GM Service Manual Online
For 1990-2009 cars only

Move the shift lever to P (Park) or N (Neutral). The engine will not start in any other position. To restart the engine when the vehicle is already moving, use N (Neutral) only.

Notice: Do not try to shift to P (Park) if the vehicle is moving. If you do, you could damage the transmission. Shift to P (Park) only when the vehicle is stopped.

Starting Procedure

  1. With your foot off the accelerator pedal, turn the ignition to START. When the engine starts, let go of the key. The idle speed will slow down as the engine warms. Do not race the engine immediately after starting it. Operate the engine and transmission gently to allow the oil to warm up and lubricate all moving parts.
  2. The vehicle has a Computer-Controlled Cranking System. This feature assists in starting the engine and protects components. If the ignition key is turned to the START position, and then released when the engine begins cranking, the engine will continue cranking for a few seconds or until the vehicle starts. If the engine does not start and the key is held in START, cranking will be stopped after 15 seconds to prevent cranking motor damage. To prevent gear damage, this system also prevents cranking if the engine is already running. Engine cranking can be stopped by turning the ignition switch to the ACC/ACCESSORY or LOCK/OFF position.

    Notice: Cranking the engine for long periods of time, by returning the key to the START position immediately after cranking has ended, can overheat and damage the cranking motor, and drain the battery. Wait at least 15 seconds between each try, to let the cranking motor cool down.

  3. If the engine does not start after 5-10 seconds, especially in very cold weather (below 0°F or -18°C), it could be flooded with too much gasoline. Try pushing the accelerator pedal all the way to the floor and holding it there as you hold the key in START for up to a maximum of 15 seconds. Wait at least 15 seconds between each try, to allow the cranking motor to cool down. When the engine starts, let go of the key and accelerator. If the vehicle starts briefly but then stops again, repeat these steps. This clears the extra gasoline from the engine. Do not race the engine immediately after starting it. Operate the engine and transmission gently until the oil warms up and lubricates all moving parts.

Notice: The engine is designed to work with the electronics in the vehicle. If you add electrical parts or accessories, you could change the way the engine operates. Before adding electrical equipment, check with your dealer/retailer. If you do not, the engine might not perform properly. Any resulting damage would not be covered by the vehicle warranty.

Starting the Engine Automatic Engine Start/Stop

The shift lever must be in P (Park) or N (Neutral) for the vehicle to start. To restart the engine when the vehicle is already moving, use N (Neutral) only.

Notice: Do not try to shift to P (Park) if the vehicle is moving. If you do, you could damage the transmission. Shift to P (Park) only when the vehicle is stopped.

Starting Procedure

  1. With your foot off the accelerator pedal, turn the ignition key to START. When the engine starts, let go of the key. The idle speed goes down as your engine gets warm. Do not race the engine immediately after starting it. Operate the engine and transmission gently to allow the oil to warm up and lubricate all moving parts.
  2. The vehicle has a Computer-Controlled Cranking System. This feature assists in starting the engine and protects components. If the key is turned to the START position, and then released when the engine begins cranking, the engine continues cranking for a few seconds or until the vehicle starts. If the engine does not start and the key is held in START, cranking stops after 15 seconds to prevent cranking motor damage. To prevent gear damage, this system also prevents cranking if the engine is already running. Engine cranking can be stopped by turning the ignition switch to the ACC/ACCESSORY or LOCK/OFF position.

    Notice: Cranking the engine for long periods of time, by returning the key to the START position immediately after cranking has ended, can overheat and damage the cranking motor, and drain the battery. Wait at least 15 seconds between each try, to let the cranking motor cool down.

  3. If the engine does not start after 5-10 seconds, especially in very cold weather (below 0°F or -18°C), it could be flooded with too much gasoline. Try pushing the accelerator pedal all the way to the floor and holding it there as you hold the key in START for up to a maximum of 15 seconds. Wait at least 15 seconds between each try, to allow the cranking motor to cool down. When the engine starts, let go of the key and accelerator. If the vehicle starts briefly but then stops again, do the same thing. This clears the extra gasoline from the engine. Do not race the engine immediately after starting it. Operate the engine and transmission gently until the oil warms up and lubricates all moving parts.

Notice: Your engine is designed to work with the electronics in your vehicle. If you add electrical parts or accessories, you could change the way the engine operates. Before adding electrical equipment, check with your dealer/retailer. If you do not, your engine might not perform properly. Any resulting damage would not be covered by your vehicle's warranty.

Automatic Engine Start/Stop

Caution: Exiting the vehicle, without first shifting into P (Park), may cause the vehicle to move, you or others may be injured. Because the vehicle has the Automatic Engine Start/Stop feature, the vehicle's engine might seem to be shut off, however, once the brake pedal is released, the engine will start up again.

Shift to P (Park) and turn the ignition to LOCK/OFF, before exiting the vehicle.

The vehicle has an automatic engine start/stop feature. After the engine is started and has reached operating temperature, the AUTO STOP feature may cause the engine to turn off when you apply the brakes and come to a complete stop. When you take your foot off the brake pedal or press the accelerator pedal, the engine will start. The engine will continue to run until the next AUTO STOP.

The AUTO STOP symbol on the tachometer signifies that the engine is in AUTO STOP mode. See Auto Stop Mode for more information. When the vehicle is turned off, the tachometer will move to OFF. If the driver door is opened while in AUTO STOP mode, a chime will sound.

To restart the engine during the AUTO STOP, release the brake pedal or press the accelerator pedal. The engine starts immediately. The vehicle continues to run until the next stop.

There are several conditions which may prevent an AUTO STOP or cause an AUTO START.

The Engine Will Remain Running When:

    • The engine, transmission, or hybrid battery is not warmed up yet.
    • The outside temperature is less than 5°F (-15°C).
    • While the A/C is in Normal Mode.
    • A/C is in Hybrid Mode and the climate control system is working to cool the vehicle. See Automatic Climate Control System for more information.
    • Defrost is selected.
    • The shift lever is in P (Park), N (Neutral), R (Reverse), I (Intermediate) or L (Low).
    • The hybrid battery pack charge is low.
    • The 12V vehicle battery charge is low, or loads are high.
    • The hood is not fully closed.

The Engine Will Restart When:

    • The brake pedal is released.
    •  The accelerator pedal is applied.
    • When shifting out of D (Drive) to any other gear.
    • If the Hybrid A/C button is selected, the duration of the AUTO STOP will depend on the outside temperature. This economy mode improves fuel economy by limiting the effects of the air conditioning. The warmer it is outside, the shorter the time before the engine is restarted to provide cabin cooling.
    • The climate control system is turned from Off to Normal A/C or defrost See Automatic Climate Control System for more information.
    • The engine is required to run for either heater or climate control performance. See "Air Conditioning Engine Start/Stop" under Automatic Climate Control System for more information.
    • The hybrid battery pack charge is low and requires recharging.
    • Auto Stop time is greater than two minutes.