AI Damage1991 GMC Syclone: common problems
Owners of the 1991 GMC Syclone filed 6 complaints with NHTSA, most often about service brakes and powertrain. Details by component below, with sources.
Key figures
- Owner complaints
- 6
- involving a crash
- 2
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.
Comparison
By complaint count this model year ranks 13,278 of 36,656 model years in the NHTSA data (top 36% most complained about).
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.
Questions and answers
What are the most common problems with the 1991 GMC Syclone?
Owner complaints to NHTSA most often mention: service brakes, powertrain, engine and cooling. Total complaints: 6. The most frequent symptoms in complaint texts: brake failure (17%).
How many service bulletins (TSB) were issued for the 1991 GMC Syclone?
NHTSA lists 0 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 1991 GMC Syclone from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 1991 models
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.