Source reference 2006-01-01

Manufacturer communication — 2002 GMC YUKON

Reporter type: Manufacturer

Vehicles as recorded

2002 GMC YUKON This vehicle's overview →
2003 GMC YUKON This vehicle's overview →
2004 GMC YUKON This vehicle's overview →
2002 GMC YUKON XL This vehicle's overview →
2003 GMC YUKON XL This vehicle's overview →
2004 GMC YUKON XL This vehicle's overview →

What the manufacturer’s document says

05-06-04-029 ・ fault and correction ・ names this vehicle

Applies to

The row is for 2002-2004 Silverado, Suburban, Tahoe, Sierra, Yukon/XL and Escalade EXT with rough idle, misfire and MIL with DTC P0300.
the passage
2002-2004 Silverado, Suburban, Tahoe, Sierra, Yukon/XL, Escalade EXT – Rough Idle, Misfire, MIL DTC P0300

Fault

The condition is rough idle, misfire and MIL with DTC P0300.
the passage
Silverado, Suburban, Tahoe, Sierra, Yukon/XL, Escalade EXT – Rough Idle, Misfire, MIL DTC P0300

Finding the cause

Steps to confirm (in the document’s order)

Measure the intake manifold for warpage across two runner ports only.
the passage
Measure intake manifold for warpage across two runner ports only.

Correction

Repair

Replace the upper manifold gasket with the teal-green gasket.
the passage
Replace upper manifold gasket with teal-green gasket.
The reference given for this row is 05-06-04-029.
the passage
Don’t replace upper intake manifold gasket with orange gasket. 05-06-04-029

Caution

Do not measure the intake manifold across all four intake runner ports.
the passage
Don’t measure intake manifold across all four intake runner ports.
Do not replace the upper intake manifold gasket with an orange gasket.
the passage
Don’t replace upper intake manifold gasket with orange gasket.

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
Japanese translation not processed yet.
Truck Issues — Fix It Right the First Time (new issues in bold) 2002-2004 Silverado, Suburban, Tahoe, Sierra, Yukon/XL, Escalade EXT – Rough Idle, Misfire, MIL DTC P0300 Silverado, Suburban, Tahoe, Sierra, Yukon/XL, Escalade EXT – Rough Idle, Misfire, MIL DTC P0300 Measure intake manifold for warpage across two runner ports only. Replace upper manifold gasket with teal-green gasket. Don’t measure intake manifold across all four intake runner ports. Don’t replace upper intake manifold gasket with orange gasket. Don’t replace upper intake manifold gasket with orange gasket. 05-06-04-029
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Source

Source: GM TechLink
Source reference: 2006-01-01
Received by source: 2006-01-01
Incident date: Unknown

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