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GMC Yukon 2000–2006

GMC YukonModel years 2000–2006

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1 conditions added

The vehicle (where a record says)

A record is under an engine, a drive or a series only where it says so: the characters of the vehicle identification number filed with a complaint, its text, or what its document says it applies to. A record that does not say is kept as "not stated". The filed numbers and the documents do not tell 4WD from AWD.

Common on this vehicle:Warning lightNoiseLoss of engine power, no accelerationMisfire or rough idleLeakGauge or instrument faultStalls or shuts offDoes not start

Possible causes

Engine366 records
Instruments and lighting
Engine
Exhaust and emissions
Transmission and driveline
Electrical, wiring and power
Suspension, wheels and tires
18Instrument panel cluster gauges stick, flutter or stop working1Speedometer needle appears inaccurate (specification +/- 2 MPH)5Castech cylinder head porosity crack (gradual coolant loss)4.8L, 5.3L only5Single-cylinder misfire (P0300-P0308) and/or chirp, squeak or tick at camshaft speed: worn cam lobe / lifter, valve or valve spring4Cylinder: design or manufacturing4Engine Block3Increased accelerator pedal effort / throttle body sticks (clean and adjust, do not replace)4.8L, 5.3L, 6.0L only5P0420 / P0430 on a new or just-replaced catalytic converter (break-in not completed)2Exhaust pop or ping noise (replace the heat shield, not the exhaust system)2Oxygen Sensor: failed2Transmission: clogged or contaminated, failed1Reverse Input Piston Seal: broken1Reduced Engine Power from throttle body connector crimp, broken wire or grounds1Stop Lamp Circuit: electrical fault1Wiring: electrical fault1Control Arm: failed1Hub Assembly: failed1Tire: failed
10 causes not drawn
Causes with no correction stated (19)

Causes the records name for which no check or repair is stated, in a technical document or in a record. Press one for the records that name it.

Exhaust and emissions
Exhaust Manifold Bolt: broken (8)Evap Vent Valve: clogged or contaminated (1)Secondary Air Injection Valve: corroded (1)
Other
Bolt: broken (2)
Fuel system
Fuel Injector: clogged or contaminated, corroded (2)Fuel Tank Cap: loose or misadjusted (1)
Electrical, wiring and power
TAC Module: electrical fault, failed (2)Body Control Module: failed (1)Junction Box: failed (1)Starter: failed (1)
Instruments and lighting
Ambient Light Sensor: loose or misadjusted (1)Daytime Running Light Bulb: failed (1)Headlight: loose or misadjusted (1)
Heating and air conditioning
Blower Motor: failed (1)Blower Motor Control Module: failed (1)
Transmission and driveline
Needle Bearing: failed (1)Rear Axle: failed (1)Transmission Seal: failed (1)
Cooling
Radiator Seal: failed (1)

The documents say what to doOnly records name itThe size of a node, the width of a link and the numbers are records matching this search, not likelihoods.

FaultCrate・GMC Yukon 2000–2006・Engine

Candidate cause (the documents say what to do)

Castech cylinder head porosity crack (gradual coolant loss)

Applies to: 4.8L, 5.3L only

Some vehicles may lose coolant gradually over time.

A very low percentage of cylinder heads with an embossed Castech logo may develop a porosity crack in a very specific area.

What to do

  1. Inspect the cylinder head to determine whether the casting was made by Castech.
  2. On a Castech casting, inspect around the five oil drain holes for witness marks of coolant seepage.
  3. The crack can be at any of the five cylinder head oil drains and shows as a clean or shiny area on an otherwise stained surface.
  4. Pressurizing the cooling system may reveal coolant, air, or both weeping in that area.
  5. Check whether the head is a Castech casting by looking for the casting logo on top of the intake port, under the rocker arm support rail and in the spring deck cavity portion of the cylinder head.
  6. If coolant witness marks are found, replace the entire cylinder head assembly.

Caution: If the heads are not Castech castings, follow normal diagnostic procedures to find the cause of the coolant loss.

What is needed

Parts and materials
  • The entire cylinder head assembly (if coolant witness marks are found)
Labor time
Not stated
Special tools
Not stated
Scan tool
Not stated

Only what the technical documents state. "Not stated" does not mean not needed.

In the records

  • Engine: replaced 1（result not stated: 1）
  • Oil Pump: replaced 1（says it came back: 1）
  • Slug: cleaned 1（says it came back: 1）
See the evidence (2 technical documents, 5 records)

Passages of the technical documents

  • The bulletin covers 2001-2006 GMC Envoy, Jimmy, Sierra and Yukon models.

    2001-2006 GMC Envoy, Jimmy, Sierra, Yukon Models

    General Motors (published by NHTSA) 2024-03-14

  • It applies to the 4.8L, 5.3L or 5.7L Vortec Gen III / Gen IV V8.

    with 4.8L, 5.3L, or 5.7L VORTEC® GEN III, GEN IV V8 Engine

    General Motors (published by NHTSA) 2024-03-14

  • Some vehicles may lose coolant gradually over time.

    Some vehicles may experience a gradual coolant loss over time.

    General Motors (published by NHTSA) 2024-03-14

  • A very low percentage of cylinder heads with an embossed Castech logo may develop a porosity crack in a very specific area.

    A very low percentage of cylinder head(s) manufactured with an embossed Castech logo may develop a porosity crack in a very specific area.

    General Motors (published by NHTSA) 2024-03-14

Read every statement and its source →

Manufacturer’s documents

A cause or a result a complaint states is the owner’s view or what a dealer told them, not an established fact.

Put together by FaultCrate from public records and technical documents. The cause and the repair are for the workshop to decide with the vehicle in front of it. Counts are records, not failure rates.