The FASTEN SEATBELTS indicator lamp will go on when one of the following conditions exist:

The FASTEN SEATBELTS indicator lamp will remain on until the driver's seatbelt is buckled.

For more information, refer to Audible Warnings Description Warning/Reminder Chimes.

The left or right turn signal indicator lamp will illuminate when the multi-function lever on the left side of the steering column is moved to signal a turn. The turn/hazard switch in the steering column receives an on-and-off flashing current from the fuse block and the turn signal flasher unit in the convenience center when the ignition switch is in one of the following positions:

When the multi-function lever is moved the turn/hazard switch routes the current to circuits that feed the following lamps:

The circuit to the left or right front turn signal lamp, and the cornering and sidemarker lamps has a branch that feeds the appropriate turn indicator lamp in the instrument cluster. This causes the lamps to flash when the exterior lamps are indicating a turn.

When the hazard warning button on the right side of the steering column is pressed in the following lamps in the instrument cluster flash:

Power for the hazard warning system reaches the turn/hazard switch from the fuse block and the hazard flasher in the convenience center. Power is supplied with the ignition switch in any position. When the hazard warning system is flashing, the turn signal circuits are inoperative.

The AIR BAG indicator lamp will light in order to warn the driver of a potential supplemental inflatable restraint (SIR) system problem that could prevent the proper deployment of the air bags in an accident. When the ignition switch is first turned on, the lamp will flash seven times. This flashing verifies the proper operation of the lamp circuit and the sensing and discriminating module (SDM). A scan tool can be used in order to read diagnostic trouble codes (DTCs) in the SDM and to clear all DTCs after repair. For additional information, including service precautions, refer to Supplemental Inflatable Restraints (SIR).

The SERVICE ENGINE SOON indicator lamp in the instrument cluster will come on when turning the ignition ON or OFF. This serves as a bulb and system check. The light should go off after the engine starts unless a problem has been detected by the system.

For diagnosis, refer to Engine Controls.

With a low coolant level, the circuit made by the low coolant probe has very high resistance (over 50,000 ohms). The low engine coolant indicator module senses the voltage change at the low coolant level input. The indicator module provides ground to the LOW COOLANT indicator and the indicator lights up. The LOW COOLANT indicator is grounded for 1.5 seconds when the ignition switch is initially turned the ON position, causing the LOW COOLANT indicator to light.

The LOW OIL indicator ground is controlled by the engine oil level indicator control module. In order to check for a low oil condition, the low oil module looks for a ground through the oil level switch. This is done after the ignition switch has been turned to the OFF or LOCK position.

The low oil module tests for a low oil condition as follows:

When the oil level is low, the low oil module loses the ground through the oil level switch. This means that the oil level switch is open, indicating low oil level. This action causes the low oil module to ground the LOW OIL indicator for the duration of the next ignition cycle.

When the low oil module is grounded through the oil level switch, the low oil module ground the LOW OIL indicator. This allows a bulb test when the ignition switch is turned to the RUN position during the next ignition cycle. The bulb test takes 4-5 seconds.

The OIL CHANGE light comes on for a 3 second bulb check when the vehicle is first started. The light stays on for 60 seconds after the vehicle is started the oil needs to be changed. The light may indicate to change the oil sooner than suggested in the maintenance schedule. The light comes on when the system predicts that the oil's remaining useful life is almost up. To reset the oil life monitor perform the following:

1. Turn the ignition to the RUN position.
2. Push and hold the TRIP/OIL RESET button for 12 seconds.
3. The OIL CHANGE light will start to flash to confirm the system is reset.
4. The reset is complete when the OIL CHANGE light goes out.

When the ignition switch is turned to the RUN position the BRAKE warning lamp will come on for approximately 3 seconds. If the parking brake is set, the lamp will remain on. The lamp may also be illuminated by information from the electronic brake control module (EBCM) to the electronic brake/traction control module (EBTCM).

The BRAKE warning lamp may be activated by the brake combo valve when the ignition switch is turned to one of the following positions:

For more information, refer to Engine Electrical.

The ABS INOP indicator lamp is part of the antilock brake system. When the ignition switch is turned to the RUN position, the ABS INOP lamp will turn on for approximately 3 seconds. The lamp will turn off if no ABS malfunction is detected. If a malfunction is detected, the lamp will remain on.

If the ABS INOP indicator lamp comes on while driving, there is a malfunction in the antilock brake system. For more information, refer to Antilock Brakes.

Chevrolet V8 Only

The accelerated slip regulation (ASR) system limits wheel spin if the ASR senses that one or both of the rear wheels begin to lose traction. When this happens, the ASR system works the rear brakes and reduces engine power in order to limit wheel spin.

The ASR indicator lamp will come on if one of the following conditions exist:

When the ignition switch is turned to the crank position the following lamps will come on:

These lights will remain on if the switch is held in the crank position.

The CHECK GAGES indicator lamp alerts the driver to inspect the instrument cluster gages when any of the following abnormalities are detected:

The indicator lamp also comes on for about one second after the ignition is placed into the BULB TEST position.

ASR and TCS Systems

On vehicles equipped with accelerated slip regulation (ASR) or traction control systems (TCS) the LOW TRAC indicator lamp comes on in order to indicate the following situations:

The LOW TRAC lamp will turn on during the following situations:

The LOW TRAC lamp will remain on for approximately 3 seconds and will then turn off.

The LOW TRAC indicator lamp also comes on when the antilock brake system (ABS) is adjusting brake pressure in order to help avoid a skid.

The SECURITY indicator lamp is part of the theft deterrent system. This lamp will come on if one of the following conditions exists:

V8 Manual Only

When the SKIP SHIFT indicator lamp is on the manual transmission can only be shifted from first gear to fourth gear. For more information on skip shift, refer to Engine Controls.

Pontiac V8 Only

The traction control system (TCS), if equipped, limits wheel spin if the TCS senses that one or both of the rear wheels are beginning to lose traction. When this happens, the TCS works the rear brakes and reduces engine power in order to limit wheel spin.

The TCS OFF indicator lamp will come on when one of the following conditions exists:

When the ignition switch is turned to the crank position the following lamps will come on:

These lamps will remain on if the switch is held in the crank position.

The SERVICE VEHICLE warning light comes on for a 3 second bulb check when the vehicle is first started. This light will stay on steady if there are certian non-emission related vehicle problems. These problems may not be obvious and may affect vehicle performance or durability.

The REDUCED ENG PWR warning light comes on for a 3 second bulb check when the vehicle is first started. When this light comes on a noticeable reduction in the vehicle's performance may occur. The vehicle may be driven at a reduced speed while the light is on. Acceleration and speed may be reduced.