| |

1978 GMC K25 1978 Sierra Grande Cab & Chassis

Repair services & inexpensive new parts for 1978 GMC K25 1978 Sierra Grande Cab & Chassis with 4.8L 292Cu. In. l6 GAS OHV Naturally Aspirated engine.

The 1978 GMC K25 Sierra Grande Cab & Chassis is a robust 4WD truck that features a 4.8L (292 CID) inline-six engine. Known for its durable construction and straightforward design, this vehicle is often favored for both utility and restoration projects. While it boasts solid performance and reliability, potential owners should be aware of common issues and maintenance needs associated with vehicles of this vintage.

Common Issues

  • Rust on the body and frame, especially in the wheel wells and undercarriage
  • Leaking engine oil seals
  • Worn suspension components leading to a rough ride
  • Electrical system issues, particularly with older wiring

Maintenance Tips

  • Regularly check and change the engine oil to preserve engine life.
  • Inspect brake components and replace them as necessary.
  • Keep an eye on the coolant system and check for leaks.
  • Lubricate the chassis and suspension components to prevent wear.

Typical Repair/Owning Cost Ranges

  • Basic maintenance (oil changes, filters): $100-$200 annually
  • Brake system repairs: $300-$800 depending on parts and labor
  • Suspension repairs: $200-$1,000 depending on the extent of wear
  • Bodywork for rust repairs: $500-$3,000 depending on severity

Buying Advice (What to Inspect)

  • Check for signs of rust on the body and frame.
  • Inspect the engine for leaks and listen for unusual noises.
  • Review the condition of the suspension and brakes.
  • Test all electrical components, including lights and gauges.

FAQ

  • What kind of fuel does the 1978 GMC K25 use? It uses gasoline.
  • What is the towing capacity of the GMC K25? It typically has a towing capacity of around 5,000 to 7,000 lbs, depending on configuration.
  • Are parts readily available for this model? Many parts are available through classic auto parts suppliers and online marketplaces.
  • How often should I change the oil? It is recommended to change the oil every 3,000 to 5,000 miles, depending on usage.
  • What performance upgrades are available? Common upgrades include improved exhaust systems and carburetor tuning.
  • Is the 1978 GMC K25 a good vehicle for restoration? Yes, its simple mechanics and availability of parts make it a good candidate for restoration.
  • What is the average fuel economy for this truck? The average fuel economy is around 10-15 miles per gallon.
  • How do I maintain the 4WD system? Regularly check the transfer case fluid and ensure the locking hubs function properly.

Have Questions about GMC K25 1978 Sierra Grande? Ask the assistant for questions about mileage, performance, repairs, parts, recommended maintenance and more.


Make: GMC
Model: K25
Trim: Sierra Grande Cab & Chassis 2-Door
Year: 1978

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: 4WD
Body Type: Cab & Chassis
Doors: 2

Repair services & inexpensive new parts for 1978 GMC K25 1978 Sierra Grande Cab & Chassis with 4.8L 292Cu. In. l6 GAS OHV Naturally Aspirated engine.