2003 Grand Prix with 3100 engine, will not shift into overdrive. What is the problem?

2003 PONTIAC GRAND PRIX
131,000 MILES
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WHEELDOG45
  • MEMBER
  • 1 POST
Winds up to 3000 rpm's at 70 mph.
Feb 19, 2012 at 1:43 PM
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RIVERMIKERAT
  • ✓Experienced Mechanic
  • 6,106 POSTS
Have it scanned for codes. Check shifter adjustment. Check fluid level and condition. Check transmission fluid pressure.
Feb 19, 2012 at 1:46 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Do you have a check engine light?

Transmission fluid level and condition okay-If so bring it in and have it further checked by a transmission specialist-
Feb 19, 2012 at 1:49 PM
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