2023 GMC Sierra Denali 3500 HD Engine Oil and Fluids
The 2023 GMC Sierra Denali 3500 HD has a strong and well-thought-out engine oil and fluids system that sets the bar for performance, dependability, and durability in heavy-duty trucks. At the heart of this amazing system is the powerful engine, which is usually a V8 turbo diesel or gasoline engine known for its amazing towing and pulling abilities. GMC advises using its own Dexos-certified engine oil, which is specially made to meet the tough needs of this high-output powerplant, to get the best performance and longevity. In addition, the Sierra Denali 3500 HD’s transmission fluid is a synthetic blend that is carefully made to keep shifting smoothly even when the truck is carrying a lot of weight.
Its advanced cooling system also effectively gets rid of heat so the truck doesn’t get too hot when it’s working hard. Both the differential fluid and the transfer case fluid in the truck are made to handle the stresses of driving and off-road adventures. They do this by distributing power well and keeping the drivetrain’s integrity. With a focus on lubrication, cooling, and fluid quality, the 2023 GMC Sierra Denali 3500 HD’s engine oil and fluids system is the best. This heavy-duty workhorse is ready for any task, and truck fans can rest easy knowing their truck is in good hands.
Vehicle Care
- Battery (Under Cover). See Battery North America
- Underhood Compartment Fuse Block
- (Under Cover). Underhood Compartment Fuse Block
- Coolant Surge Tank and Pressure Cap
- (Under Cover). See Cooling System . Brake Fluid Reservoir (Under Cover). See Brake Fluid 0 298.
- Windshield Washer Fluid Reservoir. See Washer Fluid .
Cooling System
It is not necessary to regularly check coolant unless a leak is suspected or an unusual noise is heard. A coolant loss could indicate a problem. Have it inspected and repaired by your dealer.
The following explains the cooling system and how to check the coolant level.
During vehicle operation and also during charging, the high-voltage battery cells in the vehicle are kept within a normal operating temperature range. If the temperature rises above this temperature, the battery cooling system turns on the air conditioning compressor and cools the coolant until the correct temperature is reached. If the temperature falls below this temperature, a high-voltage heater, located outside the battery on a cradle, heats the coolant until the correct temperature is reached.
Checking Coolant
The coolant needs to be replaced at the appropriate interval. See Maintenance Schedule
The coolant reservoir is in the underhold compartment. See Underhold Compartment Overview.
To access the coolant reservoir under the hood, the right-side access cover needs to be removed.
- Park on a level surface and turn the vehicle off.
- Open the hood. See Hood
- Turn the three bolts three-quarter turn and remove the right side access cover.
- After the system has completely cooled, check that the coolant level in the reservoir.
- If the coolant level is not visible or needs to be adjusted within the reservoir, contact your dealer.
Adding Washer Fluid
Open the cap with the washer symbol on it. Add washer fluid until the tank is full. See Underhold Compartment Overview 0 295 for the reservoir location
Caution
- Do not use washer fluid that contains any type of water-repellent coating.
- This can cause the wiper blades to chatter or skip.
- Do not use engine coolant (antifreeze) in the windshield washer. It can damage the windshield washer system and paint.
- Do not mix water with ready-to-use washer fluid. Water can cause the solution to freeze and damage the washer fluid tank and other parts of the washer system.
- Continued. Do not use washer fluid that contains any type of water-repellent coating.
- This can cause the wiper blades to chatter or skip. .
- Do not use engine coolant (antifreeze) in the windshield washer. It can damage the windshield washer system and paint.
- Do not mix water with ready-to-use washer fluid. Water can cause the solution to freeze and damage the washer fluid tank and other parts of the washer system.
Caution
- When using concentrated washer fluid, follow the manufacturer’s instructions for adding water.
- Fill the washer fluid tank only three-quarters full when it is very cold.
- This allows for fluid expansion if freezing occurs, which could damage the tank if it is completely full.
Brakes
Disc brake linings have built-in wear indicators that make a high-pitched warning sound when the brake linings are worn and new linings are needed. The sound can come and go or can be heard all the time whe the vehicle is moving, except when applying the brake pedal firmly.
Warning
The brake wear warning sound means that soon the brakes will not work well. That could lead to a crash. When the brake wear warning sound is heard, have the vehicle serviced.
Vehicle Care
Caution
Continuing to drive with worn-out brake linings could result in costly brake repairs.
Some driving conditions or climates can cause a brake squeal when the brakes are first applied, clearing up following several applications. This does not mean something is wrong with the brakes.
Properly torqued wheel nuts are necessary to help prevent brake pulsation. When tires are rotated, inspect brake linings for wear and evenly tighten wheel nuts in the proper sequence to torque specifications. See Capacities and Specifications . Brake pads should be replaced as complete axle sets.
Brake Pedal Travel
See your dealer if the brake pedal does not return to normal height, or if there is a rapid increase in pedal travel. This could be a sign that brake service may be required.
Replacing Brake System Parts Always replace brake system parts with new, approved replacement parts. If this is not done, the brakes may not work properly. The braking performance can change in many ways if the wrong brake parts are installed or if parts are improperly installed.
Brake Fluid
The brake master cylinder reservoir is filled with GM-approved DOT 4 brake fluid as indicated on the reservoir cap. See Underhold Compartment Overview for the location of the reservoir.
Checking Brake Fluid
With the vehicle in P (Park) on a level surface, the brake fluid level should be between the minimum and maximum marks on the brake fluid reservoir. There are only two reasons why the brake fluid level in the reservoir may go down:
Normal brake lining wear. When new linings are installed, the fluid level goes back up.
A fluid leak in the brake hydraulic system. Have the brake hydraulic system fixed. With a leak, the brakes will not work well.
Always clean the brake fluid reservoir cap and the area around the cap before removing it. Do not top off the brake fluid. Adding fluid does not correct a leak. If fluid is added when the linings are worn, there will be too much fluid when new brake linings are installed. Add or remove fluid, as necessary, only when work is done on the brake hydraulic system. When the brake fluid falls to a low level, the brake warning light comes on. See Brake System Warning Light Brake fluid absorbs water over time which degrades the effectiveness of the brake fluid. Replace brake fluid at the specified intervals to prevent increased stopping distance. See Maintenance Schedule
What to Add
Use only GM-approved DOT 4 brake fluid from a clean, sealed container. See Recommended Fluids and Lubricants
Warning
The wrong or contaminated brake fluid could result in damage to the brake system. This could result in the loss of braking leading to a possible injury. Always use the proper GM approved.
brake fluid.
If brake fluid is spilled on the vehicle’s painted surfaces, the paint finish can be damaged. Immediately wash off any surface.
Battery – North America
This vehicle has a high-voltage battery and a standard 12-volt battery. See your dealer if either the 12-volt or high-voltage battery needs service.
Volt Battery
The original equipment battery is maintenance-free. Do not remove the cap and do not add fluid. Do not disconnect the 12-volt battery during storage.
Refer to the replacement number shown on the original battery label when a new 12-volt battery is needed. The vehicle has an
Absorbent Glass Mat (AGM) 12-volt battery. Installation of a standard 12-volt battery will result in reduced 12-volt battery life. Some 12-volt chargers have an AGM battery setting. This setting limits the charge voltage to 14.8 volts and helps extend the battery life. If available, use the AGM setting when charging the battery.
FAQs
he 2023 GMC Sierra Denali 3500 HD usually needs full synthetic oil with a viscosity grade of 5W-30.
The oil should be changed every 7,500 to 10,000 miles, but for exact intervals, always consult your owner’s manual.
Although synthetic oil is normally preferred, you can nevertheless use regular oil if necessary. However, synthetic oil provides superior protection and performance.
This model’s oil capacity can change, although it often ranges between 10 and 12 quarts, including the oil filter.
Once the engine has been running for a minute, turn it off. Check the oil level with the dipstick after waiting a few minutes. The oil level on the dipstick should be between the “Min” and “Max” marks.
Usual antifreeze and distilled water ratios for the Sierra Denali 3500 HD are 50% and 50%, respectively. For details, check your owner’s handbook.
As directed in your manual, check your coolant level frequently and have the coolant system cleansed and updated every two to three years.
Although it can run on ordinary gasoline, this vehicle is best suited for premium fuel. Premium usage, however, can improve performance.
Depending on the particular tires and load, a different tire pressure may be advised. For the correct pressure, check the plaque on the driver’s door jamb.
Every time the oil is changed, which should be done every 7,500 to 10,000 miles.
Through the reservoir, the power steering fluid level can be monitored. It ought to fall somewhere between the “Min” and “Max” labels.
Follow the owner’s manual’s instructions and use DOT 3 or DOT 4 brake fluid. Regularly check the brake reservoir’s fluid level.
Useful Link
View Full PDF : GMC Sierra Denali 3500 HD 2023 User Guide | Auto User Guide
All-Wheel Drive (AWD): 2023 GMC Sierra Denali 3500 HD All-Wheel Drive (AWD) Guide