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severe Owners of the 2006 GMC Sierra have filed 9 NHTSA complaints about the engine, typically surfacing around 30,000 miles at roughly $3,100 to repair (U.S. federal records, as of August 2026). Source: NHTSA Office of Defects Investigation. See engine across all vehicles →
| Model year | engine complaints |
|---|---|
| 2005 Sierra | 44 |
| 2006 Sierra (this page) | 9 |
| 2007 Sierra | 25 |
| 2008 Sierra | 14 |
| 2009 Sierra | 13 |
| 2010 Sierra | 14 |
Of the 9 engine complaints filed for the 2006 GMC Sierra, here's the actual mileage breakdown — failures cluster heaviest at 0-25,000 mi.
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
No new NHTSA engine complaint has been filed on this vehicle in over 19 years — the issue may be aging out of the active population.
If the damper comes loose, a fuel leak may result. Fuel leakage, in the presence of an ignition source, could result in a fire.
The manufacturer has issued service bulletins covering engine on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
This informational bulletin provides information on close coupled converters and there affect on newly installed engines or engines during there break in period.
full bulletin at NHTSA ↗This informational bulletin provides information to technicians regarding intake manifold inspection/replacement after severe internal engine damage.
full bulletin at NHTSA ↗This technical bulletin provides repair information for repairing the IP to body harness connector to correct a customer concern for intermittent Malfunction Indicator Lamp (MIL) illuminated with Reduced Engine Power displayed and DTC P2138 set.
full bulletin at NHTSA ↗GENERAL MOTORS: INTERMITTENT MIL/SES/ DTC P2138 WITH REDUCED ENGINE POWER (REPAIR INSTRUMENT PANEL (IP) TO BODY HARNESS CONNECTOR). 2005-08 GM PASSENGERS CARS/LIGHT DUTY TRUCKS (INCL. SATURNS). UPDATED 11/5/10. UPDATED 4/4/11. UPDATED 2/3/16.
full bulletin at NHTSA ↗This informational bulletin provides information to technicians regarding intake manifold inspection/replacement after severe internal engine damage.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
4.3 engine started shaking for not apparent reason, mileage at incident 10,000 miles. Engine RPM's would go up & down at idle & rough idle it did this for a couple of days. Engine shook violently and jerked. The vehicle stopped running would not turn on. Vehicle towed to dealer. Dealer had to replace ECM (computer) & crank shaft sensor. Vehicle after two weeks is now rough idle at times at…
It's a meaningful issue. 9 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $3,100.
Across the 8 complaints that reported odometer mileage, most engine failures cluster between 10,000 and 143,000 miles, with the median around 30,000. A quarter of owners report trouble before 10,000; a quarter make it past 143,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
Independent shops typically charge around $3,100 for engine repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Yes — 1 active recall(s) cover engine issues on this vehicle. Recall fixes are always free regardless of mileage or warranty status. Use the VIN decoder at the top of the page to check if your specific vehicle is affected.