Total Complaints
26 filings
GMC GMC · model year
26 NHTSA complaints, 5 crash reports for this specific cohort.
NHTSA overall rating
Not crash-tested
New Car Assessment Program
The 1998GMCGMC carries 26 consumer safety complaints in NHTSA's Office of Defects Investigation database for this specific model-year cohort. Within that volume, owners reported 5 crashes, 0 fires, 3 injuries, and 0 fatalities. No NCAP 5-star crash-test rating is available for this model year in the federal database.
Component-level analysis is where model-year complaints become actionable: the top complaint category for the 1998 GMC is service brakes, hydraulic:foundation components:master cylinder with 2 filings, followed by engine and engine cooling:engine (2) and steering:hydraulic power assist system (2). Concentration in one or two component groups is the classic signature of a systemic defect; a flat distribution usually reflects normal aging, warranty complaints, or isolated build-plant variability.
NHTSA currently has 1 investigation file overlapping the 1998 GMC. Owners comparing this cohort against neighboring years should pair the counters above with the complaint-by-year trend on the parent model page — a spike in a single year often tracks to a platform refresh, a new transmission supplier, or an updated ECU calibration. Use the related-complaint feed below to read raw owner narratives before deciding whether any pattern here affects your specific use case.
Total Complaints
26 filings
Crashes Reported
5 reports
Source
NHTSA ODI
Federal complaints database
At or below the fleet median complaint volume.
| Component | Count |
|---|---|
| SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:MASTER CYLINDER | 2 |
| ENGINE AND ENGINE COOLING:ENGINE | 2 |
| STEERING:HYDRAULIC POWER ASSIST SYSTEM | 2 |
| SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP | 2 |
| POWER TRAIN:AUTOMATIC TRANSMISSION | 2 |
| SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS | 2 |
| EXTERIOR LIGHTING:BRAKE LIGHTS:SWITCH | 1 |
| EXTERIOR LIGHTING:TAIL LIGHTS | 1 |
| SEATS | 1 |
| ENGINE AND ENGINE COOLING:COOLING SYSTEM:HOSES/LINES/PIPING/FITTINGS | 1 |
| ENGINE AND ENGINE COOLING:ENGINE:GASOLINE | 1 |
| EXTERIOR LIGHTING:HEADLIGHTS | 1 |
| VISIBILITY:WINDSHIELD | 1 |
| VEHICLE SPEED CONTROL | 1 |
| STEERING:GEAR BOX (OTHER THAN RACK AND PINION) | 1 |
ROAD SENSITIVE STEERING GETS HARDER AND EASIER WHILE DRIVING, CAUSING THE STEERING TO JERK ESPECIALLY WHILE GOING AROUND CURVES. *JB ****DIMSII IVOQ ENTRY POSTED AFTER 12/12/02 CUT-OVER TO ARTEMIS*****742683
Mileage: 41,000
WHILE DRIVING RIGHT REAR TIRE EXPERIENCED TREAD SEPARATION AND BLEWOUT. CONTACTED TECHNICAL ADVISOR, THEY STATED THAT THESE TIRES ONLY HOLD 35LBS OF PRESSURE. THIS VEHICLE NEEDS TIRES THAT CAN HOLD 60LBS OF PRESSURE. WEIGHT OF VEHICLE IS CAUSING TIRES TO OVERHEAT DUE TO UNDER INFLATION. SIZE 2457516, ORGINAL TIRE. PLEASE INCLUDE DOT #.*AKTHE TIRE MODEL IS ALL-TERRAIN. DOT# AP70 HK11028. THE SERVICE DEPARTMENT AT THE DEALER, ATTRIBUTED THE TIRE FAILURE ALSO TO ROAD HAZARDS. THE VEHICLE AS PRESENTED IN VINASSIST IS A GENERAL MOTORS CONVENTIONAL CAB GMT400. *JG
VEHICLE COLLIDED WITH A LARGE AMOUNT OF DIRT AND FLIPPED OVER 3.5 TIMES. THE DRIVER'S SEAT BELT HAD COME LOOSE AND THE CONSUMER WAS THROWN FROM VEHICLE. *AK THE CONSUMER'S SON WAS DRIVING DOWN A GRAVEL ROAD TOO FAST AND LOST CONTROL. (NO LOOSE GARVEL-HAD JUST COME OFF OF A BLACK TOP ROAD 4 MILE BEFORE THE ACCIDENT) THE CONSUMER'S SON HAD SWIRVED BACK TO THE LEFT AND WENT OFF OF THE SIDE OF THE ROAD, HITTING A BAR DITCH HEAD ON AND THEN HAD FLOWN 51 FEET AND ROLLED 3.5 TIMES, IN THE PASSENGER'S DIRECTION, BEFORE RESTING FACE DOWN. HE WAS WEARING A SEAT BELT THAT HAD COME UNLATCHED AND HE WAS THROWN ON THE FIRST ROLL, THE PASSENGER STAYED IN THE PICKUP WHILE THE VEHICLE CONTINUED TO ROLL. (THEY WERE BOTH HOSPITALIZED) *SCC
VEHICLE COLLIDED WITH A MOUND OF DIRT AND FLIPPED OVER 3.5 TIMES. AIRBAGS DID NOT DEPLOY.*AK
WE HAVE TALKED TO MANUFACTURER NUMEROUS TIMES IN THE PAST THREE YEARS ABOUT STEERING PROBLEM ON THESE SCHOOL BUSES, THE POWER STEERING FLUID IS GETTING HOT AND GAULDING STEERING BOXES. OIL TEMPERATURE IS AROUND 220 TO 320 DEGREES, THE MANUFACTURE HAS BEEN REPLACING GEAR BOXES AND SOME GEAR BOXES ARE FAILING THE SECOND TIME.*AK
WE HAVE TALKED TO MANUFACTURER NUMEROUS TIMES IN THE PAST THREE YEARS ABOUT STEERING PROBLEM ON THESE SCHOOL BUSES, THE POWER STEERING FLUID IS GETTING HOT AND GAULDING STEERING BOXES. OIL TEMPERATURE IS AROUND 220 TO 320 DEGREES, THE MANUFACTURE HAS BEEN REPLACING GEAR BOXES AND SOME GEAR BOXES ARE FAILING THE SECOND TIME.*AK
ENGINE ACCELERATES SPONTANEOUSLY WHEN AT IDLE STOPPED. FOOT NOT ON GAS PEDAL
EXPERIENCED INTERMITTENT LOSS OF STEERING CONTROL. WOULD NOTE THE STEERING AS BEING VERY LOOSE OR SOFT, EVEN NONE RESPONSIVE. DRIVER HAD NO CONTROL OF THIS VEHICLE WHILE ENTERING A CURVE AND STRUCK ANOTHER VEHICLE LUCKILY WITHOUT MAJOR DAMAGE SUSTAINED. *AK
BRAKES FAILED, AND PEDAL WENT ALL THE WAY TO THE FLOOR. CONSUMER STATED THAT BRAKES SOUNDED AS THEY WERE LOCKING UP. TOOK VEHICLE TO DEALER, AND DEALER KEPT SAYING THERE WAS NOTHING WRONG WITH THE BRAKES. CONSUMER ALMOST HAD AN ACCIDENT.*AK
LOST CONTROL WHEN BRAKING, HISTORY SHOWS EITHER PULLS LEFT OR RIGHT WHEN BRAKING AND/OR PULSATING. ALIGN SPEC, TO NO AVAIL. HEADLIGHT INOPERATIVE, RIGHT LOWER BEAM LAMP OPEN, REPLACED RIGHT LOW BEAM LAMP. DRIVER WINDOW BINDS WHEN LOWERING, WINDOW LOOSE IN TRACKS, R&R DRIVERS DOOR PANEL, BEND TO ADJUST FT. RUN CHANNEL SECURE WINDOW AND KEEP ALINGED. CHECK FLUID LEAK UNDER FRONT CAMSHAFT SEAL, REPLACED FRONT CRANK SHAFT SEAL, CRANK SENSOR
LOST CONTROL WHEN BRAKING, HISTORY SHOWS EITHER PULLS LEFT OR RIGHT WHEN BRAKING AND/OR PULSATING. ALIGN SPEC, TO NO AVAIL. HEADLIGHT INOPERATIVE, RIGHT LOWER BEAM LAMP OPEN, REPLACED RIGHT LOW BEAM LAMP. DRIVER WINDOW BINDS WHEN LOWERING, WINDOW LOOSE IN TRACKS, R&R DRIVERS DOOR PANEL, BEND TO ADJUST FT. RUN CHANNEL SECURE WINDOW AND KEEP ALINGED. CHECK FLUID LEAK UNDER FRONT CAMSHAFT SEAL, REPLACED FRONT CRANK SHAFT SEAL, CRANK SENSOR
LOST CONTROL WHEN BRAKING, HISTORY SHOWS EITHER PULLS LEFT OR RIGHT WHEN BRAKING AND/OR PULSATING. ALIGN SPEC, TO NO AVAIL. HEADLIGHT INOPERATIVE, RIGHT LOWER BEAM LAMP OPEN, REPLACED RIGHT LOW BEAM LAMP. DRIVER WINDOW BINDS WHEN LOWERING, WINDOW LOOSE IN TRACKS, R&R DRIVERS DOOR PANEL, BEND TO ADJUST FT. RUN CHANNEL SECURE WINDOW AND KEEP ALINGED. CHECK FLUID LEAK UNDER FRONT CAMSHAFT SEAL, REPLACED FRONT CRANK SHAFT SEAL, CRANK SENSOR
LOST CONTROL WHEN BRAKING, HISTORY SHOWS EITHER PULLS LEFT OR RIGHT WHEN BRAKING AND/OR PULSATING. ALIGN SPEC, TO NO AVAIL. HEADLIGHT INOPERATIVE, RIGHT LOWER BEAM LAMP OPEN, REPLACED RIGHT LOW BEAM LAMP. DRIVER WINDOW BINDS WHEN LOWERING, WINDOW LOOSE IN TRACKS, R&R DRIVERS DOOR PANEL, BEND TO ADJUST FT. RUN CHANNEL SECURE WINDOW AND KEEP ALINGED. CHECK FLUID LEAK UNDER FRONT CAMSHAFT SEAL, REPLACED FRONT CRANK SHAFT SEAL, CRANK SENSOR
SHORTLY AFTER SIGNING A LEASE TO PURCHASE THE VEHICLE, THE TRANSMISSION LOCKED UP IN REVERSE WHILE I WAS USING IT COMMERCIALLY. THE TRUCK HAD SEVERAL YEARS, OR 25000 MILES, LEFT ON WARRANTY SO I CALLED GMC CUSTOMER SERVICE FOR REPAIR.THE VEHICLE WAS REPAIRED AT AN AUTHORIZED GMC DEALERS'SHOP, PERFORMANCE CHEVROLET,SACRAMENTO,CA. ONE WEEK LATER THE TRANSMISSION LOCKED UP AGAIN, ONLY THIS TIME I COULDN'T AFFORD TO LOSE THE WORK (SELF-EMPLOYED) AS I DID THE FIRST LOCK UP. SO, I GATHERED MY WITS ABOUT ME AND OPENED THE TOWER/SHIFTER ROD TOP OF THE TRANNY. I FOUND THE BOTTOM OF THE SHIFTER ROD OUT OF ITS DIVIT IN WHICH IT SHIFTS GEARS, AND ALSO SAW THAT THE REVERSE GEAR WAS THROWN INTO REVERSE. I THEN USED A SCREWDRIVER TO PRY THAT GEAR BACK INTO A NUETRAL POSITION. I BUTTONED EVERYTHING BACK INTO PLACE AND RESUMED WORK. THIS BECAME A REGULAR PART OF MY JOBS; THAT IS, "FIXING" THE MANUFACTURER'S PROBLEMED PRODUCT. ABOUT 6 TO 8 MONTHS OF THIS MADDNESS WENT BY, WHEN ONE OF MY CLIENTS COMPLA
NO SUMMARY LISTED FOR ABOVE VEHICLE. *AK
APPLIED BRAKES, GOT A ROARING NOISE, ROTORS AND BRAKE PADS SHOULD BE REPLACED, THE ROARING NOW VIBRATES THE STEERING WHEEL, BRAKE MASTER CYLINDER WENT OUT
THE DEALER IN RED DEER ALBERTA HAS BEEN VERY COOPERATIVE, BUT GMC HAS BEEN SOME WHAT LESS THAN ACCOMODATING. BOTH THE ENGINE AND THE TRANSMISSION WERE REPLACED AT THE SAME TIME. I HAVE TALKED TO SEVERAL INDIVIDUALS AND MECHANICS AND THEY HAVE SAID THAT IT IS VERY UNCOMMON FOR BOTH TO GO AT THE SAME TIME, MORE SO WITH SO FEW MILES ON THE EQUIPMENT. *AK
THE DEALER IN RED DEER ALBERTA HAS BEEN VERY COOPERATIVE, BUT GMC HAS BEEN SOME WHAT LESS THAN ACCOMODATING. BOTH THE ENGINE AND THE TRANSMISSION WERE REPLACED AT THE SAME TIME. I HAVE TALKED TO SEVERAL INDIVIDUALS AND MECHANICS AND THEY HAVE SAID THAT IT IS VERY UNCOMMON FOR BOTH TO GO AT THE SAME TIME, MORE SO WITH SO FEW MILES ON THE EQUIPMENT. *AK
DEALER REPLACED THE ENGINE SEALS AND OIL HOSES, THE BRAKES HAVE NOT FAILED, BUT IF PUT IN A CLOSER SITUATION THAN I WAS ALREADY PLACED AND ACCIDENT WOULD HAVE OCCURRED. I HAVE THE 6.5L DIESEL AND THE BRAKES AND THE POWER STEERING ARE CONNECTED TO THE MASTER CYLINDER. THIS CONNECTION ?? THE STEERING BECOME VERY TIGHT WHEN THE BRAKES WERE APPLIED, EVEN WITH THE TRUCK SITTING STILL. I HAVE TAKEN IT TO THE DEALER THREE TIMES TO GET IT RESOLVED TO NO AVAIL.
DEALER REPLACED THE ENGINE SEALS AND OIL HOSES, THE BRAKES HAVE NOT FAILED, BUT IF PUT IN A CLOSER SITUATION THAN I WAS ALREADY PLACED AND ACCIDENT WOULD HAVE OCCURRED. I HAVE THE 6.5L DIESEL AND THE BRAKES AND THE POWER STEERING ARE CONNECTED TO THE MASTER CYLINDER. THIS CONNECTION ?? THE STEERING BECOME VERY TIGHT WHEN THE BRAKES WERE APPLIED, EVEN WITH THE TRUCK SITTING STILL. I HAVE TAKEN IT TO THE DEALER THREE TIMES TO GET IT RESOLVED TO NO AVAIL.
Data as of 2025. Sources: NHTSA Office of Defects Investigation (ODI) complaints database, NHTSA recall campaign API, NHTSA NCAP crash-test ratings, and NHTSA FARS for fatality cross-reference.
Read our methodology — how this data is sourced, computed, and verified.