2007 Malibu 3.5 - speedometer does not work & tranny shifts rough after head gasket job

2007 CHEVROLET MALIBU
84,368 MILES
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ABOMAXX
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After doing a complete head gasket job on my '07 Malibu, the speedometer does not work and the transmission shifts rough. Is this a PCM problem or something got disconnected? The engine runs well. Is this something that I can troubleshoot at home?
Jul 25, 2013 at 3:51 PM
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JACOBANDNICKOLAS
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It sounds like the vehicle speed sensor (VSS) was disconnected or damaged. Check that. Also, if the check engine light is on, have the computer scanned for possible transmission trouble codes.
Jul 25, 2013 at 9:20 PM
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ABOMAXX
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Thanks! Your diagnostic was 100% correct. The speed sensor was disconnected and I hooked it back up first thing today. She is now shifting smooth and the speedometer is fully operational.
Jul 26, 2013 at 12:59 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Glad I helped. Take care and let us know if you have questions in the future.

Joe
Jul 26, 2013 at 6:45 PM
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