GM Service Manual Online
For 1990-2009 cars only

Automatic Transmission Operation 5-Speed Automatic

The shift lever is located on the center console between the front seats.


Object Number: 1577380  Size: A2

There are several different positions for the shift lever.

PARK (P): This position locks the rear wheels. It is the best position to use when you start the engine because your vehicle cannot move easily.

Caution: It is dangerous to get out of the vehicle if the shift lever is not fully in P (Park) with the parking brake firmly set. The vehicle can roll.

Do not leave the vehicle when the engine is running unless you have to. If you have left the engine running, the vehicle can move suddenly. You or others could be injured. To be sure the vehicle will not move, even when you are on fairly level ground, always set the parking brake and move the shift lever to P (Park). See Shifting Into Park . If you are pulling a trailer, see Towing a Trailer .

Ensure the shift lever is fully in PARK (P) before starting the engine. Your vehicle has an automatic transmission shift lock control system. You must fully apply your regular brakes before you can shift from PARK (P) when the ignition is on. If you cannot shift out of PARK (P), ease pressure on the shift lever. Push the shift lever all the way into PARK (P) while pressing the button on the shift lever as you maintain brake application. Then move the shift lever into the gear you wish. See Shifting Out of Park .

Notice: Shifting to R (Reverse) while the vehicle is moving forward could damage the transmission. The repairs would not be covered by the vehicle warranty. Shift to R (Reverse) only after the vehicle is stopped.

REVERSE (R):  Use this gear to back up. At low vehicle speeds, you can also use REVERSE (R) to rock your vehicle back and forth to get out of snow, ice or sand without damaging your transmission. See If Your Vehicle is Stuck in Sand, Mud, Ice, or Snow for additional information.

NEUTRAL (N): In this position, the engine does not connect with the wheels. To restart when you are already moving, use NEUTRAL (N) only. You can also use NEUTRAL (N) when your vehicle is being towed.

Caution: Shifting into a drive gear while the engine is running at high speed is dangerous. Unless your foot is firmly on the brake pedal, the vehicle could move very rapidly. You could lose control and hit people or objects. Do not shift into a drive gear while the engine is running at high speed.

Notice: Shifting out of P (Park) or N (Neutral) with the engine running at high speed may damage the transmission. The repairs would not be covered by the vehicle warranty. Be sure the engine is not running at high speed when shifting the vehicle.

AUTOMATIC OVERDRIVE (D): This position is for normal driving. If you need more power for passing, and you are:

    • Going less than 35 mph (55 km/h), push the accelerator pedal about halfway down.
    • Going about 35 mph (55 km/h) or more, push the accelerator all the way down.
        The transmission will shift down to a lower gear and have more power.

Notice: Spinning the tires or holding the vehicle in one place on a hill using only the accelerator pedal may damage the transmission. If you are stuck, do not spin the tires. When stopping on a hill, use the brakes to hold the vehicle in place.

FOURTH (4): This position is also used for normal driving. However, it offers more power and lower fuel economy than AUTOMATIC OVERDRIVE (D).

Here are examples for using FOURTH (4) instead of AUTOMATIC OVERDRIVE (D):

    • When driving on hilly, winding roads.
    • When going down a steep hill.

This position may also offer improved trailer towing performance in certain driving conditions.

Driver Shift Control (DSC)

Notice: If you drive the vehicle at high RPMs without upshifting while using Driver Shift Control (DSC), you could damage the vehicle. Always upshift when necessary while using DSC.

Your automatic transmission has a Driver Shift Control (DSC) feature that allows you to change gears similar to a manual transmission. To use the DSC feature:

  1. Slide the shift lever over from AUTOMATIC OVERDRIVE (D) to the right into the DSC area.

  2. Object Number: 1604272  Size: A2

    When the transmission is in DSC mode the sport symbol in the Driver Information Center (DIC) will come on.

  3. If you do not move the shift lever forward or rearward, the vehicle will be in sport mode. When you are in the sport mode the vehicle will still shift automatically. While driving in sport mode, the transmission may remain in a gear longer than it would in normal driving mode based on braking, throttle input and vehicle lateral acceleration.
  4. Press the shift lever forward to upshift or rearward to downshift.

Object Number: 1604274  Size: A2

The DIC will show the requested gear range when moving the shift lever forward or rearward. See Driver Information Center (DIC) for more information on the DIC.

While using the DSC feature the vehicle will have firmer shifting and increased performance. You can use this for sport driving or when climbing/descending hills to stay in gear longer or to down shift for more power or engine braking.

The transmission will only allow you to shift into gears appropriate for the vehicle speed and engine Revolutions Per Minute (RPM). The transmission will not automatically shift to the next higher gear if the engine rpm is too high.

If shifting is prevented for any reason, the currently selected gear will flash multiple times in the DIC, indicating that the transmission has not shifted gears.

The transmission will allow you to shift to the gear selected and will automatically downshift when the vehicle comes to a stop. This will allow for more power during take-off and passing.

When accelerating your vehicle from a stop in snowy and icy conditions, you may want to shift into second gear. A higher gear ratio allows you to gain more traction on slippery surfaces.

Automatic Transmission Operation 6-Speed Automatic

The shift lever is located on the center console between the front seats.


Object Number: 1604102  Size: A2

There are several different positions for the shift lever.

PARK (P): This position locks the rear wheels. It is the best position to use when you start the engine because your vehicle cannot move easily.

Caution: It is dangerous to get out of the vehicle if the shift lever is not fully in P (Park) with the parking brake firmly set. The vehicle can roll.

Do not leave the vehicle when the engine is running unless you have to. If you have left the engine running, the vehicle can move suddenly. You or others could be injured. To be sure the vehicle will not move, even when you are on fairly level ground, always set the parking brake and move the shift lever to P (Park). See Shifting Into Park . If you are pulling a trailer, see Towing a Trailer .

Ensure the shift lever is fully in PARK (P) before starting the engine. Your vehicle has an automatic transmission shift lock control system. You must fully apply your regular brakes before you can shift from PARK (P) when the vehicle is running. If you cannot shift out of PARK (P), ease pressure on the shift lever. Push the shift lever all the way into PARK (P) while pressing the button on the shift lever as you maintain brake application. Then move the shift lever into the gear you wish. See Shifting Out of Park .

Notice: Shifting to R (Reverse) while the vehicle is moving forward could damage the transmission. The repairs would not be covered by the vehicle warranty. Shift to R (Reverse) only after the vehicle is stopped.

REVERSE (R):  Use this gear to back up. At low vehicle speeds, you can also use REVERSE (R) to rock your vehicle back and forth to get out of snow, ice, or sand without damaging your transmission. See If Your Vehicle is Stuck in Sand, Mud, Ice, or Snow for additional information.

NEUTRAL (N): In this position, the engine does not connect with the wheels. To restart when you are already moving, use NEUTRAL (N) only. You can also use NEUTRAL (N) when your vehicle is being towed.

Caution: Shifting into a drive gear while the engine is running at high speed is dangerous. Unless your foot is firmly on the brake pedal, the vehicle could move very rapidly. You could lose control and hit people or objects. Do not shift into a drive gear while the engine is running at high speed.

Notice: Shifting out of P (Park) or N (Neutral) with the engine running at high speed may damage the transmission. The repairs would not be covered by the vehicle warranty. Be sure the engine is not running at high speed when shifting the vehicle.

AUTOMATIC OVERDRIVE (D): This position is for normal driving. If you need more power for passing, and you are:

    • Going less than 35 mph (55 km/h), push the accelerator pedal about halfway down.
    • Going about 35 mph (55 km/h) or more, push the accelerator all the way down.
        The transmission will shift down to a lower gear and have more power.

Driver Shift Control (DSC)

Notice: If you drive the vehicle at high RPMs without upshifting while using Driver Shift Control (DSC), you could damage the vehicle. Always upshift when necessary while using DSC.

Your automatic transmission has a Driver Shift Control (DSC) feature that allows you to change gears similar to a manual transmission. To use the DSC feature:

  1. Slide the shift lever over from AUTOMATIC OVERDRIVE (D) to the right into the DSC area.

  2. Object Number: 1604272  Size: A2

    When the transmission is in DSC mode the sport symbol in the Driver Information Center (DIC) will come on.

  3. If you do not move the shift lever forward or rearward, the vehicle will be in sport mode. When you are in the sport mode the vehicle will still shift automatically. While driving in sport mode, the transmission may remain in a gear longer than it would in normal driving mode based on braking, throttle input, and vehicle lateral acceleration.
  4. Press the shift lever forward to upshift or rearward to downshift.

Object Number: 1604274  Size: A2

The DIC will show the requested gear range when moving the shift lever forward or rearward. See Driver Information Center (DIC) for more information on the DIC.

While using the DSC feature the vehicle will have firmer shifting and increased performance. You can use this for sport driving or when climbing/descending hills to stay in gear longer or to down shift for more power or engine braking.

The transmission will only allow you to shift into gears appropriate for the vehicle speed and engine Revolutions Per Minute (RPM). The transmission will not automatically shift to the next higher gear if the engine rpm is too high.

If shifting is prevented for any reason, the currently selected gear will flash multiple times, indicating that the transmission has not shifted gears.

The transmission will allow you to shift to the gear selected and will automatically downshift when the vehicle comes to a stop. This will allow for more power during take-off and passing.

When accelerating your vehicle from a stop in snowy and icy conditions, you may want to shift into second gear. A higher gear ratio allows you to gain more traction on slippery surfaces.