GMC TruckSonoma 2WD1998Overview/gmc-truck/sonoma-2wd/1998/base/

1998 GMC Truck Sonoma 2WD

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1998 Sonoma 2WD.

Body TRUCK

Identified as a truck within a model history covered from 1990 to 2005, the 1998 GMC Truck Sonoma 2WD requires 4.5 qt of 5W-30 API oil for engine maintenance. This specific year falls within a generation where recorded complaints fluctuated from a low of 1 in 1990 to a high of 306 in 1994, marking a reliability landscape that varied considerably over the production cycle. Researchers evaluating this vehicle should contextualize its performance within this broader span where owner feedback ranged significantly rather than viewing it in isolation.

Model year200219991998

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 torque95 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 75 · 525 CCA battery, OE oil filter 19210286. 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 75 · 525 CCAOEM · verified
Tire sizeP205-75R15OEM · verified
Wheel / rim7-JJ inOEM · verified

OE service part numbers OEM · verified

Engine oil filter19210286 alt 12731175
Engine air filter19259086
Fuel filter25168594
Spark plug12681665 alt 19301812
Front wiper blades15757007 alt 15757008
Serpentine belt12564763 alt 12550110
Thermostat12632948 alt 24577299

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, 80W-90 · GL-5 in the differential. Torque lug nuts to 95 ft-lbs, the oil drain plug to 19.0 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

Differential Gear Oil80W-90 · GL-5
Differential Gear Oil Capacity3.6 qt
Engine Oil5W-30 · API
Engine Oil Capacity4.5 qt
Engine Oil5W-30 · API
Engine Oil Capacity5 qt

Engine torques

Crankshaft Pulley and/or Damper Bolts77 ft-lbs
Crankshaft Pulley and/or Damper Bolts74 ft-lbs
Cylinder Head StepsApply sealant GM P/N 12346004
Intake Manifold to Engine Bolts17 ft-lbs
Exhaust Manifold to Cylinder Head Bolts10 ft-lbs
Intake Manifold to Engine Bolts17.0 ft-lbs
Exhaust Manifold to Cylinder Head Bolts10.0 ft-lbs
Engine Oil Pan Drain Plug19.0 ft-lbs

Chassis torques

Leaf Spring to Axle (U-bolts)89.0 ft-lbs
Leaf Spring to Chassis Bracket89.0 ft-lbs
Leaf Spring to Rear Shackle89.0 ft-lbs
Leaf Spring Rear Shackle to Chassis Bracket89.0 ft-lbs
Lug Nuts95 ft-lbs
Front Wheel Hub103 ft-lbs

Ignition

Cylinder Firing Order1-6-5-4-3-2
Cylinder Firing Order1-3-4-2
Cylinder Firing Order1-6-5-4-3-2
Spark Plug ManufacturerAC Delco
Spark Plug Torque14 ft-lbs
Spark Plug ManufacturerAC Delco
Spark Plug Gap0.045 in
Spark Plug Torque15 ft-lbs

Battery & A/C

RefrigerantR134a
Refrigerant Capacity1.88 lbs
Oil GroupPAG
Oil Type150
Oil Capacity2.2 L
RefrigerantR134a
Refrigerant Capacity1.75-2.00 lbs
Oil GroupPAG

Service checks

Pressure Test20 psi
Radiator Cap Pressure Relief15 psi
Thermostat Opening Temperature188-206 °F
Pressure Test20 psi
Radiator Cap Pressure Relief15 psi
Thermostat Opening Temperature188-206 °F
Pressure Test15 psi
Radiator Cap Pressure Relief15 psi

Brakes

Brake ApplicationWITH FOUR WHEEL DISC / WITH STANDARD
Torque to Knuckle77 ft-lbs / 52 ft-lbs / 38 ft-lbs
Minimum Pad ThicknessFront: 0.030; Rear: 0.030 specification
Brake ApplicationWITH FOUR WHEEL DISC / WITH STANDARD
Rotor Max Parallel Variation0.0003 in / 0.0005 in
Rotor Runout Limit0.003 in / 0.004 in
Rotor Nominal Thickness From1.14 in / 0.787 in / 1.03 in
Rotor Nominal Thickness To1.14 in / 0.787 in / 1.03 in

Multi-step torque procedures OEM · verified

Cylinder Head — tightening sequence 2 stages
1short bolts43 ft. lbs
2turn 90
Cylinder Head — tightening sequence 4 stages
1all bolts22 ft. lbs
2long bolts75 degrees
3medium bolts65 degrees
455
Cylinder Head — tightening sequence 4 stages
1all bolts22 ft. lbs
2long bolts75 degrees
3medium bolts65 degrees
455
Cylinder Head — tightening sequence 1 stages
1short bolts43 ft. lbs
Exhaust Manifold to Cylinder Head Bolts — tightening sequence 1 stages
122.0

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 miAxle 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 miEngine Air Filter Element (replace) · Fuel Filter (replace) · Wheel Bearing (inspect)
Every 50,000 miTransmission Fluid & Filter (replace)
Every 60,000 miAccessory Drive Belt (inspect) · Fuel Line (inspect) · Fuel Tank (inspect) · Fuel Tank Filler Cap (inspect)
Every 100,000 miPCV System (inspect) · Spark Plug Wires (inspect) · Spark Plugs (replace)
At 150,000 miEngine 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.

4
Open recalls
NHTSA campaigns
93
Service bulletins
Manufacturer communications
0
ODI investigations
Office of Defects Investigation
181
Owner complaints
0 involved a crash · 0 a fire
Owner complaints by model year NHTSA · this generation & adjacent

No owner complaints on record with NHTSA for this vehicle.

Recalls NHTSA · verified

No recall campaigns on record with NHTSA for this vehicle as of the last data refresh.

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 Sonoma 2WD. 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 1998 Sonoma 2WD take?

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

Does the 1998 Sonoma 2WD have open recalls?

NHTSA lists 0 recall campaign(s) for this model year. Check your specific vehicle by VIN.