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GMC Yukon 2000–2006

GMC YukonModel years 2000–2006

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Common on this vehicle:

causeGround Ring TerminalRemove

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3 records state a cause or a remedy. Each record is shown as short labels in the order fault → finding the cause → correction. Press a label to narrow to the records that state it.

Component named as the cause

Work done

A ribbon is as wide as the records that state both of its ends (only the commonest are drawn). A record that names several symptoms or components runs through each. Orange is records that say the fault came back or was not fixed. Results come from owners’ reports only; one that does not say is “result not stated”. None of this is a likelihood of a cause or a rate at which work succeeds.

Read the records one by one (1)

ENGINE AND ENGINE COOLING1

  1. Manufacturer communication2000–2006 GMC YUKON DENALI ・ 2018-05-07(2 earlier editions of this document folded here)

    Premature Catalytic Converter Failures – Preliminary Information

    1. 1Fault

      • The catalytic converter has come apart or has set P0420 and/or P0430.

    2. 2Finding the cause

      Steps to confirm (in the document’s order)

      1. If the converter has failed with no apparent reason, inspect for a poor crimp at the circuit terminal on the engine bank with the concern.
      2. The grounds in question are those for the ignition system, fuel injector or the ECM.
      3. Inspect the ground for corrosion or damage at the ground terminal ring, fasteners and grounding surfaces.

    3. 3Correction

      Repair

      • If no corrosion or damage is found, tighten the ground bolt to the proper torque.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to 2015 and prior GM cars and gasoline-powered light duty and HD trucks.
    • Condition：The catalytic converter has come apart or has set P0420 and/or P0430.
    • Confirm：If the converter has failed with no apparent reason, inspect for a poor crimp at the circuit terminal on the engine bank with the concern.
    • Confirm：The grounds in question are those for the ignition system, fuel injector or the ECM.
    • Confirm：Inspect the ground for corrosion or damage at the ground terminal ring, fasteners and grounding surfaces.
    • Repair：If no corrosion or damage is found, tighten the ground bolt to the proper torque.

    Open the manufacturer’s document (PDF) ↗ The points above were read from this document.

    Remedy
    This Preliminary Information communication provides information to the technician about gasoline powered cars, mid-size trucks, light duty trucks, and heavy duty trucks with premature catalytic converter failures. It is recommended to inspect for a poor crimp on the grounds ring terminal at the engine block for the bank with the concern and repair the wire.

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