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Service bulletins for the 1991 GMC Safari

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.

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

By type

By component

Bulletins, newest first
PIT-3665-A2009-05-30. Service bulletin. SERVICE BRAKES, HYDRAULIC:PEDALS AND LINKAGES. GENERAL MOTORS: ON ALL 1988-2009 FULL SIZE CHEVROLET/GMC PICKUPS, UTILITIES AND VANS, THE BRAKE PEDAL WILL MOVE DOWN OR SELF APPLY DURING FULL LOCK TURNS OR NEAR FULL LOCK TURNS. CHEVROLET ASTRO AND GMC SAFARI VANS; HUMMER 2 ARE INCLUDED. *PE UPDATED 5/24/11. *PE
990730016A2004-07-13. Service bulletin. POWER TRAIN. DIAGNOSTIC INFORMATION FOR INTERMITTENT TRANSMISSION DOWNSHIFT, SLIP, BUSY/CYCLING TCC OR NOISY COOLING FAN. *TT
016672004-06-04. Service bulletin. VISIBILITY. WINDOW REGULATOR MOTOR DOES NOT FIT. *TT
020730024A2002-10-11. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:LEVER AND LINKAGE:COLUMN SHIFT. DIAGNOSIS OF CRACKED OR BROKEN TRANSMISSION CASE. *TT 2006 AND PRIOR CARS AND LIGHT DUTY TRUCKS. *TT
3761051995-11-01. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. COLD ENGINE KNOCK. *TW
CAMP/91C501995-11-01. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. UNKNOWN
RCL/91C501995-02-28. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. CALIFORNIA RECALL - GENERAL MOTORS HAS DETERMINED THAT CERTAIN 1991 C/K TRUCKS, M/L AND G VANS WITH 4.3L ENGINES MAY BE EMITTING NON-METHANE HYDROCARBONS IN EXCESS OF CALIFORNIA EMISSION STANDARDS. TO CORRECT THIS CONDITION, DEALERS ARE TO INSTALL A NEW EXHAUST OXYGEN SENSOR. *TW
4761491995-02-09. Service bulletin. UNKNOWN OR OTHER. OIL PRESSURE GAUGE READING CONCERNS. *TW
4671081995-02-08. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. TRANSMISSION EXTENTION SEAL LEAKS. *TW

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