GMC TruckSafari 4WD1991Overview/gmc-truck/safari-4wd/1991/base/

1991 GMC Truck Safari 4WD

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1991 Safari 4WD.

The 1991 GMC Truck Safari 4WD carries a 5W-30 API oil specification with a 4-quart fill capacity, straightforward mechanical details that anchor its place in the model’s 1990–2005 complaint history. Reliability data for this year shows 52 owner complaints and 4 recalls, with the top complaint area concentrated in service brakes, hydraulic. Relative to the broader model record, this complaint load sits well below the 1995 high-water mark of 201 grievances yet remains above the 2005 low of 5, positioning the 1991 edition as a moderate early-run entry before the line’s later peak in reported issues.

Model year20041999199819921991

Quick specs

Fluid capacities, tune-up values and fuel economy at a glance.

Engine oil capacity4 qtOEM · verified
Engine oil type5W-30 APIOEM · verified
Lug nut torque100 ft-lbsOEM · verified

Fitment & sizes

Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.

From the factory this vehicle uses OE oil filter 12737090. Note the factory fuel filter is now discontinued — plan on a superseded or quality aftermarket equivalent, which the part pages below list where known. Each part links to every other vehicle that shares it, so a part you already stock may fit more of your fleet than you'd expect.

OE service part numbers OEM · verified

Engine oil filter12737090
Engine air filter25040929 alt 25098766
Fuel filter25171792 discontinued
Spark plug19302741
Front wiper blades15184702
Serpentine belt88986825 alt 12576753
Thermostat10207373 alt 10105135

Service quick specs OEM factory data

Capacities, torques and tune-up values from the factory service manual.

This engine holds 4 qt of 5W-30 API engine oil, 80W-90 · GL-5 in the differential, DOT 3 brake fluid. Torque lug nuts to 100 ft-lbs.

Lubricants & capacities

Brake FluidDOT 3
Differential Gear Oil80W-90 · GL-5
Differential Gear Oil Capacity4.0 qt
Engine CoolantETHYLENE GLYCOL
Engine OilAPI · 5W-30
Engine Oil Capacity4 qt

Chassis torques

Lug Nuts100 ft-lbs

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the engine oil and filter at 7,500 mi; coolant every 30,000 mi. The big-interval services (every 30,000 mi for coolant, and the transmission fluid) are the ones owners most often skip — on a lower-mileage example, assume the original fluids are still in it and check them first.

At 7,500 miDrive Axle Assembly (drain & refill) · Engine Oil Filter (replace) · Throttle Body (torque) · Tire & Wheel Assembly (rotate)
Every 7,500 miBody Latches, Locks & Hinges (inspect) · Brake Line (inspect) · Brake Linings (inspect) · CV Joint Boot (inspect) · Driveshaft U-Joint (lubricate) · Engine Oil (drain & refill)
Every 15,000 miEngine Oil Filter (replace) · Tire & Wheel Assembly (rotate)
Every 30,000 miClutch Cross Shaft (lubricate) · Clutch Release Lever Pivot Points (lubricate) · EGR System (inspect) · Early Fuel Evaporation System (inspect) · Engine Air Filter Element (replace) · Engine Coolant System (drain, flush & refill)
Every 60,000 miAccessory Drive Belt (inspect) · Fuel Filter (replace) · Fuel Line (inspect) · Fuel Tank (inspect) · Fuel Tank Filler Cap (inspect) · Ignition Timing (inspect)

Reliability & federal safety record

Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.

Owner complaints about the 1991 GMC Truck Safari 4WD dominate in one area — the service brakes, hydraulic, 17 of 52 reports (33%), well ahead of the next concern. That matters, because the service brakes, hydraulic are also the target of recall 93V-119 on this vehicle — so the single most useful check before buying or servicing one is confirming it was actually performed. 5 of the reports describe a crash and 5 a fire — a small share of the total, but worth weighing against the service brakes, hydraulic pattern above. These are tallies of what owners actually reported to the federal government, not an editorial score — and higher-selling models naturally rack up more reports.

4
Open recalls
NHTSA campaigns
0
Service bulletins
Manufacturer communications
0
ODI investigations
Office of Defects Investigation
52
Owner complaints
5 involved a crash · 5 a fire
Owner complaints by model year NHTSA · this generation & adjacent

Owner complaints filed with NHTSA, by component

All 52 complaints on record, top 8 components.

Service Brakes, Hydraulic17
Seats4
Power Train3
Vehicle Speed Control3
Seat Belts2
Unknown Or Other2
Equipment2
Electrical System2

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 4 campaigns on record for this vehicle.

06E043000Fuel System, GasolineReported 19/05/2006

CERTAIN REPLACEMENT FUEL FILTERS, FRAM BRAND NAME P/N G3727, WITH DATE CODES X52911 THROUGH X60801 SEQUENTIALLY OR X600141 AND A MEXICO COUNTRY OR ORIGIN MARKING ON THE FUEL FILTER HOUSING MANUFACTURED FROM OCTOBER 18… Remedy: HONEYWELL WILL NOTIFY OWNERS AND REPLACE THE FUEL FILTERS FREE OF CHARGE. THE RECALL BEGAN ON OCTOBER 18, 2006. OWNERS MAY CONTACT FRAM CUSTOMER SERVICE AT 1-800-890-2075 (OPTION…

93V119000Service Brakes, Hydraulic:Foundation Components:Disc:RotorReported 02/08/1993

SEVERE CORROSION DUE TO ROAD SALT AT THE JOINT OF THE STAMPED STEEL CENTER SECTION AND THE CAST OUTER SECTION CAN CAUSE THE SECTIONS TO SEPARATE. Remedy: REPLACE THE FRONT BRAKE ROTORS WITH NEW ROTORS WITH A CORROSION PROTECTION COATING. HOWEVER, IF REPLACEMENT OF BRAKE LININGS ARE NECESSARY, IT WILL BE DONE AT OWNER'S EXPENSE…

Common OBD-II trouble codes

The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.

P0420
Catalyst system efficiency below threshold — Bank 1
P0300
Random / multiple cylinder misfire detected
P0171
System too lean — Bank 1
P0455
Evaporative emission system leak detected — large leak
P0128
Coolant thermostat below regulating temperature
P0442
Evaporative emission system leak detected — small leak

VIN tools

Decode factory build data for a specific vehicle by VIN.

VIN
Decode a VIN to confirm the transmission and build data for a specific Safari 4WD. OEM
Build data
Plant, GVWR class, engine and body data for any 17-character VIN.
Recalls
Check open recall campaigns against a specific vehicle by VIN.

Vehicles with shared specs

Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.

Reference guides

Cross-vehicle references for the kinds of data on this page.

Frequently asked

How much oil does the 1991 Safari 4WD take?

4 qt of ABOVE 40 degrees F 30W API, ABOVE 0 degrees F 5W-30 API, per the factory manual.

Does the 1991 Safari 4WD have open recalls?

NHTSA lists 4 recall campaign(s) for this model year. Check your specific vehicle by VIN.