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Service bulletins for the 2003 Chevrolet Silverado

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

1069 on file from NHTSA, as of 2026-10-19.

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Only bulletins with component: Transmission and driveline are shown. Show all

Bulletins, newest first
030730037B2004-02-11. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. TRANSMISSION OIL LEAK, ABNORMAL KNOCKING NOISE HEARD AT IDLE. *TT
030421001D2004-02-11. Service bulletin. POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE). 4-WHEEL DRIVE SWITCH INDICATOR LIGHTS FLASHING, 4-WHEEL DRIVE INOPERATIVE, DIAGNOSTIC TROUBLE CODES C0327, P0836, P0500. *TT
010730038B2004-02-10. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. THE SERVICE ENGINE SOON LAMP IS ILLUMINATED, NO 3RD AND 4TH GEAR, THE TRANSMISSION DOES NOT SHIFT CORRECTLY, THE TRANSMISSION FEELS LIKE IT SHIFTS TO NEUTRAL OR A LOSS OF DRIVE OCCURS. *TT
0116032004-01-30. Service bulletin. POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE). CONCERNS WITH THE SERVICE FOUR-WHEEL DRIVE LIGHT OR THE FOUR-WHEEL DRIVE IS INOPERATIVE WITH A C0327 CODE STORED IN THE TCCM. GM VOICEMAIL EXPRESS. *TT
0307300532004-01-05. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. ALLISON AUTOMATIC TRANSMISSION VALVE BODY HARDWARE CHANGES. *TT
0307300542004-01-05. Service bulletin. POWER TRAIN. TRANSMISSION FLUID LEAKS OUT OF VENT WHEN TRUCK IS STARTED AFTER A COLD SOAK. *TT
030419001A2004-01-02. Service bulletin. POWER TRAIN:AXLE ASSEMBLY. USE OF SYNTHETIC FRONT AXLE LUBRICANT FOR 4WD VEHICLES SOLD IN COLD WEATHER CLIMATES. *TT THIS BULLETIN REPLACED PREVIOUS BULLETIN DATED 10/01/2003. *TT
00908C2003-12-05. Service bulletin. POWER TRAIN:MANUAL TRANSMISSION. 6.6L AND MANUAL TRANSMISSION GROWL NOISE WHILE ENGAGING OR DISENGAGING CLUTCH. THESE ARE C/K MODELS. *TT
030730031D2003-12-04. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. TRANSMISSION LEAKS, SLIPS, VEHICLE WILL NOT MOVE. *TT
0304190042003-12-04. Service bulletin. POWER TRAIN:AXLE ASSEMBLY. GROWL OR MOAN NOISE COMING FROM FRONT AXLE. *TT
020421006C2003-12-04. Service bulletin. POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE). INOPERATIVE 4WD/AWD LAMPS, INOPERATIVE 4WD/AWD SYSTEM. *TT
0307300442003-12-02. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. INFORMATION ON ALLISON TRANSMISSION SERVICE REPAIRS - FULL SERVICE OF INTERNAL COMPONENTS. *TT
0307300382003-12-02. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. TRANSMISSION OIL LEAK, ABNORMAL KNOCKING NOISE HEARD AT IDLE. 2500/3500 SERIES PICKUP MODELS. *TT
0307300372003-12-02. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. TRANSMISSION OIL LEAK, ABNORMAL KNOCKING NOISE HEARD AT IDLE. 2500/3500 SERIES PICKUP MODELS. *TT
00559B2003-11-25. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. 4L80E/4L85E MAY SET A DIAGNOSTIC TROUBLE CODE (DTC) P0706 (TRANSMISSION RANGE SWITCH PERFORMANCE) AND EXHIBIT A NO START CONDITION. *TT
014102003-11-22. Service bulletin. POWER TRAIN. POOR PERFORMANCE FROM A STOP IN 2WD, AUTO OR 4WD HI. 2003, 2003 CADILLAC EXT ALSO INCLUDED. *TT
01267B2003-11-21. Service bulletin. POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE). SERVICE 4WD LIGHT ON NO CODES BESIDES U1000 CODES. SERVICE VME. *TT
00557B2003-11-21. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. THE ALLISON LCT1000 TRANSMISSIONS MAY EXPERIENCE A LEAK FROM OIL PUMP AREA. *TT
00938B2003-11-21. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). ALLISON LCT1000 REPEAT TRANSMISSION CONTROL MODULE (TCM) FAILURES WITH POSSIBLE MULTIPLE DIAGNOSTIC TROUBLE CODES (DTCS). *TT
01129A2003-11-20. Service bulletin. POWER TRAIN. ALLISON LCT1000 SERVICEABILITY. *TT
01267A2003-11-19. Service bulletin. POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE). SERVICE 4WD LIGHT ON, THE 4WD IS INOPERATIVE AND NO CODES BESIDES U1000 CODES. SERVICE VME. *TT
0804032003-11-05. Service bulletin. POWER TRAIN. THIS VME MESSAGE APPLIES TO THE VALVE BODY FOR THE ALLISON SERIES 1000 TRANSMISSION REVISED FOR THE 2004 MODEL YEAR TO ADD MODULATED MAIN PRESSURE CONTROL. THIS REVISION WILL PROVIDE ADDITIONAL TRANSMISSION OIL COOLER FLOW AND REDUCE PUMP LOAD DURING CERTAIN LOW SPEED OPERATING CONDITIONS. *TT
0521032003-10-28. Service bulletin. POWER TRAIN. ESSENTIAL TOOLS FOR SERVICING THE ALLISON TRANSMISSION. THESE TOOLS INCLUDE A FOUR-WHEEL DRIVE SPANNER NUT WRENCH, REAR BEARING PULLER LEGS, DIGITAL DEPTH MICROMETER AND A REAR BEARING INSTALLER. THESE TOOLS ARE REQUIRED TO REPLACE A CRACKED EXTENSION HOUSING ON AN ALLISON INSTALLED IN A FOUR-WHEEL DRIVE PICK-UP. 2004 SIERRA INCLUDED. TT
030730020A2003-09-29. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. TRANSMISSION HAS A HARSH 1-2 SHIFT, SLIPPING 1-2 SHIFT FOLLOWED BY A HARSH ENGAGEMENT. *TT
030421001C2003-09-29. Service bulletin. POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE). 4-WHEEL DRIVE SWITCH INDICATOR LIGHTS FLASHING, 4-WHEEL DRIVE INOPERATIVE, DIAGNOSTIC TROUBLE CODES C0327, P0836, P0500. *TT

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.