A 4.3L Vortec is a 4.3 liter V6 engine with a much higher air intake, giving it more power than a regular engine. This particular engine is installed in many different General Motors (GM) vehicles. The 4.3 liter Vortec V6 engine uses 5W30 engine oil in colder climates and 10W40 in warm climates. The 4.3 liter Vortec V6 engine holds four and one-half qts. of engine oil inside the oil pan. The oil pan is located on the bottom of the engine and the oil filter is located on the driver’s side of the engine right next to the oil pan. The oil filter will need to be changed as well during this process. No matter what vehicle this engine is in, the oil-changing process will be the same and take about 15 minutes to complete.

Step 1

Raise the front end of the vehicle using the jack and lower the front end of the vehicle onto the two jack stands. Slide under the engine so that you are looking up at the bottom of the engine. Position the oil drain pan under the drain plug on the underside of the oil pan.