got this from my on line help software haven't confirmed it yet but hope it helps you I noticed its really hard to get help on here:mad2: also got the tsb bulletin you might want to check into
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Vehicle » Powertrain Management » Emission Control Systems » Positive Crankcase Ventilation Valve » Technical Service Bulletins » All Technical Service Bulletins » Engine - Greater Than Normal Oil Consumption Notes
Engine - Greater Than Normal Oil Consumption
File In Section: 06 - Engine/Propulsion System
Bulletin No.: 01-06-01-029B
Date: July, 2002
Higher than Expected Engine Oil Consumption
(Replace PCV Valve)
2002 Chevrolet Avalanche
1999-2002 Chevrolet Silverado, Suburban, Tahoe Models
2002 Cadillac Escalade, Escalade EXT
1999-2002 GMC Denali, Sierra, Suburban, Yukon Models
with 4.8L, 5.3L or 6.0L Engine (VINS V, T, N, U - RPOs LR4, LM7, LQ9, L04)
This bulletin is being revised to clarify the parts information. Please discard Corporate Bulletin Number 01-06-01-029A (Section 06 - Engine/Propulsion System).
Some customers may comment on higher than expected engine oil consumption. They may further comment on consumption in the range of 3,200 km (2,000 mi) or less per quart (0.946 liter) of oil under normal driving conditions.
The condition may be due to the positive crankcase ventilation (PCV) valve flow rate under certain engine operating conditions.
1. Verify that the oil consumption is not the result of an oil leak or other engine concern.
2. The dealer should perform an oil consumption test. The vehicle should have accumulated over 6,450 km (4,000 mi) before establishing the oil consumption rate. Reference Corporate Bulletin Number 01-06-01-011, Information on Engine Oil Consumption Guideline, for details.
3. Remove the PCV valve and inspect the hose going to the intake manifold for signs of excessive oil being present.
4. If excessive oil is present in the PCV hose, replace the PCV valve (Type 948C) (2) with a new-style fixed orifice PCV valve, GM P/N 12572717 (1). See the illustration shown.
Important: The new style fixed orifice PCV valve contains no moving parts, and does not rattle when shaken.
If the vehicle has an orifice style PCV valve, investigate other causes for high oil consumption.
Parts are currently available from GMSPO.
For vehicles repaired under warranty, use the table shown.
The PCV valve on a 2002 Escalade 6.0 engine is located at the rear drivers side. Remove the top engine cover and the left side (driver side) plastic engine cover. The hose for the PCV valve is in the rear. Follow the hose and pull out the valve. Took me a while to find it, but easy replacement when you know where to look