Ignition Control Module for GMC Buick Chevrolet Chevy Isuzu Cadillac Compatible with LX381 DM579 DR178 1885-1000 6H1051 10482803 Improves Overall Performance Brand New in Original Box Low Price Guaranteed PREMIUM MATERIAL Reduce heat stress failure Increase voltage Dissipate heat Maintain engine power Durable and long lasting Tested with automated computers Laser trimmed design Enhanced RPM performance Exact spark timing