How to Change the Oil in Pontiac Carsby Contributing WriterUpdated June 12, 2017
Changing your engine oil in your Pontiac car is do-it-yourself maintenance that can save you the cost of taking your vehicle to a mechanic. Changing the oil in the Pontiac car van is similar to changing the oil in any other gasoline engine, requiring a few tools and basic mechanical knowledge. Fortunately the Pontiac car employs an oil life system meter on the instrument cluster that notifies you when to change the oil.
Under The Hood:
- How to Change the Oil in a 2005 Pontiac Montana
- How to Change the Oil in a 2006 Pontiac G6
- How to Change the Oil in a 2006 Grand Prix
- How to Change the Oil on a Pontiac Grand Prix
Drive the Pontiac Montana for approximately five to 10 minutes to warm up the engine oil. This makes the oil less viscous, making it easier to drain.
Park the Montana on a flat, even surface and shut the engine off. Engage the emergency brake.
Place a hydraulic jack beneath the front jack point. Lift the front of the van and place jack stands on the front side jack points, located behind the front wheels.
Put on Nitrile gloves and safety glasses. Gloves reduce mess and safety glasses protect your eyes in case any oil splashes in your face.
Slide beneath the Montana and locate the oil drain plug on the bottom of the engine oil pan. Position an oil drain receptacle beneath the drain plug.
Remove the oil drain plug with a 12mm wrench. Ensure the oil is draining into the oil drain receptacle. Open the hood and unscrew the oil fill cap on the top of the engine; this helps the oil drain easier. Allow the engine oil to completely drain out of the vehicle; this usually takes 30 minutes to one hour.
Locate the oil filter beneath the Montana. Position the oil drain receptacle beneath the old oil filter.
Turn the oil filter counterclockwise to remove it. Use an oil filter removal tool if you are having trouble removing the filter. Turn the oil filter upside down and allow the oil in the filter to drain out into the oil drain receptacle. Enclose the old filter in a plastic bag and throw it away.
Dip your finger in the new engine oil and rub it along the rubber seal on the new oil filter. This conditions the seal to help prevent leakage.
Clean the oil filter mating surface with a rag or shop towel.
Insert the new oil filter on the oil filter post and screw clockwise until tight. Turn it an additional 1/2 turn to ensure tightness. Do not over tighten or you may damage the rubber seal.
Clean the oil drain plug with a rag or shop towel. Clean the bottom of the engine oil pan.
Place a new washer on the oil drain plug and insert it back into the oil pan. Tighten the oil drain plug to 25 or 30 foot pounds of torque, using a torque wrench.
Open the oil fill cap and add four quarts of 5W-30 oil. Use a funnel if necessary to add engine oil.
Remove the oil drain receptacle from beneath the engine and lower the vehicle.
Reset the oil life system light by pressing the "Trip/Reset" button on the dash until "Oil" displays on the driver information system on the instrument cluster. Turn the key to the "Run" position and press the "Trip/Reset" button for five seconds.
Items you will need
Oil drain receptacle
Rag or shop towel
Oil filter removal tool
Disposable plastic bag
PF-47 replacement oil filter
5W-30 engine oil, 4.0 quarts
Park your G6 on firm, level ground. Apply the parking brake and chock the rear wheels.
Remove the engine oil fill cap from the top of the engine. Grasp and pull up on the lower right corner of the intake manifold cover to disengage the retaining clips holding the cover to the air cleaner outlet duct. Grasp and pull up on the left side of the cover to disengage it from the studs, then remove it.
Position the floor jack between 6 and 7 inches from the front pinchweld flange and lift the front of the car one side at a time. Support it on jack stands.
Place the drain pan under the drain bolt and remove the drain bolt. Once the oil has drained, install the bolt and tighten it to 18 foot-pounds. Remove the drain pan from under the car and lower your G6 to the ground.
Find the oil filter cap in the front of the engine compartment, low and just to the driver's side of center. Remove the cap with the filter wrench or socket. The filter comes out with the cap. Remove the filter from the cap.
Install the new filter on the bottom of the oil filter cap and install the cap. Tighten the cap to -- but do not exceed -- 18 foot-pounds. Pour 4.5 quarts of oil into the engine.
Position the intake manifold cover over the studs and the air cleaner outlet duct. Press down on the cover above the left-side studs to engage the retainer clips, then press on the lower-right corner of the cover to engage the air cleaner outlet duct.
Install the engine oil fill cap. Start the engine and check for leaks. Turn off the engine and wait a few minutes for the oil to drain and then check the oil level, using the dipstick. Add the remaining 1/2 quart of oil as needed to bring the oil level to the "Full" mark.
Items you will need
2 jack stands
Oil filter wrench, No. J 44887 or a 1 1/4-inch socket
Oil filter, GM part No. 12579143 or equivalent
5 quarts SAE 5W30 oil, meeting GM Standard GM6094M and displaying the API-certified starburst
Park the Grand Prix on level ground. Allow the engine to cool off. Ideally, you want the oil to be warm, as it will flow out of the engine block better than if it is cold. If the oil is too hot, however, you can be severely burned.
Go underneath the car and locate the oil drain plug at the bottom of the oil pan.
Put a drain pan underneath the drain plug.
Loosen the drain plug with a socket wrench until it's loose enough to unscrew by hand. Continue unscrewing the drain plug with your hand, but press against the oil pan while you unscrew it to prevent the oil from gushing out.
Remove the drain plug from the oil pan and allow the oil to flow into the drain pan. Wipe the oil off the drain plug with an old rag.
Remove the cap labeled "Engine Oil Only" (the oil cap) in the top of the engine compartment. This equalizes the pressure in the engine block and helps the oil to drain out. Allow the oil to drain into the drain pan until the flow is down to a steady drip.
Wipe the oil off the area around the drain hole and screw the drain plug back into place. Tighten the drain plug with a socket wrench to form a tight seal, but do not over-tighten it, as you can strip the threads and it will fall out.
Pour the old engine oil from the drain pan into an old plastic container, like an antifreeze or windshield washer fluid container.
Place the drain pan underneath the oil filter.
Remove the oil filter by unscrewing it from the engine block. If it's too tight or slippery, use a filter wrench to loosen it, then remove it by hand. Keep the open end of the filter facing up because it still contains oil.
Cover the gasket on the new oil filter with new oil by dipping your finger in the oil and running it over the gasket. This helps the new filter slide into position on the engine.
Screw the new filter onto the engine. Turn it until it's fairly tight, then add a quarter-turn.
Add the new oil to the engine by pouring it through the hole at the top of the engine block. Using a funnel can help prevent spills. Replace the oil cap after the oil has been added.
Start the Grand Prix up and let it run for a few minutes. Turn it off, then check the oil level with the dipstick. Add more oil if necessary.
Items you will need
Old plastic container
Park your Grand Prix in a level place, turn off the engine, and engage the parking brake. Place blocks behind the rear tires and disconnect the negative battery cable under the hood. Remove the oil dipstick and wipe it clean. If you have been driving your car, wait an hour before beginning your oil change to reduce the temperature of the oil and engine block.
Jack up the front of the vehicle and lower it onto jack stands. Place the jack stands under a stable spot on the frame to avoid damage to the undercarriage and to be certain that it will not fall. If you are working on a newer model Grand Prix, it has a sub frame as opposed to a full frame. Check your owners manual for the correct areas to place the jack and jack stands.
Under the car, locate the the oil pan and oil plug. The oil pan is the lowest point on the engine, and the plug is a bolt in bottom of the pan. Place the oil catch pan below the oil plug and remove the oil plug with a properly sized wrench or socket. The oil will drain into the catch pan.
Replace the oil plug and wipe the area clean with a rag so that you can locate any leaks that may arise later.
Place the catch pan below the oil filter. The oil filter will be higher up on the engine, but accessed from under the car. Using an oil filter tool or strap wrench, loosen and remove the oil filter, allowing any excess oil to fall into the drain pan. Wipe the mating surface clean on the engine block and remove any oil filter gasket material that has stuck.
Fill the replacement filter and lubricate its rubber seal with new oil. Screw the filter into place until it makes contact with the engine, and then tighten it, by hand, as instructed on the side of the filter or its retail box -- usually 1/4 to 3/4 turn. Tightening too much may cause the oil seal to split or make it very difficult to remove at the next oil change. Use caution not to cross-thread the filter on the engine block.
While it is better to have oil in the oil filter when you first start your car, some engines do not have the oil filter oriented vertically, in which cases the new oil will pour out when reinstalling. In that case, only lubricate the rubber seal and do not fill the filter with oil.
Double check that you have reinstalled both the oil plug and the oil filter.
Locate the oil fill cap on the engine and remove it. Pour the required amount of new oil into the engine using a funnel to reduce the chance of spilling. Reference your owners manual for the correct type and amount of oil. Place the dipstick back in its place and check the oil level, filling as needed until it is between the marks on the end of the stick.
Remove the jack stands and lower the vehicle back to the ground. Pour the old oil into a sealed container for proper disposal.
Start the Grand Prix and allow it to run for a minute, then turn it off again and wait two minutes for the oil to drain back into the oil pan. Check the oil level once more and add as needed to bring the level to the "Full" mark. Check below the car for any leaks near the oil drain plug or oil filter.
Items you will need
Oil catch pan with a capacity of 6 qts. or more
Socket set with ratchet
Oil filter tool or strap wrench
Two jack stands
Motor oil (specified by your owners manual)