1998 GMC Sonoma
Vehicle Specs & Maintenance Data
The 1998 GMC Sonoma maintenance specs on this page cover the key fluids, torque values, and wear items you need for routine service. Use these numbers as a quick reference when performing oil changes, tire rotations, brake jobs, and other scheduled maintenance on your GMC Sonoma.
For oil changes, the 1998 GMC Sonoma takes 5W-30 motor oil with a capacity of 4.5 quarts. Brake fluid type is DOT 3, the recommended coolant is Dex-Cool (OAT), and transmission fluid is Dexron VI. Always use the manufacturer-recommended fluids to maintain warranty coverage and engine longevity.
When mounting wheels on the GMC Sonoma, torque the lug nuts to 100 ft-lbs using a calibrated torque wrench. Over- or under-torquing can lead to warped brake rotors or loose wheels. Re-torque after 50 to 100 miles on newly installed wheels.
There are 4 NHTSA safety recalls on file for the 1998 GMC Sonoma. Check the Recalls tab below for full details.
Specifications on this page are compiled from multiple publicly available sources including manufacturer documentation, NHTSA data, and automotive databases. Always cross-reference with your owner's manual or official factory documentation before purchasing parts or performing any service.
The 1998 GMC Sonoma uses 5W-30 motor oil (4.5 qt capacity), requires lug nuts torqued to 100 ft-lbs, takes DOT 3 brake fluid.
Enter a diagnostic trouble code to see causes, symptoms, and fixes for the 1998 GMC Sonoma.
No known problems reported for this vehicle yet.
4 NHTSA safety recalls for the 1998 GMC Sonoma. Check your VIN at NHTSA.gov
FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES
CERTAIN DELPHI FUEL PRESSURE REGULATORS, P/NOS. FP10020-11B1, FP10026-11B1, AND FP10027-11B1, SOLD AFTER JANUARY 9, 2007, AS AFTERMARKET EQUIPMENT FOR VARIOUS PASSENGER VEHICLES LISTED ABOVE. THE UNIVERSAL PRESSURE REGULATORS (UPR) WERE PRODUCED WITHOUT AN O'RING AND RETAINER.
FUEL MAY LEAK, POSSIBLY RESULTING IN A FIRE.
DELPHI WILL NOTIFY OWNERS AND REPLACE THE UPR FREE OF CHARGE. THE RECALL BEGAN ON APRIL 23, 2007. OWNERS CAN CONTACT DELPHI AT 877-411-8770.
EXTERIOR LIGHTING
VEHICLE DESCRIPTION: LIGHT DUTY PICKUP TRUCKS AND SPORT UTILITY VEHICLES. THESE VEHICLES FAIL TO COMPLY WITH THE REQUIREMENTS OF FMVSS NO. 108, "LAMPS, REFLECTIVE DEVICES, AND ASSOCIATED EQUIPMENT." THE DAYTIME RUNNING LIGHTS BUILT WITH A CANDELA VALUE GREATER THAN 3,000 CANNOT BE MOUNTED HIGHER THAN 864MM ABOVE THE ROAD SURFACE.
THESE VEHICLES DO NOT COMPLY WITH REQUIREMENTS OF FMVSS NO. 108.
DEALERS WILL INSTALL A REVISED WIRING HARNESS THAT CHANGES THE DRL'S FROM HIGH BEAM TO LOW BEAM DRL'S, AND INSTALL NEW LONG-LIFE LOW BEAM BULBS.
ELECTRICAL SYSTEM:WIRING:FRONT UNDERHOOD
VEHICLE DESCRIPTION: LIGHT DUTY PICKUP TRUCKS AND MULTI-PURPOSE VEHICLES. AN ENGINE ELECTRICAL WIRING-HARNESS CLIP CAN MELT AND DRIP ONTO THE EXHAUST MANIFOLD.
THE CLIP MATERIAL ON THE EXHAUST MANIFOLD CAN IGNITE AND SUBSEQUENTLY IGNITE OTHER COMBUSTIBLE COMPONENTS RESULTING IN A VEHICLE FIRE.
DEALERS ARE CONTACTING OWNERS BY TELEPHONE TO HAVE THEIR VEHICLES TOWED TO THE DEALER AND ALTERNATE TRANSPORTATION PROVIDED TO THEM UNTIL THE DEALER CAN REROUTE THE ELECTRICAL WIRING-HARNESS.
SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:HOSES, LINES/PIPING, AND FITTINGS
VEHICLE DESCRIPTION: LIGHT DUTY PICKUP TRUCKS AND MULTI-PURPOSE PASSENGER VEHICLES. A FATIGUE FRACTURE OF THE REAR AXLE RIGHT-HAND BRAKE PIPE CAN OCCUR CAUSING A SLOW BRAKE FLUID LEAK RESULTING IN A SOFT BRAKE PEDAL. IF THE BRAKE PIPE BREAKS, THE DRIVER WOULD EXPERIENCE A SUDDEN DROP IN THE BRAKE PEDAL, THE INSTRUMENT PANEL BRAKE LIGHT WOULD ILLUMINATE, AND THERE WOULD BE A LOSS OF REAR BRAKE PERFORMANCE.
PARTIAL LOSS OF BRAKING AT A TIME WHEN MINIMUM STOPPING DISTANCE WAS REQUIRED COULD RESULT IN A VEHICLE CRASH.
DEALERS WILL INSPECT AND REPLACE THE BRAKE PIPE.