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1978 GMC C35 1978 High Sierra Standard Cab Pickup

Repair services & inexpensive new parts for 1978 GMC C35 1978 High Sierra Standard Cab Pickup with 6.6L 400Cu. In. V8 GAS OHV Naturally Aspirated engine.

The 1978 GMC C35 High Sierra Standard Cab Pickup is a classic truck known for its robust build and powerful 6.6L 400 cubic-inch V8 engine. This rear-wheel-drive vehicle is designed for durability and performance, with a naturally aspirated overhead valve (OHV) engine configuration that delivers solid power output. As part of the larger GM truck family, the C35 is favored for its utility and classic styling, appealing to both vintage truck enthusiasts and those needing a reliable workhorse.

Common Issues

  • Oil leaks from valve cover gaskets and rear main seals.
  • Cooling system failures, often due to radiator or hose issues.
  • Brake system wear and tear, particularly with older drum brakes.
  • Carburetor-related problems, including stalling and poor fuel economy.

Maintenance Tips

  • Regularly check and replace oil and oil filter every 3,000 miles.
  • Inspect and service the cooling system annually to prevent overheating.
  • Keep the carburetor clean and properly adjusted for optimal performance.
  • Monitor brake pads and drums, replacing them as necessary to ensure safety.
  • Check suspension components, such as bushings and shock absorbers, for wear.

Typical Repair/Ownership Cost Ranges

  • Oil Change: $40 - $70
  • Brake System Overhaul: $250 - $600
  • Radiator Replacement: $300 - $500
  • Carburetor Repair/Replacement: $150 - $450
  • Suspension Work: $200 - $800

Buying Advice (What to Inspect)

  • Check for rust on the body and frame, especially in the wheel wells and undercarriage.
  • Ensure the engine runs smoothly without excessive smoke or noise.
  • Test the transmission for smooth gear shifts and no slipping.
  • Inspect the brake system for responsiveness and wear.
  • Examine the interior for wear and tear, particularly the seats and dashboard.

FAQ

How many miles per gallon does the 1978 GMC C35 typically achieve? The 1978 GMC C35 typically achieves around 10-13 miles per gallon, depending on driving conditions and maintenance.

What type of oil is recommended for this truck? SAE 10W-30 or SAE 10W-40 motor oil is recommended, especially in moderate climates.

Is the 1978 GMC C35 a reliable daily driver? While reliable, the C35 is better suited as a weekend driver or for specific tasks due to its age and fuel economy.

Can I convert the C35's drum brakes to disc brakes? Yes, conversion kits are available for upgrading from drum to disc brakes, enhancing stopping power and reliability.

What is the towing capacity of the 1978 GMC C35? The towing capacity is approximately 10,000 pounds, depending on the specific configuration and condition of the truck.

Have Questions about GMC C35 1978 High Sierra? Ask the assistant for questions about mileage, performance, repairs, parts, recommended maintenance and more.


Make: GMC
Model: C35
Trim: High Sierra Standard Cab Pickup 2-Door
Year: 1978

Quick Info

Fuel: GAS
Aspiration: Naturally Aspirated
Engine Displacement: 6.6L
Engine CC: N/A
Engine CID: 400
Engine Block Type: V
Cylinder Type: OHV
Cylinders: 8
Drive: RWD
Body Type: Standard Cab Pickup
Doors: 2

Repair services & inexpensive new parts for 1978 GMC C35 1978 High Sierra Standard Cab Pickup with 6.6L 400Cu. In. V8 GAS OHV Naturally Aspirated engine.