AI DamageGMC Syclone: problems, complaints, bulletins
Summary for the GMC Syclone across 1 model years: 6 owner complaints and 0 NHTSA service bulletins, plus repair videos. Pick a year for details.
Model years
| Year | Owner complaints | involving a crash | Technical service bulletins (TSB) | YouTube repair videos |
|---|---|---|---|---|
| 1991 | 6 | 2 | 0 | 0 |
What fails most often
- 1 Service brakes 83% of all complaints
- 2 Powertrain 33% of all complaints
- 3 Engine and cooling 17% of all complaints
- Service brakes: 5 complaints (83% of all), 2 of them with a crash reported by the owner.
- Powertrain: 2 complaints (33% of all).
- Engine and cooling: 1 complaints (17% of all).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Service brakes | 5 | 2 | 0 |
| Powertrain | 2 | 0 | 0 |
| Engine and cooling | 1 | 0 | 0 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
Consumer went to apply brakes, and brakes failed and pedal went to the floor. Dented the bumper, and cracked the grill. Didn't contact dealer.
Failed to stop and crashed into rear of vehicle in front of me
Front shaft from transfer case to differential failed, replaced under factory warranty, abs brake master unit failed at 52,550 miles outside the extended warranty by 6 months dealer refused to repair under warranty, wanted $1200+ in parts plus labor to repair, cannot afford to repair at this time.
Purchase the truck 18 month used truck been in the shop 8 months on the transmission twice and turbo charger been replace three time. Tt
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
What to check before buying
- Service brakes. Pedal feel, ABS operation, leaks, discs and hoses.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
- Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
Other models of this make
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-05.