2003 GMC Sierra Technical Service Bulletins

206 technical service bulletins (TSBs) are on record for the 2003 GMC Sierra. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 10025770Sep 5, 2008Equipment. Some customers may comment on various hvac concerns including temperature doors defaulting to full hot position or unable to obtain defrost position.
• 10026542Sep 1, 2008Electrical system. Cadillac chevrolet gmc service campaign: see document search button for owner letter. Some vehicles could develop a condition where one or more of the instrument panel gauge needles may stick, flutter, or become inoperative. Csc letter received. Updated 11/6/08.
• 10023585Sep 1, 2008Electrical system. Cadillac chevrolet gmc service campaign: see document search button for owner letter. Instrument panel cluster gauge needle function may cause inaccurate readings on some 2003-2004 cadillac, chevrolet, and gmc vehicles. *nj updated 2/5/08. *nj updated 9/5/08. *pe updated 11/4/08.
• 10026704Aug 1, 2008Fuel system. Gmc: fuel gauge fluctuation in park or neutral, causing the low fuel light to illuminate.
• 10026586Jun 1, 2008Equipment. Buick cadillac chevrolet gmc hummer oldsmobile pontiac saab saturn service campaign: see document search button for owner letter. Special coverage adjustment-analog onstar deactivation. Fcc ruled in 2002 wireless carriers would no longer re required to support analog wireless network starting in 2008. *pe csc letter was received. Updated 12/1/08.
• 10021013May 1, 2008Suspension. Suspension vibration or frame beaming at 40 - 60 mph. *kb updated 8/25/08.
• 10025462Apr 1, 2008Transmission and drivetrain. Diagnostic information on mn8, mt1 ses/mil illuminated, dtc p0757, harsh shift, delayed 2-3 shift, 2-3 shift flare, no third gear, slips in third gear or reverse.
• 10025148Apr 1, 2008Steering. Clunking noise under hood and can be felt in steering wheel and/or steering column (replace upper intermediate steering shaft [I-shaft] assembly).
• 10024345Feb 1, 2008Suspension, Transmission and drivetrain. Eaton locking differential chatter shudder noise on turns, equipped with a locking rear differential rpo g80. *nj updated 7/17/2008.
• 10024344Feb 1, 2008Engine cooling. Possible engine oil leak due to pcv freeze-up, equipped with the 4.8, 5.3, 6.0, and 6.2 v-8 engines.
• 10024154Feb 1, 2008Engine cooling. Chevrolet gmc service campaign: see document search button for owner letter. Special coverage adjustment - engine glow plug on certain vehicles with 6.6l diesel v8 (rpo lb7 - vin 1) engine & california emissions (yf5/ne1) or clean fuel emissions (vcl). Csc was received.
• 10017464Jan 1, 2008Transmission and drivetrain. Service 4wd light illuminated, diagnostic trouble code (dtc) c0374 set. *tt updated 10/05/07. *nj inspect wiring harness to transfer case speed sensors, replace wiring harness. Updated 7/18/08
• 10023773Dec 1, 2007Transmission and drivetrain. Dtc c0327 with or without additional dtc's setting. With four wheel drive (4wd) only.
• 10022914Oct 4, 2007Electrical system. One of the following concerns when programming the mileage or the hours into an exchange instrument panel cluster that is received from an electronic service center (esc).
• 10022766Sep 26, 2007Electrical system. Blown mbec 1 or lbec 1 fuse.
• 10023217Sep 1, 2007Exterior lighting. Turn signal in camper style outside rearview mirror (rpo dpn) does not illuminate turn signal flash (replace upper mirror glass)
• 10022360Aug 3, 2007Transmission and drivetrain. Allison lct1000 harsh 3-2, 2-1 downshift, and abs may activate.
• 10012694Aug 1, 2007Steering. Release of steering gear stub shaft bearing kit for service. *tt updated 08-15-07. *kb updated 10/09/07.
• 10021676Jun 15, 2007Transmission and drivetrain. New design front axle side bearing adjusters.
• 10021673Jun 15, 2007Interior lighting. Ipc backlighting inoperative tbc 2a fuse open.
• 10022470Jun 1, 2007Brakes. Abs light on, dtc's c0265, c0201, u1041 set and/or loss of communication with brake module. (reground ebcm ground).
• 10021839May 1, 2007Engine cooling. Diesel engine cylinder head gasket missing thickness grade markings.
• 10021133Mar 13, 2007Brakes. Service brake booster message.
• 10021075Mar 1, 2007Tires. Unable to program tire size in ebcm/vses.
• 10021021Feb 22, 2007Engine cooling. Service vme. Supplement to 00-02-35-003l. Update on new I-shaft.
• 10021019Feb 22, 2007Transmission and drivetrain. Slip condition in 2nd, 3rd, or 4th. Damaged 2-4 or 3-4 clutch. *kb updated 10/31/07.
• 10021016Feb 22, 2007Air bags. Dual stage passenger air bag used in single stage application.
• 10021015Feb 22, 2007Electrical system. Unable to locate emergency light relay and/or blunt cut wires.
• 10021116Jan 1, 2007Suspension. Inspection of tire and wheel size prior to diagnosis of transmission shifts, poor performance, speedometer, cruise control concerns.
• 10011126Dec 1, 2006Engine cooling. Various intermittent driveability conditions - hesitation, lack of power, etc.
• 10020582Oct 11, 2006Fuel system. Dual tanks fuel gauge defaults to empty - new calibrations. Stall start tank transfer. Vehicles with 6.6l rpo lb7 or lly engines.
• 10011755Oct 4, 2006Body and structure. Tailgate cable slack. This includes 1998-2006 chevrolet and gmc full and mid size trucks. *eh updated.
• 10012561Oct 1, 2006Engine cooling. Information on servicing fuel injectors to avoid contamination. *eh updated 03-19-07.
• 10020874Sep 23, 2006Suspension. Left front axle shaft difficult to remove. Axle differential leak seal shaft.
• 10020238Aug 21, 2006Transmission and drivetrain. Clutch pedal fade or clutch will not disengage typically when towing.
• 10020072Jul 19, 2006Engine cooling. Turbocharger oil feed line kinked or restricted.
• 10020839May 1, 2006Engine cooling. Diagnostic information on turbocharger malfunction due to lack of engine oil for lbz, lb7, and lly duramax diesel engine.
• 10019426Mar 15, 2006Engine cooling. Generation iii v8 engine piston repairs.
• 10019852Mar 1, 2006Suspension. Revised upper control arm replacement.
• 10018926Jan 25, 2006Transmission and drivetrain. 4wd inoperative and possible dtc c0327 stored in the transfer case control module.
• 10018623Jan 9, 2006Visibility (wipers, defrost, mirrors). Front hvac blower inoperative.
• 10018560Jan 6, 2006Fuel system, Other or unknown. Service vme - 2006 duramax diesel engine fuel system components are not interchangeable with earlier year model vehicles.
• 10018544Jan 6, 2006Seats. Heated seat inoperative or shut off in 30 seconds. Diagnostic trouble codes b2435, b2440, b3606 and/or b1825 set in the drivers seat module.
• 10019474Jan 1, 2006Engine cooling. Information on longer main bearing cap bolts required for certain 2001-2006 lb7, lly, lbz duramax diesel engines.
• 10019582Dec 1, 2005Engine cooling. Lack of power lu3 engine) at high ambient temperatures only (if necessary, reprogram pcm with new service calibration).
• 10017303Nov 2, 2005Fuel system. Duramax diesel pilot to main injection fuel knock noise.
• 10017299Nov 2, 2005Transmission and drivetrain. Electronic transfer case unable to complete shift.
• 10018733Nov 1, 2005Engine cooling. Engine oil leak at rear cover assembly area.
• 10017277Nov 1, 2005Visibility (wipers, defrost, mirrors). Unwanted operation of rear windows.
• 10017273Nov 1, 2005Fuel system. Fuel gauge is inaccurate or reads empty on diesel equipped chassis cab with dual tanks.

← All problems reported for the 2003 GMC Sierra