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1990 GMC Sierra VSS signal buffer

Tiny
ERSF
  • MEMBER
  • 1990 GMC SIERRA
  • V8
  • 2WD
  • AUTOMATIC
  • 250,000 MILES
Hi folks, Great website, My problem is : I need to lknow where the VSS signal buffer is.

According to the book it supposed to be at the right side of instrument cluster. I have even look at the passenger side of dashboard to no avail. I know where the ECM is. But the VSS signal buffer. Is it integrated into the ECM? Please help!

Thanks in advance for your prompt response, I have donated. Receipt ID 3681-9044-1703-6350.
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Wednesday, March 12th, 2008 AT 6:41 PM

2 Replies

Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
Looks like The Vehicle Speed Sensor Input Buffer is located in the Instrument Cluster on the Circuit Board.

See the diagram below for location
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Thursday, March 13th, 2008 AT 3:24 PM
Tiny
LOLAANDLIZZIE
  • MEMBER
  • 2 POSTS
The VSS buffer is just to the left side of the glove box. Remove the glove box and look to your left inside. It is a small white box that might be velcroed to the back side of the dash.
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Wednesday, October 22nd, 2008 AT 6:39 AM

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