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Service bulletins for the 1999 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.

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

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By component

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

Bulletins, newest first
99027B2000-01-12. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES. GENERAL MOTORS HAS DECIDED THAT SOME VEHICLES MAY HAVE THE AUXILIARY TRANSMISSION OIL COOLER OMITTED. *TT
990271999-11-24. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. GENERAL MOTORS HAS DECIDED THAT SOME VEHICLES EQUIPPED WITH 4.8L OR 5.3L ENGINES AND 4L60-E AUTOMATIC TRANSMISSIONS, AND VEHICLES EQUIPPED WITH 3.73 REAR AXLES AND ORDERED WITH THE HEAVY-DUTY TRAILERING PACKAGE MAY NOT HAVE INCLUDED THE MERCHANDISING-INTENT AUXILIARY TRANSMISSION OIL COOLER. *TT
99027A1999-10-19. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. SUBJECT REGARDING AUXILIARY TRANSMISSION OIL COOLER OMITTED. *TT
99027A1999-10-05. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES. GENERAL MOTORS HAS DECIDED THAT SOME VEHICLES MAY NOT HAVE INCLUDED THE MERCHANDISING-INTENT AUXILIARY TRANSMISSION OIL COOLER (KNP). *TT
990271999-09-30. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES. GENERAL MOTORS HAS DECIDED THAT SOME VEHICLES MAY NOT HAVE INCLUDED THE MERCHANDISING-INTENT AUXILIARY TRANSMISSION OIL COOLER (KNP). *TT
990730010A1999-09-20. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. A DRIVELINE VIBRATION / GROWL NOISE. *TT
9904210031999-08-06. Service bulletin. POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE). SOME OWNERS MAY COMMENT ABOUT A SLIPPING TYPE CONDITION AT THE FRONT WHEELS WHILE THE VEHICLE IS IN FOUR WHEEL DRIVE (4WD). *TT
9907300091999-08-06. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. SUBJECT PERTAINING TO HARSH 1 - 2 AND 3 - 2 SHIFTS. *TT
9907300101999-08-06. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. DRIVELINE VIBRATION / GROWL NOISE. *TT

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