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02 Sonoma V6. Wont shift out of first.

Tiny
ORIGINALTINKERBELL
  • MEMBER
  • 2002 GMC SONOMA
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 92,005 MILES
2002 GMC Sonoma changed fuel pump, fuel filter. Ran for day now wont shift out of first gear. How do I fix this?
Sunday, May 1st, 2011 AT 11:52 PM

3 Replies

Tiny
FACTORYJACK
  • MECHANIC
  • 4,159 POSTS
Is there a check engine light also on? The problem could be as simple as a shift solenoid, or as complex as internal transmission problem. If there is a check engine light, there may be a code that directly relates. Next step would be to function test solenoids, and review scan tool data to determine if a shift is being commanded and just not occurring.
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Monday, May 2nd, 2011 AT 12:03 AM
Tiny
ORIGINALTINKERBELL
  • MEMBER
  • 2 POSTS
Yes, check engine light has come on. What came on before that was abs light and brake light. But they went off. We changed fuel filter 1st. After 16hrs was out driving and the engine shut down. Had to be towed home. Did not hear fuel pump engaging so got a aftermarket one. When dropped fuel tank found a lot of sand in tank. Cleaned tank out and dried. Installed new pump drove for 36hrs and now dont want to shift out of first.(Loosing power) any ideas. Will get codes shortly.
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Monday, May 2nd, 2011 AT 1:12 AM
Tiny
FACTORYJACK
  • MECHANIC
  • 4,159 POSTS
The codes may or may not indicate a direction, but they would be a necessary ingredient.
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Monday, May 2nd, 2011 AT 2:05 AM

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