GM Engine Wiring Harness Junction Block

Genuine GM · Part #19210439 · Electrical / Wiring

Genuine GM engine-compartment wiring harness junction block (requires programming/special setup).

Fitment note: The parts-catalog fitment shown above is confirmed, but the exact model years aren’t stated on the source listing. Confirm this part fits your specific vehicle with AutoNation Parts before ordering.

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Before you order

• Confirm it fits with your VIN before buying.
• The numbers under “Replaces” are older, superseded numbers — why GM part numbers change.

Details on this page were taken from the live AutoNation Parts listing (https://www.autonationparts.com/parts/gm-engine-wiring-harness-junction-block-19210439) on 2026-07-13. Prices and availability can change — confirm on the retailer’s page before purchase.