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Part Identification [message #342787] Mon, 22 April 2019 18:23 Go to next message
ree_eric is currently offline  ree_eric   
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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
Re: Part Identification [message #342789 is a reply to message #342787] Tue, 23 April 2019 06:19 Go to previous messageGo to next message
bobby5832708 is currently offline  bobby5832708   United States
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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
2017 Winnebago 29VE
Winter Springs FL
Re: Part Identification [message #342790 is a reply to message #342787] Tue, 23 April 2019 06:27 Go to previous messageGo to next message
midlf is currently offline  midlf   United States
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ree_eric wrote on Mon, 22 April 2019 18:23
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
Re: Part Identification [message #342791 is a reply to message #342789] Tue, 23 April 2019 06:28 Go to previous message
midlf is currently offline  midlf   United States
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bobby5832708 wrote on Tue, 23 April 2019 06:19
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
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