GMC TruckSuburban 4WD1988Overview/gmc-truck/suburban-4wd/1988/base/

1988 GMC Truck Suburban 4WD

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1988 Suburban 4WD.

The 1988 GMC Suburban 4WD specifies a six-quart oil capacity with approved viscosities of 20W-20, 20W-40, and 20W-50. Reliability records for this model year show eight total owner complaints, led by seat belt issues, alongside two recalls. Compared against the wider 1990–2004 complaint history where the nameplate peaked at 480 reports in 1994 and fell to just one in 2004, the 1988's eight-complaint total marks it as a low-noise year in the Suburban's long-term record.

Model year19881984

Quick specs

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

Engine oil capacity6 qtOEM · verified
Engine oil type20W-20 / 20W-40 / 20W-50OEM · verified

Fitment & sizes

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

From the factory this vehicle uses OE oil filter 25160561. Note the factory fuel filter is now discontinued — plan on a superseded or quality aftermarket equivalent, which the part pages below list where known.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 filter25160561
Engine air filter08996118 alt 06484235
Fuel filter25171792 discontinued · alt 25011765
Front wiper blades15184702 alt 12363297
Serpentine belt09433719 alt 09433732
Thermostat10207373 alt 14077122

Service quick specs OEM factory data

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

This engine holds 6 qt of 20W-20 / 20W-40 / 20W-50 engine oil, 80W-90 · GL-5 in the differential, DOT 3 brake fluid.

Lubricants & capacities

Brake FluidDOT 3
Differential Gear Oil80W-90 · GL-5
Differential Gear Oil Capacity4.2 qt
Differential Gear Oil80W-90 · GL-5
Differential Gear Oil Capacity14.0 qt
Differential Gear Oil80W-90 · GL-5
Differential Gear Oil Capacity5.5 qt
Differential Gear Oil80W-90 · GL-5

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the engine oil and filter every 5,000 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 5,000 miUniversal Vehicle Operation (inspect idle speed)
Every 5,000 miBrake System (inspect) · Engine Oil (drain & refill) · Engine Oil Filter (replace)
At 7,500 miDrive Axle Assembly (drain & refill) · Engine Oil Filter (replace) · Tire & Wheel Assembly (rotate)
Every 7,500 miBody Latches, Locks & Hinges (inspect) · Brake Line (inspect) · Brake Linings (inspect) · Differential (inspect fluid level) · Exhaust System (Complete) (inspect) · Parking Brake Cable (lubricate)
Every 10,000 miAir Intake System (inspect) · Radiator Fan Assembly (inspect) · Tire & Wheel Assembly (rotate) · Underbody Splash Shield (inspect)
Every 15,000 miCV Joint Boot (inspect) · Driveshaft U-Joint (lubricate) · Engine Oil Filter (replace) · Tire & Wheel Assembly (rotate)
Every 30,000 miClutch Cross Shaft (lubricate) · Clutch Release Lever Pivot Points (lubricate) · EGR System (inspect) · Engine Air Filter Element (replace) · Engine Breather Filter (replace) · Engine Coolant System (drain, flush & refill)
Every 60,000 miAccessory Drive Belt (inspect) · Crankcase Depression Regulator Valve (inspect) · Exhaust Pressure Regulator (inspect) · Fuel Filter (replace) · Fuel Line (inspect) · Fuel Tank (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 1988 GMC Truck Suburban 4WD lead in one area — the seat belts, 2 of 8 reports (25%), well ahead of the next concern. That matters, because the seat belts are also the target of recall 89V-010 on this vehicle — so the single most useful check before buying or servicing one is confirming it was actually performed. 0 of the reports describe a crash and 0 a fire — a small share of the total, but worth weighing against the seat belts 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.

2
Open recalls
NHTSA campaigns
0
Service bulletins
Manufacturer communications
0
ODI investigations
Office of Defects Investigation
8
Owner complaints
0 involved a crash · 0 a fire
Owner complaints by model year NHTSA · this generation & adjacent

Owner complaints filed with NHTSA, by component

All 8 complaints on record, top 7 components.

Seat Belts2
Suspension1
Tires1
Structure1
Equipment1
Engine & Engine Cooling1
Seats1

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 2 campaigns on record for this vehicle.

93V016000Power Train:Automatic TransmissionReported 01/02/1993

UNANTICIPATED HEAT IN THE TRANSMISSION CAN FORCE THE TRANSMISSION FLUID OUT OF THE VENT TUBE. Remedy: INSTALL A LONGER TRANSMISSION VENT HOSE ROUTED TO THE LEFT SIDE OF THE ENGINE COMPARTMENT OF THE VEHICLE.

89V010000Seat Belts:Front:WebbingReported 30/01/1989

DRIVERS SEAT AND/OR SHOULDER BELT LOCKING MECHANISM MAY NOT OPERATE. Remedy: INSTALL A NEW DRIVERS SEAT BELT ASSEMBLY.

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 Suburban 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 1988 Suburban 4WD take?

6 qt of ABOVE 40 degrees F 30, ABOVE 20 degrees F: 20W-20, 20W-40, 20W-50, ABOVE 10 degrees F: 15W-40, BELOW 60 degrees F: 5W-30, per the factory manual.

Does the 1988 Suburban 4WD have open recalls?

NHTSA lists 2 recall campaign(s) for this model year. Check your specific vehicle by VIN.