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    2003 GMC Truck Sonoma 4WD 4.3L SFI OHV 6cyl

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    Ignition Control Module

    Replacement Parts

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    Recommended For Your 2003  GMC Truck  Sonoma 4WD

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    • Part Number: DR178
    • Warranty: Limited Lifetime
    • Notes: It is best to test your old parts first. A Wells Test Sheet bulletin is available for this ignition module. Test sheets work with testers only. See attached bulletin to identify your tester. A misfire condition can destroy the ignition module. If the engine is or has been misfiring, do not install the new ignition module until after the source of the misfire has been corrected. Check the secondary ignition circuit; Plugs, Plug Wires, Coil (s), Distributor Cap Rotor. Also check for any camshaft position sensor trouble codes.
    • Part Number: DR178VC
    • Warranty: 1 YR
    • Notes: Test sheets work with GenIII testers only. See attached bulletin to identify your tester. It is best to test your old parts first. Wells Test sheets are available for most ignition modules. A misfire condition can destroy the ignition module. If the engine is or has been misfiring, do not install the new ignition module until after the source of the misfire has been corrected. Check the secondary ignition circuit; Plugs, Plug Wires, Coil (s), Distributor Cap Rotor. Also check for any camshaft position sensor trouble codes.

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