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1998 GMC Truck Safari 4WD

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1998 Safari 4WD.

Operating within the 1990 to 2005 years covered, the 1998 GMC Truck Safari 4WD requires 4.5 qt of 5W-30 API oil for engine maintenance and carries a record of 112 total owner complaints alongside 5 recalls. Service Brakes, Hydraulic emerge as the top complaint area for this year, which positions the vehicle in a moderate reliability slot within the history. Specifically, the 1998 figures fall well below the 201 complaints peak of 1995 but remain higher than the 5 complaints recorded in 2005.

Model year2004 1999 1998 1992 1991

Quick specs

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

Engine oil capacity4.5 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 a BCI 78 · 600 CCA battery, OE oil filter 19210286. Note the factory fuel filter is now discontinued — plan on a superseded or quality aftermarket equivalent, which the part pages below list where known.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.

Battery groupBCI 78 · 600 CCAOEM · verified

Tire sizeP215-75R15OEM · verified

Wheel / rim6-, 6.5-JJ; 6.5-JJ inOEM · verified

OE service part numbers OEM · verified

Engine oil filter	19210286
Engine air filter	19259086
Fuel filter	25171792 discontinued
Spark plug	12681665
Front wiper blades	15184702
Serpentine belt	12576572 alt 19355374
Thermostat	12632948 alt 12551507

Service quick specs OEM factory data

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

This engine holds 4.5 qt of 5W-30 API engine oil. Torque lug nuts to 100 ft-lbs, the oil drain plug to 18.0 ft-lbs. The firing order is 1-6-5-4-3-2. Note the cylinder-head bolts finish on a torque angle (torque-to-yield) — they stretch permanently and should be replaced, not reused, during any head service.

Lubricants & capacities

Engine Oil	5W-30 · API
Engine Oil Capacity	4.5 qt

Engine torques

Crankshaft Pulley and/or Damper Bolts	74 ft-lbs
Engine Oil Pan Drain Plug	18.0 ft-lbs
Engine Valve Cover Bolts	8.85 ft-lbs

Chassis torques

Leaf Spring to Axle (U-bolts)	74.0 ft-lbs
Leaf Spring to Chassis Bracket	74.0 ft-lbs
Leaf Spring to Rear Shackle	103.0 ft-lbs
Leaf Spring Rear Shackle to Chassis Bracket	74.0 ft-lbs
Lug Nuts	100 ft-lbs
Transfer Case Fill Plug	18.0 ft-lbs
Transfer Case Drain Plug	18.0 ft-lbs
Front Wheel Hub	147 ft-lbs

Ignition

Cylinder Firing Order	1-6-5-4-3-2
Cylinder Firing Order	1-6-5-4-3-2
Spark Plug Manufacturer	AC Delco
Spark Plug Gap	0.060 in
Spark Plug Torque	11-14 ft-lbs

Battery & A/C

Refrigerant	R134a
Oil Group	PAG
Oil Type	46
Standard BCI Group Number	78
Standard BCI Cranking Performance	600 cca

Service checks

Pressure Test	20 psi
Radiator Cap Pressure Relief	15 psi
Thermostat Opening Temperature	188-206 °F
Fuel Pump Pressure Minimum	66.0 psi
Key ON Engine OFF (KOEO)	60-66
RPM	50-63 @ Idle rpm
Engine Compression	100 Minimum psi
Engine Compression	215 Nominal psi

Brakes

Torque to Knuckle	38 ft-lbs
Torque to Knuckle	38 ft-lbs
Minimum Pad Thickness	Front: 0.030; Rear: 0.030 specification
Rotor Max Parallel Variation	0.0005 in
Rotor Runout Limit	0.003 in
Rotor Nominal Thickness From	1.04 in
Rotor Nominal Thickness To	1.04 in
Rotor Minimum Machining	0.98 in

Multi-step torque procedures OEM · verified

Cylinder Head — tightening sequence 4 stages

1	all bolts	22 ft. lbs
2	long bolts	75 degrees
3	medium bolts	65 degrees
4	55

Cylinder Head — tightening sequence 1 stages

all bolts

22 ft. lbs

Exhaust Manifold to Cylinder Head Bolts — tightening sequence 1 stages

22.0

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the spark plugs every 100,000 mi; coolant at 150,000 mi. The big-interval services (at 150,000 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.

Every 7,500 mi	Axle Shaft Oil Seal (inspect) · Body Latches, Locks & Hinges (inspect) · Brake Pedal Assembly (lubricate return spring) · CV Joint Boot (inspect) · Clutch Pedal Bushing (lubricate) · Clutch Pedal Clevis Pin (lubricate)
Every 30,000 mi	Engine Air Filter Element (replace) · Fuel Filter (replace) · Wheel Bearing (inspect)
Every 50,000 mi	Transmission Fluid & Filter (replace)
Every 60,000 mi	Accessory Drive Belt (inspect) · Fuel Line (inspect) · Fuel Tank (inspect) · Fuel Tank Filler Cap (inspect)
Every 100,000 mi	Spark Plug Wires (inspect) · Spark Plugs (replace)
At 150,000 mi	Engine Coolant System (drain, flush & refill)

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 1998 GMC Truck Safari 4WD top in one area — the service brakes, hydraulic, 14 of 112 reports (12%), well ahead of the next concern. None of this vehicle's 5 recall campaigns target the service brakes, hydraulic, so those reports read as owner-reported wear-and-tear rather than an acknowledged defect. 15 of the reports describe a crash and 1 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.

Open recalls

NHTSA campaigns

Service bulletins

Manufacturer communications

ODI investigations

Office of Defects Investigation

112

Owner complaints

15 involved a crash · 1 a fire

Owner complaints by model year NHTSA · this generation & adjacent

’90 ’91 ’92 ’93 ’94 ’95 ’96 ’97’98’99 ’00 ’01 ’02 ’03 ’04 ’05

Owner complaints filed with NHTSA, by component

All 112 complaints on record, top 8 components.

Service Brakes, Hydraulic14

Visibility8

Vehicle Speed Control8

Power Train6

Electrical System6

Steering6

Suspension5

Fuel System, Gasoline5

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 5 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…

06E026000Exterior LightingReported 23/03/2006

CERTAIN PRO-A MOTORS CORNER LAMPS, TURN SIGNALS, AND HEADLIGHTS SOLD AS REPLACEMENT LAMPS FOR USE ON CERTAIN PASSENGER VEHICLES LISTED ABOVE. SOME COMBINATION LAMPS THAT ARE NOT EQUIPPED WITH AMBER SIDE REFLECTORS FAIL… Remedy: PRO-A MOTORS WILL NOTIFY OWNERS AND OFFER TO REPURCHASE THE LAMPS. THE RECALL BEGAN ON APRIL 3, 2006. OWNERS MAY CONTACT PRO-A MOTORS AT 323-838-2988.

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.

Group 78 battery Vehicles taking 4.5 qt Engine oil filter 19210286 Engine air filter 19259086 Fuel filter 25171792 Spark plug 12681665

Reference guides

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

Vehicle recalls & TSBs OBD-II trouble codes Torque specifications Maintenance schedules Fluid capacities & specs

Frequently asked

How much oil does the 1998 Safari 4WD take?

4.5 qt of 5W-30 API, per the factory manual.

Does the 1998 Safari 4WD have open recalls?

NHTSA lists 5 recall campaign(s) for this model year. Check your specific vehicle by VIN.