I HAVE A 2006 GRAND PRIX GXP WITH 118K MILES ON IT AND THE TRANSMISSION HAS FAILED AND NEED REBUILDING THE DEALER SHIP TOLD ME TO MAKE A REPORT BECAUSE THIS IS A ONGOING DEFECT. *TR
2006 Pontiac Grand Prix powertrain problems
moderate 57 complaints filed with NHTSA · avg repair $2,500
Complaints
57
Recalls
0
Crashes
1
Avg fix
$2,500
What owners are reporting 4 most recent
4T65E-HD AUTOMATIC TRANSMISSION FAILURE. CAR DOES NOT ENGAGE ANY GEAR TO INCLUDE REVERSE. ACCORDING TO GENERAL MOTORS, THIS TRANSMISSION IS RATED TO HANDLE 280 POUND FEET OF TORQUE. HOWEVER, IT WAS MOUNTED IN A VEHICLE (2006 GRAND PRIX GXP) WHICH BY GENERAL MOTORS' OWN ADMISSION MAKES 323 POUND FEET OF TORQUE. THEREFORE, BY GENERAL MOTORS' OWN ADMISSION, THE TRANSMISSION THEY SELECTED FOR THIS…
THE TRANSMISSION IS CONSTANTLY SLIPPING IN AND OUT OF OVERDRIVE. IT IS STILL DOING THIS AFTER A 2ND TRANSMISSION FLUSH. THE FIRST WAS DONE BEFORE 50K MILES. THEN SECOND WAS DONE RECENTLY. THIS IS STILL AN ISSUES. BOTH TIMES THERE WERE NO METAL SHAVINGS FOUND DURING THE CHANGE. *TR
WHILE DRIVING MY CAR ON STREET I WAS STRUCK ON THE PASSENGER SIDE IN A INTERSECTION WHEN A CHEVY MAXI VAN STRUCT ME WHEN RUNNING A RED LIGHT. MY AIRBAG DID NOT DEPLOY AND MY VEHICLE WAS TOTALLED. I SUSTAINED BODY INJURIES SUCH AS BACK AND NECK AND FINANCIAL HARDSHIP. I HAVE NEVER RECOVERED FROM THESE INJURIES.
Common questions
How serious is the powertrain problem on the 2006 Pontiac Grand Prix?
It's a documented issue but not catastrophic. 57 complaints have been filed. Repairs average $2,500 and most owners catch it before it causes a breakdown.
At what mileage does the powertrain typically fail?
Mileage data is limited for this issue. Owners report failures across a wide range, suggesting cause is more about driving conditions and maintenance than mileage alone.
What does it cost to fix?
Independent shops typically charge around $2,500 for powertrain 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.
Are there any recalls related to powertrain?
No active recalls currently cover powertrain issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Other problem areas on this vehicle
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Severity ratings are derived from reported crashes, fires, injuries, and fatalities.
Repair cost estimates are independent-shop national averages and may differ in your area.
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