This section outlines the emission warranties that General Motors provides for your vehicle in accordance with the U.S. Federal Clean Air Act. Defects in material or workmanship in GM emission parts may also be covered under the New Vehicle Limited Warranty Bumper-to-Bumper coverage. There may be additional coverage on GM diesel engine vehicles. In any case, the warranty with the broadest coverage applies.

What Is Covered

The parts covered under the emission warranty are listed under the "Emission Warranty Parts List" later in this section.

How to Determine the Applicable Emissions Control System Warranty

State and Federal agencies may require different emissions control systems warranties for light duty trucks depending on:

Do the following to determine emissions eligibility:

1. Locate the underhood emission control label located inside the engine compartment on the underside of the hood, on the air cleaner assembly, or on the engine.
2. The language on the bottom left side of the label will describe if equipped with a light, medium, or heavy duty emission control system.
3. All Light Duty Trucks are eligible for Federal Emissions Warranty Coverage. If the emissions control label contains language stating the vehicle is certified to California emissions standards, the vehicle is also eligible for California Emissions Warranty Coverage.

1. Federal Emission Control Warranty

Both the Emission Defect Warranty and the Emission Performance Warranty described next begin on the date the vehicle is first delivered or put into use and continues as follows:

Light Duty Truck Equipped With Light Duty Gasoline Engine

Light Duty Truck Equipped With Heavy Duty Gasoline Engine

Light Duty Truck Equipped With Heavy Duty Diesel Engine

Emission Defect Warranty

General Motors Corporation warrants to the owner that the vehicle:

Emission related defects in the genuine GM parts listed under Emission Parts Covered, including related diagnostic costs, parts and labor are covered by this warranty.

Emission Performance Warranty

Some states and/or local jurisdictions have established periodic vehicle Inspection and Maintenance (I/M) programs to encourage proper maintenance of your vehicle. If an EPA-approved I/M program is required in your area you may also be eligible for Emission Performance Warranty coverage when all of the following three conditions are met:

If all these conditions are met, GM warrants that your dealer will replace, repair, or adjust to GM specifications, at no charge to you, any of the parts listed under the "Emission Warranty Parts List" later in this section which may be necessary to cause your vehicle to conform to the applicable emission standards. Non-GM parts labeled "Certified to EPA Standards" are covered by the Emission Performance Warranty.

2. California Emission Control Warranty

This section outlines the emission warranties that General Motors provides for your vehicle in accordance with the California Air Resources Board. Defects in material or workmanship in GM emission parts may also be covered under the New Vehicle Limited Warranty Bumper-to-Bumper coverage. There may be additional coverage on GM diesel engine vehicles. In any case, the warranty with the broadest coverage applies.

This warranty applies if your vehicle meets both of the following requirements:

* Currently MA and VT only. Note: NY and ME have adopted California emission regulations, but not California warranty regulations. The Federal Emission Control Warranty applies in NY and ME.

Your Rights and Obligations (For Vehicles Subject to California Exhaust Emission Standards)

The California Air Resources Board and General Motors are pleased to explain the emission control system warranty on your 2003 vehicle. In California, new motor vehicles must be designed, equipped, and built to meet the states' stringent anti-smog standards. GM must warrant your vehicle's emission control system for the periods of time and mileage listed previously provided there has been no abuse, neglect, or improper maintenance of your vehicle. Your vehicle's emission control system may include parts such as the fuel injection system, ignition system, catalytic converter, and engine computer. Also included are hoses, belts, connectors, and other emission related assemblies.

Where a warrantable condition exists, GM will repair your vehicle at no cost to you including diagnosis, parts, and labor.

General Motors Warranty Coverage:

Any authorized GMC dealer will, as necessary under these warranties, replace, repair, or adjust to General Motors specifications any genuine GM parts that affect emissions.

The applicable warranty period shall begin on the date the vehicle is delivered to the first retail purchaser or, if the vehicle is first placed in service as a demonstrator or company vehicle prior to sale at retail, on the date the vehicle is placed in such service.

Owner's Warranty Responsibilities:

As the vehicle owner, you are responsible for the performance of the scheduled maintenance listed in your owner's manual. GM recommends that you retain all maintenance receipts for your vehicle, but GM cannot deny warranty solely for the lack of receipts or for your failure to ensure the performance of all scheduled maintenance.

You are responsible for presenting your vehicle to a GM dealer selling your vehicle line as soon as a problem exists. The warranted repairs should be completed in a reasonable amount of time, not to exceed 30 days.

As the vehicle owner, you should also be aware that GM may deny you warranty coverage if your vehicle or a part has failed due to abuse, neglect, improper or insufficient maintenance, or modifications not approved by GM.

If you have any questions regarding your rights and responsibilities under these warranties, you should contact the Customer Assistance Center at 1-800-GMC-8782 (462-8782) or, in California, write to:

State of California Air Resources Board
Mobile Source Operations Division
P.O. Box 8001
El Monte, CA 91731-2990

What Is Covered

The parts covered under the Emission Control Systems Warranties are listed under the "Emission Warranty Parts List" later in this section.

What Is Not Covered

The Emission Control Systems Warranties obligations do not apply to conditions resulting from tampering, abuse, neglect, or improper maintenance; or any other item listed under "What Is Not Covered" under General Motors Corporation New Vehicle Limited Warranty . The "Other Terms" presented under General Motors Corporation New Vehicle Limited Warranty also apply to the emission related warranties.

3. Emission Warranty Parts List

The parts that may affect your vehicle's emissions are on the following pages. These emission parts covered under emission warranties are as follows:

Important: Certain parts may be covered beyond these warranties if shown with asterisk(s) as follows:

Powertrain Control System

Barometric Pressure Sensor

Brake Switch

Camshaft Position Actuator Assembly *

Camshaft Position Actuator Valve

Coolant Fan Control Relay

Coolant Level Sensor

Data Link Connector

Electronic Throttle Control (ETC) Motor

Engine Control Module (ECM) **

Engine Coolant Temp. Sensor

Fast Idle Solenoid

Flexible Fuel Sensor *

Intake Air Temperature Sensor

Malfunction Indicator Lamp

Manifold Absolute Pressure Sensor

Mass Air Flow Sensor (7/70 Tracker Only *)

Oxygen Sensors

Powertrain Control Module (PCM) **

Programmable Read Only Memory (PROM)

Throttle Position Sensor

Throttle Position Switch

Vehicle Control Module (VCM) **

Vehicle Speed Sensor

Transmission Controls and Torque Management

Manual Transmission Clutch Switch

Torque Converter Clutch Switch

Torque Converter Clutch Solenoids

Transmission Control Module **

Transmission Gear Selection Switch (Diesel)

Transmission Internal Mode Switch

Transmission Speed Sensors

Fuel Management System

Common Rail Assembly (6.6L Duramax Diesel) *

Diesel Fuel Injection Pump *

Diesel Fuel Injection Pump Timing Adjust

Diesel Fuel Injector Control Module - EDU (6.6L Duramax Diesel) *

Diesel Fuel Temperature Sensor

Direct Fuel Injector Assembly (6.6L Duramax Diesel) *

Function Block (6.6L Duramax Diesel)

Fuel Injector

Fuel Pressure Regulator

Fuel Rail Assembly

Fuel Rail Sensor (6.6L Duramax Diesel)

Air Management System

Air Cleaner

Air Cleaner Diaphragm Motor

Air Cleaner Resonator

Air Cleaner Temp. Compensator Valve

Air Intake Ducts

Charge Air Control Actuator

Charge Air Control Solenoid Valve

Charge Air Control Valve

Charge Air Cooler (6.6L Duramax Diesel) *

Charge Air Cooler Fan

Idle Air Control Valve

Idle Speed Control Motor

Intake Manifold *

Intake Manifold Tuning Valve

Intake Manifold Tuning Valve Relay

Supercharger Assembly *

Throttle Body *

Throttle Body Heater

Throttle Closing Dashpot

Turbocharger Assembly *

Turbocharger Boost Sensor (6.6L Duramax Diesel)

Turbocharger Oil Separator

Turbocharger Thermo Purge Switch

Vacuum Pump (6.6L Duramax Diesel)

Ignition System

Camshaft Position Sensor(s)

Crankshaft Position Sensor(s)

Distributor *

Distributor Cap

Distributor Pick Up Coil

Distributor Rotor

Glow Plug(s) (Diesel)

Glow Plug Controller (Diesel)

Glow Plug Relay (Diesel)

Ignition Coil(s)

Ignition Control Module

Ignition Timing Adjustment

Knock Sensor

Spark Plug Wires

Spark Plugs

Catalytic Converter System

Catalytic Converter(s) and Muffler if attached as assembly **

Exhaust Manifold (7/70 Only Cadillac 4.6L, Aurora 4.0L, C/K Truck <14,000 GVWR 8.1L*)

Exhaust Manifold with Catalytic Converter attached **

Exhaust Manifold Gasket

Exhaust pipes and/or Mufflers (when located between catalytic converters and exhaust manifold)

Positive Crankcase Ventilation System

Oil Filler Cap

PCV Filter

PCV Oil Separator

PCV Valve

Exhaust Gas Recirculation System

EGR Feed and Delivery Pipes or Cast-in Passages

EGR Valve

EGR Valve Cooler (6.6L Duramax Diesel)

EGR Vacuum Pump Assembly (6.6L Duramax Diesel)

Secondary Air Injection System

Air Pump

Cutoff Valve

Check Valves

Vacuum Control Solenoid

Evaporative Emission Control System (Gasoline Engines)

Canister

Canister Purge Solenoid Valve

Canister Vent Solenoid

Fuel Feed and Return Pipes and Hoses

Fuel Filler Cap

Fuel Limiter Vent Valve *

Fuel Tank Filler Pipe (with restrictor)

Fuel Tank(s) *

Fuel Tank Vacuum or Pressure Sensor

Miscellaneous Items Used with Above Components are Covered

Belts

Boots

Clamps

Connectors

Ducts

Fittings

Gaskets

Grommets

Hoses

Housings

Mounting Hardware

Pipes

Pulleys

Sealing Devices

Springs

Tubes

Wiring

* 7 years/70,000 miles, whichever comes first, California emission coverage.

** 8 years/80,000 miles, whichever comes first, Federal emission coverage. (Also applies to California Certified Light Duty and Medium Duty Vehicles.)

Parts specified in your maintenance schedule as requiring scheduled replacement are covered up to their first replacement interval or the applicable emission warranty coverage period, whichever comes first. If failure of one of these parts results in failure of another part, both will be covered under the Emission Control System warranties.

If equipped, items marked with an asterisk are covered by the California long-term emission control system Defects Warranty for 7 years/70,000 miles. (For example, if one of these parts causes a smog check failure after the 3 year/50,000 mile performance warranty has expired, the part is still covered for 7 years/70,000 miles.)

For detailed information concerning specific parts covered by these emission control system warranties, ask your dealer.

4. Things You Should Know About the Emission Control Systems Warranties

Replacement Parts

The emission control systems of your vehicle were designed, built, and tested using genuine GM parts* and the vehicle is certified as being in conformity with applicable federal and California emission requirements. Accordingly, it is recommended that any replacement parts used for maintenance or for the repair of emission control systems be new, genuine GM parts.

The warranty obligations are not dependent upon the use of any particular brand of replacement parts. The owner may elect to use non-genuine GM parts for replacement purposes. Use of replacement parts which are not of equivalent quality may impair the effectiveness of emission control systems.

If other than new, genuine GM parts are used for maintenance replacements or for the repair of parts affecting emission control, the owner should assure himself/herself that such parts are warranted by their manufacturer to be equivalent to genuine GM parts in performance and durability.

* "genuine GM parts," when used in connection with GM vehicles means parts manufactured by or for GM, designed for use on GM vehicles and distributed by any division or subsidiary of General Motors Corporation.

Maintenance and Repairs

Maintenance and repairs can be performed by any qualified service outlet; however, warranty repairs must be performed by an authorized dealer except in an emergency situation when a warranted part or a warranty station is not reasonably available to the vehicle owner.

In an emergency, where an authorized dealer is not reasonably available, repairs may be performed at any available service establishment or by the owner, using any replacement part. GMC will consider reimbursement for the expense incurred (including diagnosis), not to exceed the manufacturer's suggested retail price for all warranted parts replaced and labor charges based on GMC's recommended time allowance for the warranty repair and the geographically appropriate labor rate. A part not being available within 10 days or a repair not being completed within 30 days constitutes an emergency. Retain receipts and failed parts in order to receive compensation for warranty repairs reimbursable due to an emergency.

If, in an emergency situation, it is necessary to have repairs performed by other than a GMC dealer and you believe the repairs are covered by emission warranties, take the replaced parts and your receipt to a GMC dealer for reimbursement consideration. This applies to both the Emission Defect Warranty and Emission Performance Warranty.

Receipts and records covering the performance of regular maintenance or emergency repairs should be retained in the event questions arise concerning maintenance. These receipts and records should be transferred to each subsequent owner. GM will not deny warranty coverage solely on the absence of maintenance records. However, GM may deny a warranty claim if a failure to perform scheduled maintenance resulted in the failure of a warranty part.

Claims Procedure

As with the other warranties covered in this booklet, take your vehicle to any authorized GMC dealer facility to obtain service under the emission warranties. This should be done as soon as possible after failing an EPA-approved I/M test or a California smog check test, or at any time you suspect a defect in a part.

Those repairs qualifying under the warranty will be performed by any GMC dealer at no charge. Repairs which do not qualify will be charged to you. You will be notified as to whether or not the repair qualifies under the warranty within a reasonable time (not to exceed 30 days after receipt of the vehicle by the dealer, or within the time period required by local or state law).

The only exceptions would be if you request or agree to an extension, or if a delay results from events beyond the control of your dealer or GM. If you are not so notified, GM will provide any required repairs at no charge. In the event a warranty matter is not handled to your satisfaction, refer to the "Customer Satisfaction Procedure" in this booklet under Owner Assistance .

For further information or to report violations of the emission control systems warranties, you may contact the EPA at:

Manager, Certification and Compliance
Division (6405J)
Warranty Claims
Environmental Protection Agency
Ariel Rios Building
1200 Pennsylvania Avenue, N.W.
Washington, DC 20460

For a vehicle subject to the California Exhaust Emission standards, you may contact the:

State of California Air Resources Board
Mobile Source Operations Division
P.O. Box 8001
El Monte, CA 91731-2990