Workshop Repair and Service Manuals GMC SIERRA

When to Add Engine Oil


If the oil is below the cross-hatched area at the tip of the dipstick, add 1 L (1 qt) of the recommended oil and then recheck the level. See “Selecting the Right Engine Oil” in this section for an explanation of what kind of oil to use. For engine oil crankcase capacity, see Capacities and Specifications on page 12?2.

Notice: Do not add too much oil.

Oil levels above or below the acceptable operating range shown on the dipstick are harmful to the engine. If you find that you have an oil level above the operating range, i.e., the engine has so much oil that the oil level gets above the cross-hatched area that shows the proper operating range, the engine could be damaged. You should drain out the excess oil or limit driving of the vehicle and seek a service professional to remove the excess amount of oil.

See Engine Compartment Overview on page 10?6 for the location of the engine oil fill cap.

Add enough oil to put the level somewhere in the proper operating range. Push the dipstick all the way back in when through.

What to Use     Refer to Recommended Fluids and Lubricants on page 11?12 to determine what kind of lubricant to use.
How to Inspect the Engine Air Cleaner/Filter     To inspect the air cleaner/filter, remove the engine air cleaner/filter from the vehicle by following Steps 1 through 6. When the engine air cleaner/filter is removed, lightly shake it to release loose dust and dirt. If the...
Consistency of Readings     Always check the fluid level at least twice using the procedure described previously. Consistency (repeatable readings) is important to maintaining proper fluid level. If readings are still inconsistent, contact the dealer.
Brake Fluid     The brake master cylinder reservoir is filled with DOT 3 brake fluid. See Engine Compartment Overview on page 10?6 for the location of the reservoir. There are only two reasons why the brake fluid level in the...
Checking Coolant     The coolant surge tank is located in the engine compartment on the passenger side of the vehicle. See Engine Compartment Overview on page 10?6 for more information on location. The vehicle must be on a level surface when...