AI Damage2018 GMC Sierra Denali: common problems
The maker issued 592 service bulletins for this year. Details by component below, with sources.
Key figures
- Technical service bulletins (TSB)
- 592
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Equipment | 0 | 0 | 211 |
| Engine and cooling | 0 | 0 | 124 |
| Electrical system | 0 | 0 | 89 |
| Powertrain | 0 | 0 | 71 |
| Engine | 0 | 0 | 69 |
| Fuel system | 0 | 0 | 58 |
| Wheels | 0 | 0 | 35 |
| Structure | 0 | 0 | 25 |
| Tires | 0 | 0 | 16 |
| Suspension | 0 | 0 | 15 |
| Service brakes | 0 | 0 | 13 |
| Steering | 0 | 0 | 12 |
| Visibility | 0 | 0 | 9 |
| Exterior lighting | 0 | 0 | 8 |
Comparison
What to check before buying
- Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
- Engine. Cold start, unusual noises, oil leaks and engine codes.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it
- This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance
- PI to help diagnose A/C concern
- This preliminary information communicates information about how to determine if a wheel and tires size…
- This Preliminary information communicates the steps on how to save a GDS2 Session Log and upload to a…
This Preliminary information communicates the steps on how to save a GDS2 Session Log and upload to a Technical Assistance Case in CX Connect.
- This service bulletin provides information on Tire Sidewall Irregularities
- This service bulletin provides information on replacing the intake manifold when the engine is replaced…
This service bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage.
- This Preliminary Information communication provides information to the technician about vehicles that have…
This Preliminary Information communication provides information to the technician about vehicles that have had multiple repair attempts that are being performed on customer’s vehicles that exhibit vibration conditions…
- The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle…
The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle response when the throttle plate is opened rapidly and advises the customer that it is normal for the delay.
- New Vehicle Monitoring Programs Section in IVH
- This Preliminary Information communication provides information to the technician about vehicles that have…
This Preliminary Information communication provides information to the technician about vehicles that have an intermittent no crank, no start, or start stall concern with the security light coming on. Technician may…
- This service bulletin provides information to dealership personnel for new vehicles with less than 1,000…
This service bulletin provides information to dealership personnel for new vehicles with less than 1,000 miles that may not pass California smog inspection or smog inspection in other states.
NHTSA lists 592 bulletins for this year; the 12 newest are shown here.
Other years of this model
Questions and answers
What are the most common problems with the 2018 GMC Sierra Denali?
There are no owner complaints in the NHTSA data for this year; the data comes from 592 manufacturer service bulletins.
How many service bulletins (TSB) were issued for the 2018 GMC Sierra Denali?
NHTSA lists 592 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 2018 GMC Sierra Denali 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 2018 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 2026-11-04.