2003 Chevrolet Avalanche Technical Service Bulletins

145 technical service bulletins (TSBs) are on record for the 2003 Chevrolet Avalanche. 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.

• 10013129Oct 8, 2008Transmission and drivetrain. Service engine soon light is illuminated and the vehicle may not start. Diagnostic trouble code p0706, which relates to transmission range switch performance may be stored.
• 10026804Oct 1, 2008Transmission and drivetrain. Gmc: fluid leak from transmission oil cooler lines due to corrosion. All 2000-2006 light duty trucks equipped with the light duty automatic transmission.
• 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.
• 10026805Sep 1, 2008Equipment. Buick chevrolet gmc service campaign: see document search button for owner letter. Special coverage adjustment-analog onstar deactivation. Csc letter was received.
• 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.
• 10026744Jun 1, 2008Seats, Electrical system. Gmc: sir mil dtc b0084 and/or b0085. This concern could be caused by broken seat position sensor circuits under the driver or passenger front seats. Over time, from repeated seat movement, the wiring could break.
• 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.
• 10024345Feb 1, 2008Transmission and drivetrain, Suspension. 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.
• 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
• 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)
• 10022482Aug 15, 2007Electrical system. Additional diagnostic for yaw/lat sensor dtc's.
• 10021676Jun 15, 2007Transmission and drivetrain. New design front axle side bearing adjusters.
• 10022470Jun 1, 2007Brakes. Abs light on, dtc's c0265, c0201, u1041 set and/or loss of communication with brake module. (reground ebcm ground).
• 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.
• 10021015Feb 22, 2007Electrical system. Unable to locate emergency light relay and/or blunt cut wires.
• 10012089Feb 1, 2007Steering. Clunking noise under hood and can be felt in steering wheel. *eh updated *eh updated.
• 10011755Oct 4, 2006Body and structure. Tailgate cable slack. This includes 1998-2006 chevrolet and gmc full and mid size trucks. *eh updated.
• 10020874Sep 23, 2006Suspension. Left front axle shaft difficult to remove. Axle differential leak seal shaft.
• 10019852Mar 1, 2006Suspension. Revised upper control arm replacement.
• 10013456Feb 1, 2006Air bags. Supplemental inflatable restraint (sir) light on, diagnostic trouble codes (dtc) b0026 and/or b004. To include 2003-2006 chevrolet/gmc full size pickup and utility models.
• 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.
• 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.
• 10017299Nov 2, 2005Transmission and drivetrain. Electronic transfer case unable to complete shift.
• 10017277Nov 1, 2005Visibility (wipers, defrost, mirrors). Unwanted operation of rear windows.
• 10011197Nov 1, 2005Suspension. 20 inch wheels and tires available through gmspo. *tt updated.
• 10017190Oct 27, 2005Transmission and drivetrain. 4l60e, 4l65e replacement valve body gaskets does not seem to fit.
• 10017123Oct 25, 2005Visibility (wipers, defrost, mirrors). Service vme-outside rear view mirror inoperative.
• 10017023Oct 21, 2005Electrical system. Additional diagnostic information dtc p0757.
• 10017764Oct 1, 2005Seats. Unwanted/loose seat movement.
• 10016714Sep 28, 2005Suspension. Automatic level control inoperative due to water ingestion.
• 10016558Sep 22, 2005Transmission and drivetrain. Intermittent service 4wd light comes on with diagnostic trouble code (dtc) c0306 or c0308 stored in tccm.
• 10016529Sep 20, 2005Visibility (wipers, defrost, mirrors). Service vme - outside rearview mirror vibration.
• 10015018Sep 1, 2005Equipment. Information on upgrading certain onstar generation 5 analog/digital-ready systems to onstar generation 6 dual-mode (analog/digital).
• 10017380Aug 1, 2005Seats. Intermittent heated seats inoperative, diagnostic trouble code b3941 set.
• 10011232Aug 1, 2005Seats. Memory seat may not return to requested position.
• 10014953May 12, 2005Transmission and drivetrain. Rear axle retainer button breakage.
• 10014899May 11, 2005Steering. Steering idler arm inspection procedure.
• 10014870May 11, 2005Engine cooling. 1999 - 2005 gen ii cold engine misfire at idle with possible p0171 and/or p0174.
• 10014853May 11, 2005Transmission and drivetrain. Intermittent malfunction indicator lamp (mil) with diagnostic trouble code (dtc) c0374 or erratic 4wd/awd operation.
• 10017409May 1, 2005Engine cooling. Oil leak under extreme cold temperatures (-34 degrees c) (-30 degrees f) or colder).
• 10017360May 1, 2005Visibility (wipers, defrost, mirrors). Sunroof jams when closing.
• 10013572Apr 21, 2005Transmission and drivetrain. 4wd models with noise, vibration on dry pavement.

← All problems reported for the 2003 Chevrolet Avalanche