1990 GMC Sierra VSS signal buffer

1990 GMC SIERRA

250,000 MILES • V8 • 2WD • AUTOMATIC

ERSF

MEMBER
1 POST

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.

Mar 12, 2008 at 11:41 AM

2CARPRO JACK

✓Experienced 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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Mar 13, 2008 at 8:24 AM

LOLAANDLIZZIE

MEMBER
2 POSTS

[quote:01a7e0d810="ERSF"]Computer problem
1990 GMC Sierra V8 Two Wheel Drive Automatic 250000 miles
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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.[/quote:01a7e0d810]

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.

Oct 21, 2008 at 11:39 PM

Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.