1999 GMC Sonoma problems & reliability
57 owner complaints filed with NHTSA for the 1999 GMC Sonoma. Last verified Aug 7, 2026. Complaints are unverified reports submitted by owners to the federal Office of Defects Investigation.
Each complaint is counted once (by NHTSA case number), even when it names several vehicles.
5 complaints report injuries (5 injured).
Federal crash records (FARS 2020–2023): 1999 GMC Sonoma vehicles were involved in 16 fatal crashes with 15 occupant deaths. Involvement counts are not adjusted for how many are on the road and do not imply fault or a vehicle defect.
Most reported problems
| Component | Complaints | Share |
|---|---|---|
| Power Train | 8 | 14% |
| Seats | 8 | 14% |
| Structure | 8 | 14% |
| Service Brakes, Hydraulic | 7 | 12% |
| Air Bags | 6 | 11% |
| Electrical System | 4 | 7% |
| Engine and Engine Cooling | 4 | 7% |
| Fuel System, Gasoline | 3 | 5% |
| Seat Belts | 3 | 5% |
| Steering | 3 | 5% |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.
Mileage when problems occurred
Half of the failures with a reported odometer reading occurred by 57,000 miles (middle 50% between 44,425 and 100,000 miles), based on 24 complaints that included mileage.
Complaints by incident year
What owners report
“Tl* the contact owned a 1999 gmc sonoma. While driving 5 mph on a flooded dirt road, the contact crashed into a ditch. After the crash, the vehicle came to a complete stop. The air bag deployment was delayed. The contact sustained a cracked pelvis, broken facial bones, optic nerve damage, and other severe injuries to…”
Air Bags · filed Dec 28, 2017
“During a panic stop the brake system light came on and the brakes felt soft but still worked. During the drive the brakes became very weak. When I checked the brake fluid it was empty. I refilled it and started checking for leaks. I found that both the front and rear brake lines we fractured because of the pressure…”
Service Brakes · filed Dec 13, 2017
“Tl* the contact owns a 1999 gmc sonoma. The contact stated that the air bag warning indicator illuminated while driving over unleveled land. The contact was unable to determine the origin of the failure. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The approximate failure…”
Air Bags · filed Jul 10, 2015
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Technical service bulletins
95 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 1999 GMC Sonoma. The 10 most recent:
This Preliminary Information communication provides information to the technician about vehicles that may have slack in one of the tailgate cables. Technician should not replace any parts for this concern. Please…
PIT3227S · Service Bulletin/Repair Instructions · issued May 9, 2023
This warranty administration bulletin provides information regarding the field action courtesy transportation policy.
17-NA-073 · Service Bulletin/Repair Instructions · issued Feb 21, 2023
This Preliminary Information communication provides information to the technician about vehicles that may have slack in one of the tailgate cables. Technician should not replace any parts for this concern. Please…
PIT3227R · Service Bulletin/Repair Instructions · issued Apr 13, 2022
This Preliminary Information communicates to the dealer the process for downloading or updating operating software for the Tire Pressure Monitor, Active Fuel Injector tester, multi media tester, PICO Scope, GR8…
PIP4723F · Service Bulletin/Repair Instructions · issued Jan 14, 2022
This Preliminary Information communication provides information to the technician about vehicles that may have slack in one of the tailgate cables. Technician should not replace any parts for this concern. Please…
PIT3227Q · Service Bulletin/Repair Instructions · issued Apr 1, 2021
This Preliminary Information communicates to the dealer the process for downloading or updating operating software for the Tire Pressure Monitor, Active Fuel Injector tester, multi media tester, PICO Scope, GR8…
PIP4723D · Service Bulletin/Repair Instructions · issued Jan 31, 2020
This Preliminary Information communication provides information to the technician on how to unlock radios that are Delco TheftLock. Technician will use the radio to get the scrambled code. Technician will need to…
PIC4696E · Service Bulletin/Repair Instructions · issued Nov 22, 2019
This warranty administration bulletin provides information regarding the field action courtesy transportation policy.
17NA073 · Service Bulletin/Repair Instructions · issued Sep 18, 2019
This Preliminary Information communication provides information to the technician on how to unlock radios that are Delco TheftLock. Technician will use the radio to get the scrambled code. Technician will need to…
PIC4696D · Service Bulletin/Repair Instructions · issued Sep 5, 2019
This warranty administration bulletin provides information regarding the field action courtesy transportation policy.
17NA073 · Service Bulletin/Repair Instructions · issued Feb 15, 2019
TSBs are repair guidance manufacturers send to dealers — they are not recalls and repairs are not automatically free. Full documents are available on NHTSA’s site.
Safety recalls
No NHTSA recall campaigns name the 1999 GMC Sonoma in our current data. Recalls may apply only to certain VIN ranges — always confirm with a VIN check.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →Buying a used 1999 GMC Sonoma?
- · Decode the seller’s VIN with our free VIN decoder to confirm the exact year, engine and trim.
- · Check for unrepaired recalls by VIN on NHTSA’s official lookup — recall repairs are free.
- · Owners most often reported problems around 57,000 miles — budget accordingly if the car is approaching that mileage.