These owner checks and services should be performed at the intervals specified to help ensure the safety, dependability and emission control performance of your vehicle. Your GM Goodwrench dealer can assist you with these checks and services

Be sure any necessary repairs are completed at once. Whenever any fluids or lubricants are added to your vehicle, make sure they are the proper ones, refer to Fluid and Lubricant Recommendations

For vehicles with dual wheels, check dual wheel nut torque. For proper torque, refer to Fastener Tightening Specifications .

It is important to perform these underhood procedures at each fuel fill.

Engine Oil Level

Inspect the engine oil level and add the proper oil if necessary. In order to select the proper fluids and lubricants, refer to Fluid and Lubricant Recommendations .

Notice: It is important to check the engine oil regularly and keep it at the proper level. Failure to keep the engine oil at the proper level can cause damage to the engine not covered by the vehicle warranty.

Engine Coolant Level

Check the engine coolant levels and add DEX-COOL® coolant mixture if necessary. Refer to Fluid and Lubricant Recommendations .

Windshield Washer Fluid Level

Check the windshield washer fluid level in the windshield washer tank and add the proper fluid if necessary. Refer to Fluid and Lubricant Recommendations .

Tire Inflation

Check tire inflation. Make sure the tires are inflated to the pressures specified on the Certification/Tire label located on the driver door lock pillar. Refer to Vehicle Certification Label .

Caution: When you are doing this inspection, the vehicle could move suddenly. If the vehicle moves, you or others could be injured.

Starter Switch Check

On manual transmission vehicles, put the shift lever in NEUTRAL (N), push the clutch down halfway and try to start the engine. The starter should work only when the clutch is pushed down all the way to the floor. If the starter works when the clutch is not pushed all the way down, the vehicle needs service.

Automatic Transmission Shift Lock Control Check

1. Before you start, be sure you have enough room around the vehicle. It should be parked on a level surface.

Important: Be ready to apply the regular brake immediately if the vehicle begins to move.

2. Firmly apply the parking brake.
3. With the engine off, turn the key to the RUN position, but don't start the engine.
4. Without applying the regular brake, try to move the shift lever out of PARK (P) with normal effort.
5. If the shift lever moves out of PARK (P), the vehicle needs service.

Ignition Transmission Lock Check

1. With the vehicle parked, set the parking brake.
2. Try to turn the ignition key to LOCK in each shift lever position.
3. With an automatic transmission, the key should turn to LOCK only when the shift lever is in PARK (P).
4. With a manual transmission, the key should turn to LOCK only when you press the key release button.
5. On all vehicles, the key should come out only in LOCK.

Park Brake and Automatic Transmission PARK (P) Mechanism Check

Caution: When you are doing this check, the vehicle could begin to move. You or others could be injured and property could be damaged. Make sure there is room in front of the vehicle in case it begins to roll. Be ready to apply the regular brake at once should the vehicle begin to move.

Follow this procedure to test the park brake and automatic transmission PARK mechanism:

Underbody Flushing Service

At least every spring, use plain water to flush any corrosive materials from the underbody. Take care to clean thoroughly any areas where mud and other debris can collect.