k1500 gmc wiring

  1. G

    fuel pump relay ground and power

    1997 GMC Yukon 5.7 vortec 4X4 This started 10 minutes or so after I left a car wash, it didn't spit or sputter just died on the road. After a fair bit of diag and changing the pump i discovered that pin 87 ( should just be constant power ) is also a ground to the body. I don't know how this is...
  2. A

    Odd issue with a 1994 GMC K1500

    Hello, This is my first post here, but this is my fifth GMT400 vehicle that I have owned, I have this (a 1994 GMC K1500) and another (a 1993 Chevrolet K1500), both are extended cab long beds with the 5.7L V-8 and the 4L60E transmission. Anyhow, I started having an intermittent issue with the...
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