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2003 chevy suburban running rough in cold weather

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Special Coverage Adjustment – Instrument Panel Cluster Gauge Needle Function

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2003-2004 CADILLAC ESCALADE, ESCALADE ESV, ESCALADE EXT 2005 CADILLAC ESCALADE, ESCALADE ESV, ESCALADE EXT (U.S. ONLY) 2003-2004 CHEVROLET AVALANCHE, SILVERADO, SUBURBAN, TAHOE 2005 CHEVROLET AVALANCHE, SILVERADO, SUBURBAN, TAHOE (U.S.ONLY) 2003-2004 GMC SIERRA, YUKON, YUKON XL 2005 GMC SIERRA, YUKON, YUKON XL (U.S. ONLY) . Install the IPC. Ensure everything is connected properly. The replacement IPC requires SPS Programming and IPC Setup procedures to be performed. It does not matter which procedure is performed first. 2. Start the engine and then select IPC Setup. You must have the engine running before performing the IPC Setup. 3. Select IPC Setup. With the engine running, enter the appropriate mileage and engine hours. 4. Select “OK”. Review the pop up asking you to verify the mileage and engine hours. Move the pop up out of the way if necessary to view the verification screen. This may require a click and drag of the dialog box. 5. Verify that the mileage and engine hours are correct and select “OK”. DO NOT turn the ignition OFF until the engine has “run” for approximately seven (7) minutes. Allowing the engine to idle for this period of time allows the IPC to accumulate 1/10th of an hour and write the correct engine hour value to the permanent memory. The engine must be running before set up is performed and run for approximately seven minutes after the user selects “OK” confirming their mileage/engine hour inputs. After approximately seven minutes, shut the engine OFF and complete the event. The seven minute clock starts after you select “OK”, confirming the entries. Note: Based on feedback from technicians, we are currently making changes to the “IPC Setup” application which will include several enhancements to the set up screens. These are scheduled to be released and available in TIS2WEB very soon. Important: Only IPC conditions listed in the Condition section of the bulletin are covered under this special coverage program. In a small number of vehicles, the condition may be intermittent and the gauge sweep test may not always verify the condition. IPC Performance IPC performance may be affected by the following conditions: Customer Comments and Observations Customers who describe gauge performance as jumpy, sticky, slow or erratic. Gauge performance may also be described as being inoperative or inaccurate. For example, for a period of time the speedometer may appear to move normally but be inaccurate and not return to zero (0) after the vehicle comes to a stop. This inaccurate condition may be more or less pronounced during the drive cycle and may, for a time, return to normal operation. A Tech 2 sweep test may not reveal the condition. 1. Perform a gauge sweep test to determine/verify that an IPC gauge is sticking, stuck, or inoperative. Using the Tech 2, navigate to the following screens to perform the gauge sweep test: Body -> Instrument Panel Cluster -> Special Functions -> IPC Gauges -> Display(s) Test. • Cold temperatures • Temperature fluctuations • High humidity • Driving over rough surfaces such as dirt roads or potholes

2003 GMC Truck C 1500 P/U 2WD Engine Knocking or Lifter Noise

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Engine Lubrication: All Technical Service Bulletins Engine – Knocking or Lifter Noise File In Section: 06 – Engine/Propulsion System Bulletin No.: 02-06-01-038 Date: December, 2002 TECHNICAL Subject: Engine Knock or Lifter Noise (Replace 0-Ring) Models: 2001-2002 Chevrolet Camaro 2001-2003 Chevrolet Corvette 2001-2002 Pontiac Firebird 2002-2003 Cadillac Escalade, Escalade EXT 2000-2003 Chevrolet Suburban, Tahoe 2001-2003 Chevrolet Silverado 2002-2003 Chevrolet Avalanche 2000-2003 GMC Yukon, Yukon XL 2001-2003 GMC Sierra 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) Condition 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). The noise may often be diagnosed as a collapsed lifter . Additionally, the noise may be present at cold start and appear to diminish and then return as the engine warms to operating temperature. This noise is different from other noises that may begin to occur at 3219-4828 km (2000-3000 mi). Cause The 0-ring seal between the oil pump screen and the oil pump may be cut, causing aeration of the oil. Correction

LM7, L59 or L33 Engines with Cold Start Rough or Incorrect Idle, Misfire, Malfunction Indicator Lamp (MIL) or Flashing Requiring O2 Sensor Replacement

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2004-2005 Cadillac Escalade 2004-2005 Chevrolet Avalanche, Silverado 1500, Suburban, Tahoe 2005 Chevrolet Silverado Hybrid (HP2) 2004-2005 GMC Sierra 1500, Yukon, Yukon XL 2005 GMC Sierra Hybrid (PH2) with Vortec 5300 5.3L V-8 Engine (VINs T, Z, B — RPOs LM7, L59, L33 Some customers may comment on a Malfunction Indicator Lamp (MIL) On or that the MIL is flashing. An actual engine misfire may or may not be felt along with an incorrect idle speed. Typically this occurs during cold winter months, on cold engine starts. Some vehicles may have been previously serviced for the same condition. Technicians may also find the following DTCs stored with the Tech 2® P0131, P0133, P0134, P0137, P0138, P0140, P0151, P0153, P0154, P0157, P1133, which may be in conjunction with P0171, P0174, P0300 and P1138. Cause Water shock occurs when water droplets are present in the exhaust. The water in the exhaust contacts the sensor element inside the HO2 sensor, causing the HO2 sensor element to crack. Correction Upon diagnostic investigation, the technician may find that the HO2 sensor requires replacement. In addition to replacing the affected HO2 sensor, these vehicles should also be reflashed with the latest PCM calibration. An updated PCM calibration will be available to dealerships as part of TIS 2000 incremental satellite update 11.0 (NAO version 25.010) or greater. Always, make sure your Tech 2 is updated with the latest software version

2002 Chevrolet Chevy Suburban – 4WD Intake Manifold Replacement Manual

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Removal Procedure Important: The intake manifold, throttle body, fuel rail, and injectors may be removed as an assembly. If not servicing the individual components, remove the manifold as a complete assembly. 1. Remove the throttle body. Refer to Throttle Body Assembly Replacement in Engine Controls – 4.8L, 5.3L, and 6.0L. 2. Remove the fuel injectors. Refer to Fuel Injector Replacement in Engine Controls – 4.8L, 5.3L, and 6.0L. 3. Disconnect the following electrical connectors: 4. Remove the knock sensor harness electrical connector from the intake manifold. 5. Set the electrical harness aside. <- Back Forward -> Document ID# 738735 2002 Chevrolet Chevy Suburban – 4WD Print – Manifold absolute pressure (MAP) sensor (1) – Knock sensor (2) – Exhaust gas recirculation (EGR) valve, if equipped. 6. If equipped, remove the following EGR pipe bolts: 7. If equipped, remove the EGR pipe with valve. 8. If equipped, remove the EGR pipe gasket from the exhaust manifold If equipped with vacuum assisted brakes, remove the vacuum brake booster hose from the rear of the intake manifold.

FORD 6.0L DIESEL CALIBRATION UPDATE VARIOUS ISSUES CALIBRATION

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The PCM and FICM calibration update contains model years covered and Integrated Diagnostic improvement actions to address the following System (IDS) calibration level. symptoms: 2005 F-Super Duty 6.0L: ISSUE Some 2003-2007 F-Super Duty vehicles, 2003-2005 •False DTC P0470 – Exhaust pressure sensor A Excursions and 2004-2010 E-Series vehicles, circuit fault due to a freezing condition. equipped with a 6.0L diesel engine may exhibit hard •False DTC P0404 – Exhaust gas recirculation start, no start, white smoke, lack of power, running (EGR) performance due to a stuck turbocharger rough condition after cold engine start up, or condition. diagnostic trouble codes (DTCs) P0404, P0470, •Cooling loss protection – Revised engine P0611, P1260 and/or P1378 issues. Refer to the protection strategy when an engine Calibration Content for information detailing specific over-temperature condition is present. Vehicles vehicle content by vehicle application and model updated with this service calibration will display year that is being addressed by this calibration higher temperature gauge readings when high update. engine oil temperature (EOT) conditions or high engine coolant temperature (ECT) are This article includes previously released calibration encountered and may disable EGR operation to content that improves injector performance in cold prevent possible EGR cooler damage. engine operation and additional diagnostic capabilities and product protection strategy •Oil cooler efficiency monitor – DTC P012F stored enhancements. These enhancements provide and wrench warning lamp illuminated when the oil additional diagnostic capabilities, adds additional coolers efficiency drops below a specified new DTCs and engine protection strategies. Refer threshold for a given speed and vehicle load to the Calibration Content for additional details. See condition. the appropriate Powertrain Control/Emissions •Turbocharger vane sweep strategy – Performs a Diagnostic (PC/ED) manual for technical sweep of the turbocharger vanes and unison ring descriptions and diagnostic routines associated with during stationary idle conditions. Vane sweep can new DTCs. occur once per hour to help reduce turbocharger sticking. ACTION •FICM low voltage detection monitor – DTC P0560 Reprogram the powertrain control module (PCM) stored and wrench warning lamp illuminated when using IDS release 63.13 and higher or 64.01 and PCM vehicle power (VPWR) parameter identifier higher. The transmission control module (TCM) and (PIDS) is below 10.25V for 60 seconds or below fuel injector control module (FICM) , will 9V for 4 seconds. automatically update if they are not at the latest •Turbocharger over boost detection – DTC P0234 calibration level. This new calibration is not included stored and wrench warning lamp illuminated when in the VCM 2009.11 DVD. Calibration files may also a turbocharger over boost condition occurs. be obtained at www.motorcraft.com. 2006-2007 F-Super Duty 6.0L: CALIBRATION CONTENT •False DTC P0404 – EGR performance due to a Reprogram the PCM to the latest calibration stuck turbocharger condition