6.7

fairly significant
Typical Repair Cost:
No data
Average Mileage:
50,650 miles
Total Complaints:
3 complaints

Most common solutions:

  1. not sure (1 reports)
  2. replace transmission lines (1 reports)
  3. replaced hose cylinder (1 reports)
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This problem may be covered under warranty. Ask your Pontiac dealer.

problem #3

Feb 162021

Grand Prix 3.8L

  • Automatic transmission
  • 105,000 miles

Engine light on - I'm not sure what the problem is. I had it put on computer but no error codes. Car is starting to jerk while driving. It's startling to not go while put in drive but there are no error codes.

- D R., San Antonio, TX, US

problem #2

Mar 072009

Grand Prix Limited Edition Supercharged V6

  • Automatic transmission
  • 23,424 miles

I ALWAYS GET SCARED WHEN THE ENGINE LIGHT COMES ON...I KNEW SOMETHING WASN'T RIGHT. ENGINE RUNNING HOT . 1 QUART ANTI-FREEZE LOW. NOTHING BUT PROBLEMS ON AND ON AND ON. REPLACED CYLINDER CASE VENTILATION HOSE F-TUBE. STORED AIR TUBE MISSING ON AIR INLET.

- jewelcase11, Montpelier, VT, US

problem #1

Mar 292007

Grand Prix Limited Edition Supercharged V6

  • Automatic transmission
  • 23,424 miles

DEALERSHIP REPLACED BOTH UPPER AND LOWER TRANSMISSION LINES TO CORRECT AS FLUID WAS LEAKING ALL OVER THE PLACE. STARTING TO HAVE NIGHTMARES.

- jewelcase11, Montpelier, VT, US