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GMC YukonModel years 2000–2006

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EngineModel years 2000–2003Manufacturer

Oil pump pickup (screen) O-ring cut: engine tick / lifter noise

4.8L, 5.3L, 5.7L or 6.0L V8 (RPOs LR4, LM7, L59, LS1, LS6, LQ9, LQ4); 2000-2003 GMC Yukon, Yukon XL

FaultCrate・Oil pump pickup (screen) O-ring cut: engine tick / lifter noise

Customers may report an engine tick that has likely been present since new and is typically noticed within the first 161-322 km (100-200 mi).

The noise may be present at cold start, appear to diminish, and then return as the engine warms to operating temperature.

The O-ring seal between the oil pump screen and the oil pump may be cut, causing aeration of the oil.

What to do

  1. Inspect the O-ring seal and replace it as necessary.
  2. The O-ring for C/K trucks is part number 12563963.

Part numbers printed in the document

The numbers are as the document prints them. The name and the replacing number are what the pages of GMPartsGiant, a reseller of genuine parts and not GM, state. Aftermarket equivalents are not checked here (the links only search by number). Confirm the fit for the vehicle (VIN) before ordering.

Caution

  • The noise may often be diagnosed as a collapsed lifter.

Applies to

  • The bulletin covers 2000-2003 GMC Yukon and Yukon XL.
  • It applies to the 4.8L, 5.3L, 5.7L or 6.0L V8 (RPOs LR4, LM7, L59, LS1, LS6, LQ9, LQ4).
See the evidence (1 documents, 8 passages)
DocumentPublisherDate
[1]02-06-01-038: Engine Knock or Lifter Noise (Replace O-Ring) ↗
ManufacturerGeneral Motors (copy hosted by Corvette Action Center)
2002-12-02

  • Applies toThe bulletin covers 2000-2003 GMC Yukon and Yukon XL.

    2000-2003 GMC Yukon, Yukon XL— [1] Model and Year

  • Applies toIt applies to the 4.8L, 5.3L, 5.7L or 6.0L V8 (RPOs LR4, LM7, L59, LS1, LS6, LQ9, LQ4).

    with 4.8L, 5.3L, 5.7L or 6.0L V8 Engine (VINs V, T, Z, G, S, N, U -- RPOs LR4, LM7, L59, LS1, LS6, LQ9, LQ4)— [1] Model and Year

  • First signsCustomers may report an engine tick that has likely been present since new and is typically noticed within the first 161-322 km (100-200 mi).

    Some customers may comment on an engine tick noise. The distinguishing characteristic of this condition is that it likely will have been present since new, and is typically noticed within the first 161-322 km (100-200 mi).— [1] Condition

  • First signsThe noise may be present at cold start, appear to diminish, and then return as the engine warms to operating temperature.

    the noise may be present at cold start and appear to diminish and then return as the engine warms to operating temperature.— [1] Condition

  • CautionThe noise may often be diagnosed as a collapsed lifter.

    The noise may often be diagnosed as a collapsed lifter.— [1] Condition

  • Why it happensThe O-ring seal between the oil pump screen and the oil pump may be cut, causing aeration of the oil.

    The O-ring seal between the oil pump screen and the oil pump may be cut, causing aeration of the oil.— [1] Cause

  • RepairInspect the O-ring seal and replace it as necessary.

    Inspect the O-ring seal and replace as necessary.— [1] Correction

  • RepairThe O-ring for C/K trucks is part number 12563963.

    12563963 Seal-O/Pmp (O-ring) (C/K Trucks)— [1] Parts Information

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.

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