<p>Includes: - Harmonic Balancer</p> <p>Fits Models: - GMC C25</p> <p>Model Years: - 1977–1978</p> <p>Submodels: - C25, K25, Body styles: Pickup Truck</p> <p>Engine Options: - Common engine sizes include 5.0L V8 (350 CID), 5.7L V8 (350 CID), and 6.6L V8 (400 CID)</p> <p>Description: This harmonic balancer is designed specifically for the GMC C25 models from 1977 to 1978. It plays a crucial role in reducing engine vibrations and maintaining smooth operation.</p> <p>Features: - Direct fit for 1977-1978 GMC C25 - Reduces engine vibrations for improved performance - Durable construction for long-lasting use - Easy installation with factory specifications - Compatible with standard engine options</p> <p>Part Numbers: - 26966RHSX</p>