GM Genuine Parts 4.3L 6-Cylinder Engine Assembly, Remanufactured
OE
Pack of 1

GM Genuine Parts 4.3L 6-Cylinder Engine Assembly, Remanufactured

GM Part #12491865

MSRP$4,860.67*
Refundable Core Charge:
+$200.00

GM Genuine Parts Engine Long Blocks are designed, engineered, and tested to rigorous standards, and are backed by General Motors.

  • Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
  • GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
  • GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle

Pack of 1

About this product

GM Genuine Parts Engine Long Blocks are designed, engineered, and tested to rigorous standards, and are backed by General Motors. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).

Warning WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov Product contains Perfluorooctanoic acid (PFOA): Not for import into European Union (EU)

  • Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
  • GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
  • GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
  • GM regularly updates production and service part designs to integrate new materials and technologies
  • GM regularly updates production and service part designs to integrate new materials and technologies

ClassificationOE
Core Charge200.00
Main Bearing Cap Bolt Quantity2
Fuel TypeGas

36 Months/100,000 Miles/160,000 Kilometers Limited Warranty for Parts (plus Labor if installed by a GM dealer)

Please visit our warranty page on Gmparts.com for full warranty details.

Good Maintenance Practices:

  • Before purchasing and installing an engine long block, make sure it is the correct size and fit for your vehicle.
  • Keep coolant levels full, but do not overfill, to help prevent overheating in the engine block.
  • Keep the oil changed and the oil level full for proper lubrication.
  • Do not pour cold water into an overheated block, as this may cause it to crack.
  • Regularly inspect engine long blocks for signs of damage or failure, and replace them if signs of damage or failure are found.

Service engine long blocks when signs of we­­ar or failure are displayed, including but not limited to:

  • Internal engine noise, including but not limited to knocking or tapping
  • Smoke from the exhaust
  • Engine misfire
  • Loss of power
  • Engine overheating
  • Excessive oil and/or coolant consumption
  • Oil in the antifreeze or antifreeze in the engine oil

Certain automotive parts can be recycled and remanufactured for future use. These parts have a "core charge" that is used as a deposit on the portion of the part that can be reused. The reason for this charge is to encourage the return of your old part. When the recyclable component from your old part is returned to us, the charge is refunded to you.

ModelBody StyleTrimYear(s)
Astro1996, 1997, 1998
Blazer1996, 1997, 1998
C15001996, 1997, 1998
Express 15001996, 1997, 1998
Express 25001996, 1997, 1998

Frequently Asked Questions

No. A component in the block like a piston ring or bearing can be repaired, but any damage to the block core itself is cause to replace the engine block.

Yes. They differ in the amount of parts they contain - the long block comes with cylinder head(s) and valve train components while the short block does not. However, their external dimensions are still the same.