ChevroletR20 Suburban1988R20/chevrolet/r20-suburban/1988/r20/

1988 Chevrolet R20 Suburban — R20

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1988 R20 Suburban R20.

Engine R20

Introduced for the 1988 model year, the Chevrolet R20 Suburban is powered by the R20 engine and carries a 6‑quart oil capacity, with recommended viscosities of 20W‑20, 20W‑40 or 20W‑50. Owner feedback records four complaints, concentrating on the engine and cooling systems, and the model endured five recall actions. This Suburban’s reliability profile thus reflects modest complaint volume but notable service interventions in its power‑train.

Model year19881987

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

Full specifications

Engine, drivetrain, dimensions and economy.

Dimensions & weight NHTSA vPIC

Overall length219.3 in
Overall width79.5 in
Overall height74 in
Wheelbase129.5 in
Curb weight5187 lb

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 Capacity27.0 qt
Engine Oil20W-20 · 20W-40 · 20W-50 · 15W-40 · 5W-30
Engine Oil Capacity6 qt
Engine Oil20W-20 · 20W-40 · 20W-50 · 15W-40 · 5W-30
Engine Oil Capacity6 qt
Engine Oil15W-40 · API

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 7,500 mi. The big-interval services (every 7,500 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 miAccessory Drive Belt (inspect) · Brake System (inspect) · Engine Oil Filter (replace) · Parking Brake System (inspect) · Throttle Linkage (inspect)
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) · Engine Coolant System (leak inspection) · Engine Oil (drain & refill)
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) · Fuel Evaporative Emission Control System (inspect)
Every 60,000 miCrankcase Depression Regulator Valve (inspect) · Exhaust Pressure Regulator (inspect) · 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 1988 Chevrolet R20 Suburban dominate in one area — the engine & engine cooling, 2 of 4 reports (50%), well ahead of the next concern. None of this vehicle's 5 recall campaigns target the engine & engine cooling, so those reports read as owner-reported wear-and-tear rather than an acknowledged defect. 1 of the reports describe a crash and 0 a fire — a small share of the total, but worth weighing against the engine & engine cooling 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.

5
Open recalls
NHTSA campaigns
0
Service bulletins
Manufacturer communications
7
ODI investigations
Office of Defects Investigation
4
Owner complaints
1 involved a crash · 0 a fire

Owner complaints filed with NHTSA, by component

All 4 complaints on record, top 3 components.

Engine & Engine Cooling2
Seat Belts1
Structure1

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 5 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.

87V136000Service Brakes, Hydraulic:Foundation Components:Hoses, Lines/Piping, And FittingsReported 01/09/1987

RIGHT AND LEFT HAND BRAKE HOSE MAY CONTACT THE WHEEL OR TIRE IN A FULL TURN. Remedy: INSTALL NEW REPOSITIONING BRACKETS FOR THE FRONT BRAKE HOSES.

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 R20 Suburban. 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 R20 Suburban R20 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 R20 Suburban have open recalls?

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