NHTSA lists 4 safety recalls and 172 owner complaints for the 1998 GMC Sonoma. Most complaints involve visibility (56) and seats (30). The EPA rates it 16–22 mpg combined.
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.
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.
VEHICLE DESCRIPTION: LIGHT DUTY PICKUP TRUCKS AND MULTI-PURPOSE VEHICLES. AN ENGINE ELECTRICAL WIRING-HARNESS CLIP CAN MELT AND DRIP ONTO THE EXHAUST MANIFOLD.
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.
“TL* THE CONTACT OWNS A 1998 GMC SONOMA. THE CONTACT STATED THAT THE WINDSHIELD WIPERS WOULD STOP WORKING SPORADICALLY. THE VEHICLE WAS NOT TAKEN TO THE DEALER. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE BUT DID NOT OFFER ANY ASSISTANCE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 50,000 AND THE CURRENT MILEAGE WAS 60,000. ..UPDATED 09/15/11 *BF THE WINDSHIELD WIPERS PERIODICALLY STOPPED WORKING IN THE RAIN. UPDATED 09/28/11*JB”
“PASSENGER SEAT DOES NOT LOCK INTO PLACE. PASSENGERS SEAT SLIDE FORWARD AND BACKWARD , AND AIR BAG LIGHT STAYED ON , LEFT TURN SIGNAL LIGHT AND BRAKE DON'T COME ON. *TR”
“IN APRIL 2006, A BRAKE LINE ON MY 1998 GMC SONOMA PICKUP BROKE WHEN I APPLIED THE BRAKES AT APPROX 50 MPH. I HAD TO STOP RATHER QUICKLY DUE TO TRAFFIC BACKING UP ON AN INTERSTATE HIGHWAY. WHEN THE BRAKE LINE BURST, MY BRAKE PEDAL WENT TO THE FLOOR AND I HAD NO BRAKES. PRIOR TO THIS HAPPENING, THE BRAKES WERE WORKING FINE. FORTUNATELY, I WAS ABLE TO SWERVE INTO ANOTHER LANE AND DOWNSHIFT (STD SHIFT) TO AVOID AN ACCIDENT. MY MECHANIC REPLACED THE BROKEN LINE (FROM HYDRAULIC ABS TO JUNCTION) AND ALSO THE REAR BRAKE PADS AND ROTORS. THE TRUCK HAD 107,000 MILES ON IT WHEN THIS OCCURRED. I DECIDED TO REPORT THIS BECAUSE I AM CONCERNED THAT IT MIGHT HAPPEN TO OTHERS, RESULTING IN A SERIOUS ACCIDENT.*JB”
Towing, payload and dimensions aren’t in the EPA or NHTSA data, so we don’t list them.
| Version | City | Hwy | Comb. | Fuel / yr | CO₂ g/mi |
|---|---|---|---|---|---|
| Sonoma 2WD Man 5-spd, 4 cyl, 2.2 L · Rear-Wheel Drive | 20 | 26 | 22 | $2,900 | 404 |
| Sonoma 2WD Auto 4-spd, 4 cyl, 2.2 L · Rear-Wheel Drive | 17 | 24 | 19 | $3,400 | 468 |
| Sonoma 2WD Man 5-spd, 6 cyl, 4.3 L · Rear-Wheel Drive | 16 | 21 | 18 | $3,550 | 494 |
| Sonoma 2WD Auto 4-spd, 6 cyl, 4.3 L · Rear-Wheel Drive | 15 | 20 | 17 | $3,800 | 523 |
| Sonoma 4WD Man 5-spd, 6 cyl, 4.3 L · 4-Wheel or All-Wheel Drive | 15 | 20 | 17 | $3,800 | 523 |
| Sonoma 4WD Auto 4-spd, 6 cyl, 4.3 L · 4-Wheel or All-Wheel Drive | 14 | 19 | 16 | $4,000 | 555 |
| Item | Miles | Time | Note |
|---|---|---|---|
| Engine oil & filter | 5,000–10,000 mi | 6–12 months | Follow the oil-life monitor if fitted |
| Tire rotation | 5,000–7,500 mi | Every oil change | Check pressure monthly |
| Engine air filter | 15,000–30,000 mi | 1–2 years | Sooner in dusty areas |
| Cabin air filter | 15,000–25,000 mi | 1–2 years | |
| Brake fluid | — | 2–3 years | Absorbs moisture over time |
| Coolant | 60,000–100,000 mi | 5–10 years | Long-life coolants last longer |
| Spark plugs | 60,000–100,000 mi | — | Iridium/platinum plugs at the long end |
| 12V battery | — | 3–5 years | Heat shortens battery life |
4 safety recalls as of Oct 30, 2026, according to NHTSA. Recall repairs are free at a dealer. Check your VIN to see whether your car is included and whether the repair was done.
Owners filed 172 complaints with NHTSA. The most-cited components are visibility (56), seats (30), service brakes, hydraulic (20). Complaints are unverified owner reports and aren't adjusted for how many cars were sold.
The EPA rates the 1998 GMC Sonoma at 16–22 mpg combined, depending on engine and drivetrain (6 versions rated).