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1979 GMC C1500 1979 Sierra Grande Standard Cab Pickup

Repair services & inexpensive new parts for 1979 GMC C1500 1979 Sierra Grande Standard Cab Pickup with 4.8L 292Cu. In. l6 GAS OHV Naturally Aspirated engine.

The 1979 GMC C1500 Sierra Grande Standard Cab Pickup is a classic American truck known for its sturdy build and versatility. Powered by a 4.8L 292 cubic inch inline-six gas engine, it offers a reliable performance suitable for both work and leisure. This rear-wheel-drive (RWD) vehicle provides a comfortable cabin with a simple yet functional design, making it a favored choice among classic car enthusiasts and those seeking a dependable pickup for various tasks.

Common Issues

Owners of the 1979 GMC C1500 may encounter several common issues, including:

  • Rust, particularly in the frame and body panels.
  • Fuel system problems, such as clogged fuel filters or issues with the carburetor.
  • Electrical issues, especially with the aging wiring harness.
  • Transmission problems, particularly with automatic models.

Maintenance Tips

To keep your GMC C1500 in good condition, consider the following maintenance tips:

  • Regularly check and change engine oil and filters.
  • Inspect and maintain the cooling system to prevent overheating.
  • Keep an eye on brake performance and replace pads as necessary.
  • Inspect the suspension components for wear and replace as needed.

Typical Repair/Owership Cost Ranges

The costs associated with owning and repairing a 1979 GMC C1500 can vary:

  • Basic maintenance costs: $300 - $600 annually.
  • Minor repairs (brakes, tires): $150 - $500.
  • Major repairs (engine or transmission): $1,500 - $3,500.

Buying Advice (What to Inspect)

If you're considering purchasing a 1979 GMC C1500, be sure to inspect the following:

  • Check for rust, especially undercarriage and wheel wells.
  • Examine the engine for leaks and overall condition.
  • Test drive the vehicle to assess transmission performance.
  • Inspect the interior and exterior for signs of neglect or damage.

Frequently Asked Questions

  • What is the fuel economy of the 1979 GMC C1500? The fuel economy typically ranges from 12 to 15 miles per gallon.
  • Are parts readily available for this vehicle? Yes, many parts are available through classic car suppliers and online retailers.
  • What type of oil should I use for this engine? SAE 30 or 10W-30 oil is generally recommended for the 292 engine.
  • How often should I change the oil? It's advisable to change the oil every 3,000 to 5,000 miles.
  • Is this truck suitable for modern driving conditions? Yes, but it may require some upgrades for safety and comfort.
  • What is the towing capacity of the 1979 GMC C1500? The towing capacity can range from 5,000 to 8,000 pounds depending on configuration.
  • How do I improve performance on an older engine? Consider tuning the engine, upgrading the carburetor, or improving the exhaust system.
  • What should I do if the truck overheats? Check coolant levels, the radiator, and the thermostat for issues.

Have Questions about GMC C1500 1979 Sierra Grande? Ask the assistant for questions about mileage, performance, repairs, parts, recommended maintenance and more.


Make: GMC
Model: C1500
Trim: Sierra Grande Standard Cab Pickup 2-Door
Year: 1979

Quick Info

Fuel: GAS
Aspiration: Naturally Aspirated
Engine Displacement: 4.8L
Engine CC: N/A
Engine CID: 292
Engine Block Type: L
Cylinder Type: OHV
Cylinders: 6
Drive: RWD
Body Type: Standard Cab Pickup
Doors: 2

Repair services & inexpensive new parts for 1979 GMC C1500 1979 Sierra Grande Standard Cab Pickup with 4.8L 292Cu. In. l6 GAS OHV Naturally Aspirated engine.