada 10953477) or equivalent SAE 75W-85 GL-4 gear oil.
6-15
Usage
Fluid/Lubricant
Usage
Fluid/Lubricant
Synchromesh Transmission Fluid (GM Part No. U.S. 12345349, in Canada 10953465).
Synthetic Transmission Fluid approved to Allison Transmission® specification TES-295
(GM Part No. U.S. 12378515, in Canada 88900701). DEXRON®-VI Automatic Transmission Fluid. Multi-Purpose Lubricant, Superlube (GM Part No. U.S. 12346241, in Canada 10953474). Lubriplate Lubricant Aerosol (GM Part No. U.S. 12346293, in Canada 992723) or lubricant meeting requirements of NLGI #2
Category LB or GC-LB. Chassis Lubricant (GM Part No. U.S. 12377985, in Canada 88901242) or lubricant meeting requirements of NLGI #2, Category LB or GC-LB.Pickup Models:
Manual
Transmission
(5-Speed without
Low Gear, RPO MG5)
Pickup Models:
Manual
Transmission
(6-Speed)
Automatic
Transmission
Key Lock Cylinders
Pickup Models:
Floor Shift Linkage
Chassis
Lubrication
6-16
Van Models: Front Wheel
Bearings
Van Models:
Front and Rear Axle
Pickup Models:
Front Axle
Pickup Models:
Rear Axle
Pickup Models:
Manual
Transfer Case
Pickup Models:
Automatic
Transfer Case
Van Models: Transfer Case
Wheel bearing lubricant meeting requirements of NLGI #2, Category GC or GC-LB (GM Part No. U.S. 1051344, in Canada 993037). SAE 75W-90 Synthetic Axle Lubricant (GM Part No. U.S. 12378261, in Canada 10953455) or equivalent meeting GM Specification 9986115. SAE 80W-90 Axle Lubricant (GM Part No. U.S. 1052271, in Canada 10950849). SAE 75W-90 Synthetic Axle Lubricant (GM Part No. U.S. 12378261, in Canada 10953455) meeting GM Specification 9986115. DEXRON®-III Automatic Transmission Fluid. Look for “Approved for the H-Specification” on the label. AUTO-TRAK II Fluid (GM Part No. U.S. 12378508, in Canada 10953626). DEXRON®-III Automatic Transmission Fluid. Look for “Approved for the H-Specification” on the label.
Usage
Fluid/Lubricant
Usage
Fluid/Lubricant
Van Models: One-Piece
Propshaft Slip Yoke Spline, Two-Piece Propshaft Slip-in-Tube
Spline
Pickup Models:
Front Axle Propshaft Spline or One-Piece Propshaft
Spline
(Two-Wheel Drive with
Auto. Trans.)
Spline Lubricant, Special Lubricant (GM Part No. U.S. 12345879, in Canada 10953511) or lubricant meeting requirements of GM 9985830.
Spline Lubricant, Special Lubricant (GM Part No. U.S. 12345879, in Canada 10953511) or lubricant meeting requirements of GM 9985830.
Pickup Models: Rear Driveline Center Spline
Chassis Lubricant (GM Part No. U.S. 12377985, in Canada 88901242) or lubricant meeting requirements of NLGI #2, Category LB or GC-LB.
Hood Hinges
Multi-Purpose Lubricant, Superlube (GM Part No. U.S. 12346241, in Canada 10953474).
Pickup Models:
Body Door Hinge Pins,
Tailgate Hinge and Linkage, Folding Seats, and Fuel Door
Hinge
Pickup Models: Tailgate Handle
Pivot Points, Hinges, Latch
Bolt, and Linkage
Multi-Purpose Lubricant, Superlube (GM Part No. U.S. 12346241, in Canada 10953474).
Multi-Purpose Lubricant, Superlube (GM Part No. U.S. 12346241, in Canada 10953474).
Weatherstrip Conditioning
Weatherstrip
Squeaks
Dielectric Silicone Grease (GM Part No. U.S. 12345579, in Canada 992887). Synthetic Grease with Teflon, Superlube (GM Part No. U.S. 12371287, in Canada 10953437).
6-17
Normal Maintenance Replacement Parts Replacement parts identified below by name, part number, or specification can be obtained from your dealer.
Part
GM Part Number
ACDelco® Part Number
Oil Filter
Engine Air Cleaner/Filter
Pickups Models Van Models
Fuel Filter(s)
Pickup Models Van Models (Primary and Secondary Filter Kit)
Use only the specified filters. *Racor service kit includes primary filter, secondary filter and o-rings.
88917036
25332443
1510254697385488
19121764PF2232
A1618C A2959C
TP1298A RK58095*
6-18
Engine Drive Belt Routing
6-19
Maintenance Record After the scheduled services are performed, record the date, odometer reading, who performed the service, and the type of services performed in the boxes provided. See Maintenance Requirements on page 6-2. Any additional information from Owner Checks and Services on page 6-11 can be added on the following record pages. You should retain all maintenance receipts.
Date
Odometer Reading
Serviced By
Maintenance I or Maintenance II
Services Performed
Maintenance Record
6-20
Date
Odometer Reading
Serviced By
Maintenance I or Maintenance II
Services Performed
Maintenance Record (cont’d)
6-21
Date
Odometer Reading
Serviced By
Maintenance I or Maintenance II
Services Performed
Maintenance Record (cont’d)
6-22
Automatic Transmission, Fluid ........................... 5-29
Canadian Owners ................................................ ii Capacities and Specifications
Specification Charts ..................................... 5-50
Coolant
Engine ....................................................... 5-34
Surge Tank Pressure Cap ............................. 5-39
Cooling System .............................................. 5-41Diesel
Engine Fuel .................................................. 5-2
Filling a Portable Fuel Container .................... 5-17
Filling Your Tank .......................................... 5-15Diesel (cont.)
Fuel Requirements and Fuel System ................ 5-2
Running Out of Fuel .................................... 5-11
Very Cold Weather Operation .......................... 5-5
Water in Fuel ............................................... 5-5
Water in Fuel Light Chart ............................... 5-6
What Fuel to Use .......................................... 5-3
Driver Information Center (DIC) .......................... 3-9Engine
Air Cleaner/Filter ......................................... 5-25
Compartment Overview ................................ 5-18
Coolant ...................................................... 5-34
Oil ............................................................. 5-21
Overheating ................................................ 5-39
.................................... 3-7
Reduced Power Light Engine Coolant Heater ...................................... 2-8Instrument Panel Cluster ................................... 3-2
Light
Lights
Reduced Engine Power .................................. 3-7
Water in Fuel Warning ................................... 3-9Malfunction Indicator Lamp ............................. 3-4
Wait to Start ................................................. 3-7
Water in Fuel Light Chart ............................... 5-6Fuel
At Each Fuel Fill ......................................... 6-11
Diesel Engine ............................................... 5-2
Diesel Requirements and Fuel System ............. 5-2
Filling a Portable Fuel Container .................... 5-17
Filling Your Tank .......................................... 5-15
Filter Replacement ....................................... 5-12
Gage ........................................................... 3-8
Running Out of ........................................... 5-11
Water in Warning Light .................................. 3-9
What to Use ................................................. 5-3
Fuel Operated Heater (FOH) .............................. 2-8Gage
Fuel ............................................................ 3-8
Oil Pressure ................................................. 3-6M
Maintenance Schedule
At Each Fuel Fill ......................................... 6-11
At Least Once a Month ................................ 6-12
At Least Once a Year .................................. 6-12
Introduction .................................................. 6-2
Maintenance Requirements ............................. 6-2
Scheduled Maintenance ................................. 6-4
Using .......................................................... 6-2
Your Vehicle and the Environment ................... 6-2
Malfunction Indicator Lamp ................................ 3-4Oil, Engine ..................................................... 5-21
Oil Pressure Gage ............................................ 3-6
Overheating, Engine ........................................ 5-39
Owners, Canadian ............................................... iiPower
Reduced Engine Light .................................... 3-7
Radiator Pressure Cap .................................... 5-39
Reduced Engine Power Light ............................. 3-7
Running Out of Fuel ........................................ 5-11Scheduled Maintenance ..................................... 6-4
Specification Charts ......................................... 5-50
Starting the Diesel Engine ................................. 2-2
Surge Tank Pressure Cap, Coolant .................... 5-39T
Towing
Trailer .......................................................... 4-2
Transmission, Automatic Fluid ........................... 5-29Wait to Start Light ............................................ 3-7
Water in Fuel ................................................... 5-5
Water in Fuel Light Chart .................................. 5-6
Water in Fuel Warning Light ............................... 3-9
Winter Cover ................................................... 2-6
