Manufacturer communication — 2006 GMC YUKON DENALI XL

Fitment confirmedReporter type: ManufacturerENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR

Relation to the target vehicle

The source's vehicle field includes the trim.

Model year: Match 2006 — Source vehicle field
Model: Match YUKON DENALI XL — Source vehicle field
Trim: Match Denali — Source vehicle field

What the manufacturer’s document says

PIP5232A ・ fault and correction ・ for GM vehicles in general

Applies to

Applies to 2015 and prior GM cars and gasoline-powered light duty and HD trucks.
the passage
2015 and Prior GM Cars and Gasoline-Powered MST Light Duty and HD Trucks

Fault

The catalytic converter has come apart or has set P0420 and/or P0430.
the passage
Technicians may encounter a concern where the catalytic converter that has come apart or has set a P0420 and/or P0430.

Finding the cause

Steps to confirm (in the document’s order)

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.
the passage
If you believe the catalytic converter has failed and with no apparent reason, it is recommended to inspect for a poor crimp at circuit terminal on the engine bank with the concern.
The grounds in question are those for the ignition system, fuel injector or the ECM.
the passage
These grounds are for the ignition system, fuel injector or the ECM.
Inspect the ground for corrosion or damage at the ground terminal ring, fasteners and grounding surfaces.
the passage
Technicians should inspect the ground for possible corrosion or damage at ground terminal ring, fasteners and grounding surfaces.

Correction

Repair

If no corrosion or damage is found, tighten the ground bolt to the proper torque.
the passage
If no corrosion or damage is found, tighten the ground bolt to the proper torque

Compiled by reading the full text of the document; each point stands on the passage shown. Check the document itself, linked below, before working on a vehicle.

Stated content

Communication summary
本予備情報通知は、触媒コンバータの早期不良が発生しているガソリン車、中型トラック、軽量トラック、および重量トラックの技術者に対する情報です。不良のあるバンクのエンジンブロックのグラウンド用リング端子のかしめ不良を点検し、ワイヤーハーネスを修理することをお勧めします。 Machine translation (unreviewed)
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.
Go to this passage in the original

Source

Source: NHTSA Manufacturer Communications
Source reference: 10135342
Received by source: 2018-05-07
Incident date: Unknown

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