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
- Inspect the O-ring seal and replace it as necessary.
- The O-ring for C/K trucks is part number 12563963.
What is needed
- Parts and materials
- O-ring seal (inspected; replaced as necessary)
- O-ring 12563963 (for C/K trucks)
Part numbers printed in the document
12563963Seal, Oil Pump (O Ring)Look up at RockAuto (aftermarket candidates) ↗Search the web ↗
Replaced by: 12584922as stated by GMPartsGiant (checked 2026-10-06) ↗Look up at RockAuto (aftermarket candidates) ↗Search the web ↗
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.
- 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.
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)
| Document | Publisher | Date |
|---|---|---|
| [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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