I have a 2004 Pontiac gran prix after 15 minutes of drivin my service brake light comes on the trans starts to kick in and out of overdrive then I lose all gauges except my speedo. HELP!!!

Asked by Apr 01, 2014 at 09:10 PM about the 2004 Pontiac Grand Prix GT1

Question type: Maintenance & Repair

1 Answer

4,415

Need the OBD code to even begin to know what's going on. Bad sensor, ECM, maybe the engine is being put into 'limp home' mode by any number of failing sensors. PepBoys or Autozone will read the code for you for free, that's the first step.

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