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Part C: Recommended Fluids and
Lubricants
Fluids and lubricants identified below by name, part
number, or specification can be obtained from your
dealer/retailer.
Usage Fluid/Lubricant
Engine Oil
(Gasoline
Engine)Engine oil which meets GM Standard
GM6094M and displays the
American Petroleum Institute (API)
Certified for Gasoline Engines
starburst symbol. To determine the
proper viscosity for your vehicle’s
engine, see “Engine Oil” in the Index.
Engine Oil
(DURAMAX
®/
Isuzu Diesel
Engines)Engine oils with the letters CJ-4 are
required for your vehicle. The CJ-4
designation can appear either alone
or in combination with other
American Petroleum Institute (API)
designations, such as API CJ-4/SL.
These letters show API levels of
quality. To determine the preferred
viscosity for your vehicle’s diesel
engine, see “Engine Oil” in the Index.
Engine Oil
(Caterpillar
®
Diesel Engine)See the Caterpillar
®Operation &
Maintenance Manual for engine oil
recommendations.
Usage Fluid/Lubricant
Engine Coolant
(Caterpillar
®
Diesel Engine)See the Caterpillar
®Operation &
Maintenance Manual for engine
coolant recommendations.
Engine Coolant
(Gasoline
Engine &
DURAMAX
®/
Isuzu Diesel
Engines)50/50 mixture of clean, drinkable
water and use only DEX-COOL
®
Coolant. SeeEngine Coolant
(Caterpillar Diesel Engines) on
page 5-47.
Hydraulic Brake
SystemDelco
®Supreme 11 Brake Fluid or
equivalent DOT-3 brake fluid.
Windshield
Washer SolventOptikleen
®Washer Solvent.
Clutch Bearing
LubricantClutch Bearing Lubricant (GM Part
No. 12378484 or equivalent NLGI
#3 consistency).
Exhaust Brake
Ball Joint Cap
LubricantHigh-Temperature Grease
(GM Part No. U.S. 1051344,
in Canada 903037) or NLGI #3
consistency.
Power Steering
SystemDEXRON
®-VI Automatic
Transmission Fluid.
Manual
TransmissionSynthetic Manual Transmission Fluid
(GM Part No. U.S. 88861952,
in Canada 88861953).
Automatic
TransmissionSee the Allison Transmission
®
Operator’s Manual for correct
transmission fluid.
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Usage Fluid/Lubricant
Key Lock
CylindersMulti-Purpose Lubricant, Superlube
(GM Part No. U.S. 12346241,
in Canada 10953474).
Chassis
LubricationChassis Lubricant
(GM Part No. U.S. 12377985,
in Canada 88901242) or lubricant
meeting requirements of NLGI #2,
Category LB or GC-LB.
Front Wheel
Bearings
(Except Oil
Filled Hubs)Wheel bearing lubricant meeting
requirements of NLGI #2,
Category GC or GC-LB
(GM Part No. U.S. 1051344,
in Canada 993037).
Front Wheel
Bearings with
Oil Filled HubsSAE 75W-90 Synthetic Axle
Lubricant for Medium Duty Trucks
(GM Part No. U.S. 89021675,
in Canada 10953512).
Transfer Case
(Four-Wheel
Drive)Manual Transmission Fluid
(GM Part No. U.S. 88861800,
in Canada 88861801).
Front Axle
(Four-Wheel
Drive)SAE 75W-90 Synthetic Axle
Lubricant for Medium Duty Trucks
(GM Part No. U.S. 89021675,
in Canada 10953512).Usage Fluid/Lubricant
Rear Axle and
Rear HubsSAE 75W-90 Synthetic Axle
Lubricant for Medium Duty Trucks
(GM Part No. U.S. 89021675,
in Canada 10953512).
Rear Axle Shift
Motor LubricantRefrigerant Oil
(GM Part No. U.S. 5416939,
in Canada 10953496).
Propshafts and
SplinesWheel bearing lubricant meeting
requirements of NLGI #2,
Category GC or GC-LB
(GM Part No. U.S. 1051344,
in Canada 993037).
Cab — Door
Hinges and
LatchesMulti-Purpose Lubricant, Superlube
(GM Part No. U.S. 12346241,
in Canada 10953474).
Weatherstrip
ConditioningWeatherstrip Lubricant
(GM Part No. U.S. 3634770,
in Canada 10953518) or
Dielectric Silicone Grease
(GM Part No. U.S. 12345579,
in Canada 992887).
Weatherstrip
SqueaksSynthetic Grease
with Teflon, Superlube
(GM Part No. U.S. 12371287,
in Canada 10953437).
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Part D: Maintenance Record
After the scheduled services are performed, record the date, odometer reading and who performed the service, and
any additional information from “Owner Checks and Services” on the following record pages. Also, you should
retain all maintenance receipts.
DateMiles/km Or
HoursServiced ByMaintenance Record
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DateMiles/km Or
HoursServiced ByMaintenance Record
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DateMiles/km Or
HoursServiced ByMaintenance Record
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DateMiles/km Or
HoursServiced ByMaintenance Record
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Customer Assistance and Information...............7-2
Customer Satisfaction Procedure......................7-2
Customer Assistance for Text Telephone
(TTY) Users...............................................7-4
Customer Assistance Offices............................7-4
GM Mobility Reimbursement Program................7-5
Roadside Assistance Program..........................7-5
Collision Damage Repair.................................7-6
Reporting Safety Defects..................................7-9
Reporting Safety Defects to the
United States Government............................7-9
Reporting Safety Defects to the
Canadian Government.................................7-9
Reporting Safety Defects to
General Motors...........................................7-9
Service Publications Ordering Information.........7-10Vehicle Data Recording and Privacy................7-11
Vehicle Data Recording and Privacy
(Isuzu 7.8L L6 Engine)...............................7-11
Event Data Recorders
(Isuzu 7.8L L6 Engine)...............................7-12
OnStar
®(Isuzu 7.8L L6 Engine)......................7-13
Navigation System (Isuzu
7.8L L6 Engine)........................................7-13
Radio Frequency Identification (RFID)
(Isuzu 7.8L L6 Engine)...............................7-13
Section 7 Customer Assistance Information
7-1
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Customer Assistance and
Information
Customer Satisfaction Procedure
Your satisfaction and goodwill are important to your
dealer and to Chevrolet. Normally, any concerns with the
sales transaction or the operation of the vehicle will be
resolved by the dealer’s sales or service departments.
Sometimes, however, despite the best intentions of all
concerned, misunderstandings can occur. If your concern
has not been resolved to your satisfaction, the following
steps should be taken:
STEP ONE:Discuss your concern with a member of
dealership management. Normally, concerns can be
quickly resolved at that level. If the matter has already
been reviewed with the sales, service or parts manager,
contact the owner of the dealership or the general
manager.STEP TWO:If after contacting a member of dealership
management, it appears your concern cannot be
resolved by the dealership without further help, call the
GM Medium Duty Truck Customer Assistance Center
at 1-800-862-4389. In Canada, call GM of Canada
Customer Communication Centre in Oshawa at
1-800-263-3777 (English), or 1-800-263-7854 (French).
We encourage you to call the toll-free number in
order to give your inquiry prompt attention. Have the
following information available to give the Customer
Assistance Representative:
•Vehicle Identification Number (VIN). This is
available from the vehicle registration or title, or the
plate at the top left of the instrument panel and
visible through the windshield.
•Dealership name and location.
•Vehicle delivery date and present mileage.
When contacting Chevrolet, remember that your
concern will likely be resolved at a dealer’s facility.
That is why we suggest following Step One first.
7-2