1999 GMC Savana G 1500 passenger van

Asked by Carla May 20, 2015 at 12:46 AM about the 1999 GMC Savana G1500 Passenger Van

Question type: Maintenance & Repair

put 3 transmissions in and still getting P1840 code. Changed valve body and sensors.
Using dexron 6 transmision fluid

2 Answers
1,565

Tooloose answered 9 years ago

P1840 - Transmission Transfer Case Shift Motor Short Circuit To Battery Read more: http://engine-codes.com/p1840.html#ixzz3ae07ZuDs

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1,565

Tooloose answered 9 years ago

Check for possible pinched wiring causing short/ also ohm read transfer case shift moter resistance. That value can be obtained by anyone who has transmission diagnostic software.

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