Part Identification

[ree.eric]

I am trying to identify this part from under or behind the dash. This will also be my first attempt to embed a picture. The preview worked! The part
takes a bulb on the side you can't see.

http://www.gmcmhphotos.com/photos/data/2/medium/gmc_dash_part.jpg
--
Eric & Ree '74 ex-Sequoia (parts) '75 Eleganza (TB, exhaust x-over blocking plates, Manny reaction arms and discs, 3"exhaust rear muffler, aux vacuum,
fuel tank sealing, rebuilt senders and new rubber, propane hot water heater.) Alexandria, Ontario, Canada

 

[bob heller]

That's the electronics for the low fuel light.

One of the failure modes of this part is your gas gauge will read almost full all the time on both tanks. Unplug this module and the gas gauge works
properly, although you will now not have a warning light. On my GMC this warning light module has been disconnected for years because it failed in
this manner.
--
Bob Heller
1974 X-Canyonlands 26ft
Original 455 exc for timing chain, Rockwell intake, valve covers.
AF air bags. 145k miles.
Winter Springs FL

 

[steve southworth]

> I am trying to identify this part from under or behind the dash. This will also be my first attempt to embed a picture. The preview worked! The
> part takes a bulb on the side you can't see.

This is the "low fuel" monitor. In the GMCMH application it does not use the bulb. It senses the fuel gauge level and turns on a warning light when
the gauge reads low. There is a hole between the speedo and the instrument cluster on the back side of the dash it clips into.

Note this warning light is only as good as your fuel gauge reading.
--
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI

 

[steve southworth]

> That's the electronics for the low fuel light.
>
> One of the failure modes of this part is your gas gauge will read almost full all the time on both tanks. Unplug this module and the gas gauge
> works properly, although you will now not have a warning light. On my GMC this warning light module has been disconnected for years because it
> failed in this manner.

That is a new bit of information for me. Thanks for posting.
--
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI