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2021 GMC Sierra 3500 HD 2021 SLE Cab & Chassis

Repair services & inexpensive new parts for 2021 GMC Sierra 3500 HD 2021 SLE Cab & Chassis with 6.6L 6599CC 403Cu. In. V8 DIESEL OHV Turbocharged engine.

The 2021 GMC Sierra 3500 HD SLE Cab & Chassis is a robust and capable heavy-duty truck designed for both work and utility. Equipped with a powerful 6.6L V8 diesel engine that features turbocharging, this vehicle provides impressive towing capacity and performance. The rear-wheel drive configuration enhances its ability to handle heavy loads, making it an ideal choice for those requiring a durable and reliable truck for commercial or personal use.

Common Issues

Some common issues reported by owners include:

  • Transmission shifting problems
  • Electrical system glitches
  • Excessive diesel exhaust fluid consumption

Maintenance Tips

To keep your GMC Sierra 3500 HD running smoothly, consider the following maintenance tips:

  • Regularly change the engine oil and filter
  • Inspect and replace air filters as needed
  • Monitor tire pressure and tread wear
  • Check the brake system periodically

Typical Repair/Owning Cost Ranges

The average annual maintenance costs for a GMC Sierra 3500 HD can range from $500 to $1,200, depending on the frequency of service and any repairs needed. Major repair costs, like transmission or engine issues, can vary significantly, often ranging from $1,500 to $5,000.

Buying Advice

When inspecting a used GMC Sierra 3500 HD, consider the following:

  • Check for service records and any recalls
  • Examine the condition of the undercarriage and frame
  • Test the functionality of the transmission and brakes
  • Assess the engine for any unusual noises or leaks

FAQ

  • What is the fuel economy of the 2021 GMC Sierra 3500 HD? The fuel economy is typically around 15-20 MPG, depending on driving conditions and load.
  • How much towing capacity does the GMC Sierra 3500 HD have? The towing capacity can range from 14,500 to over 35,000 pounds, depending on the configuration.
  • What type of oil should I use in the 2021 GMC Sierra 3500 HD? It is recommended to use a high-quality 15W-40 diesel engine oil.
  • Are there any specific recalls for the 2021 GMC Sierra 3500 HD? Check the official GMC website for the latest recall information.
  • How often should I change the diesel fuel filter? It is advisable to change the diesel fuel filter every 15,000 miles or as needed.
  • Is the 2021 GMC Sierra 3500 HD good for off-road use? While primarily designed for towing and hauling, it can handle light off-road conditions with the right package.
  • What is the warranty coverage for the 2021 GMC Sierra 3500 HD? The standard warranty includes a 3-year/36,000-mile basic warranty and a 5-year/60,000-mile powertrain warranty.
  • What should I look for during a test drive? Listen for any unusual sounds, check the responsiveness of the steering, and ensure all electrical features operate correctly.

Have Questions about GMC Sierra 3500 HD 2021 SLE? Ask the assistant for questions about mileage, performance, repairs, parts, recommended maintenance and more.


Make: GMC
Model: Sierra 3500 HD
Trim: SLE Cab & Chassis 2-Door
Year: 2021

Quick Info

Fuel: DIESEL
Aspiration: Turbocharged
Engine Displacement: 6.6L
Engine CC: 6599
Engine CID: 403
Engine Block Type: V
Cylinder Type: OHV
Cylinders: 8
Drive: RWD
Body Type: Cab & Chassis
Doors: 2

Repair services & inexpensive new parts for 2021 GMC Sierra 3500 HD 2021 SLE Cab & Chassis with 6.6L 6599CC 403Cu. In. V8 DIESEL OHV Turbocharged engine.