GM Service Manual Online
For 1990-2009 cars only

Your vehicle has an electronic shift position indicator within the instrument panel cluster.


Object Number: 1736632  Size: B1

When using the Electronic Range Select Mode a number will display next to the L, indicating the current gear that has been selected.

See Electronic Range Select mode in this section for more information.

Your automatic transmission has a shift lever located on the console between the seats.

PARK (P): This position locks your front wheels. It is the best position to use when you start your 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 .

Make sure 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 brake first and then press the shift lever button before you can shift from PARK (P) when the ignition key is in ON. If you cannot shift out of PARK (P), ease pressure on the shift lever, then push the shift lever all the way into PARK (P) as you maintain brake application. Then press the shift lever button and move the shift lever into another gear. See Shifting Out of Park .

REVERSE (R): Use this gear to back up.

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.

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 .

NEUTRAL (N): In this position, your engine does not connect with the wheels. To restart when you are already moving, use NEUTRAL (N) only. 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.

DRIVE (D): This position is for normal driving. It provides the best fuel economy for your vehicle. If you need more power for passing, and you are:

    • Going less than 35 mph (56 km/h), push your accelerator pedal about halfway down.
    • Going about 35 mph (56 km/h) or more, push the accelerator all the way down.

Notice: If your vehicle seems to accelerate slowly or not shift gears when you go faster, and you continue to drive your vehicle that way, you could damage the transmission. Have your vehicle serviced right away. You can drive in LOW (L) when you are driving less than 35 mph (56 km/h) and DRIVE (D) for higher speeds until then.

LOW (L): This position gives you access to gear ranges. This provides more engine braking but lower fuel economy than DRIVE (D). You can use it on very steep hills, or in deep snow or mud.

Electronic Range Select Mode

Electronic Range Selector (ERS) mode allows you to choose the top-gear limit of the vehicle's transmission and the vehicle's speed while driving down hill or towing a trailer.

To use this feature, do the following:

  1. Move the shift lever to LOW (L).

  2. Object Number: 1856898  Size: A3
  3. Press the plus/minus button located on the shift lever, to increase or decrease the gear range available based upon your current driving conditions and needs.

When you shift from DRIVE (D) to LOW (L), the transmission will shift to a pre-determined lower gear range . The highest gear available for this pre-determined range is displayed next to the L in the DIC. See Driver Information Center (DIC) and DIC Operation and Displays for more information. The number displayed in the DIC is the highest gear that the transmission will be allowed to operate in. However, your vehicle can automatically shift to lower gears as required by various driving conditions. This means that all gears below that number are available. For example, when FOURTH (4) is shown next to the L, FIRST (1) through FOURTH (4) gears are automatically shifted by the vehicle. You cannot shift into FIFTH (5) until the plus (+) button is used or you shift back into DRIVE (D) mode.

While in LOW (L), the transmission will prevent shifting to a lower gear range if the engine speed is too high for the gear range you are trying to select. You have a brief period of time to slow the vehicle speed. If vehicle speed is not reduced within the timeframe allowed, the lower gear range attempted will not be available. The highest possible gear that is allowed for that engine speed will display next to the L in the DIC. Try again to slow the vehicle speed and press the minus (-) button to the desired lower gear range.

Automatic Engine Grade braking is not available when the ERS is active. It is available in DRIVE (D) for both normal and Tow/Haul mode. While using the ERS, cruise control and the tow/haul mode can be used. See Tow/Haul Mode for more information.