2003 GMC W-Series Ignition Relays, Sensors & Switches
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- PerTronix®4-Pin Wire Harness and CapacitorGMC W-Series 2003, 4-Pin Wire Harness and Capacitor by PerTronix®. From replacement wiring harness to adjustable vacuum advance canisters, lockout kits and mechanical advance kits, they have the parts to get your HEI distributor back...Digital performance solutions give you more power and more features in a smaller packageInnovative technology for superior operation and rugged dependability under harsh conditions$30.95