2003 Wiring Harness Adapters and Extensions

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Summit Racing™ GM Throttle Body Wiring Harness Adapters SUM-890106

Throttle Body Adapter Harness, LS2 Throttle Body to LS1 Vehicle, Each

Part Number: SUM-890106

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Throttle Body Adapter Harness, LS2 Throttle Body to LS1 Vehicle, Each

Part Number: CEI-108115

4.1 out of 5 stars ( 10 )

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Throttle Body Adapter Harness, 8-Pin LS1 Harness to 6-Pin LS2 Throttle Body Plug, Each

Part Number: TSN-81032

4.5 out of 5 stars ( 4 )

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LS Gen 3 Throttle Body Wire Extension DBW 8 Wire Vortec 4.8 5.3 6.0 LQ4 LQ9 LM7

Part Number: ICB-WETHB30-12

5.0 out of 5 stars ( 1 )

Estimated Ship Date: May 15, 2026 if ordered today

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Estimated Ship Date: May 15, 2026 if ordered today