now the gas gauge ?

silverhairdeere · 10-04-2008, 01:45 PM

since our last meeting (dead battery thing) now the gas gage is acting up !! with the key off it shows 1/2 tank , with it running all i see is all white . truck is 1989 gmc 1/2 ton what could it be gage or sending unit ? and yes as always i will post the cure (if i find it)

silver hair deere

bradrhale · 10-04-2008, 08:55 PM

hate to say it silver but you seem to have quite a few problems with your pickup. hate to see this and hope that things will eventually clear up for you. with the key off, it will not show an accurate reading since it is not getting any signal from the sending unit. or power to the cluster for that matter. you should have the disc that spins telling you what you have instead of a needle. half is white and the other is either dark grey or black. if it is pegged out, i would check out your wiring for grounding. if your wiring all looks good as well as the connections into the tank, bet is on the sending unit.

FaselZ71 · 10-05-2008, 08:17 AM

I used to own an 86 S-10 and I had the same problem I replaced the sending unit and it fixed the problem. Trust me my S-10 was a wiring nightmere it surpises the truck even ran. gauges cluster wiring rarely as far as I know messes up the sending unit for my truck was 90 + tx at the local parts store so and my truck had a wooden box so it wasn't to big a pain for me but good luck to you!

cburcham73 · 10-07-2008, 04:38 AM

my 89 did the same thing. i had to get a new gauge from lmc trucks.think it was around $90.00. that fixed mine.good luck,check the grounds,wirs etc.

86 heavy chevy · 10-08-2008, 08:58 PM

ive got a similar problem but my gauge doesnt move at all any ideas?

bradrhale · 10-09-2008, 05:50 AM

check the same places. if the needle doesnt move at all, i would check the hot side of the connections as well.

RoadHammerTLM · 10-09-2008, 06:15 AM

Check all connections on the sending unit on the tank.

Hammer

silverhairdeere · 10-10-2008, 03:50 AM

now heres one for you

. went and put gas in it (1/2 tank) and the problem went away . so far .

silver hair deere

cburcham73 · 10-14-2008, 12:08 PM

sounds like your sending unit has a bad spot in the arm . your not getting a constant connection {ohm's reading} when the arm floats up and down.

10-04-2008, 01:45 PM	#1
silverhairdeere Senior Member Join Date: Feb 2008 Location: land between the lakes tn Posts: 1,633	now the gas gauge ? since our last meeting (dead battery thing) now the gas gage is acting up !! with the key off it shows 1/2 tank , with it running all i see is all white . truck is 1989 gmc 1/2 ton what could it be gage or sending unit ? and yes as always i will post the cure (if i find it) silver hair deere

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10-04-2008, 08:55 PM	#2
bradrhale Senior Moderator Join Date: Apr 2006 Location: Texas Posts: 9,536	hate to say it silver but you seem to have quite a few problems with your pickup. hate to see this and hope that things will eventually clear up for you. with the key off, it will not show an accurate reading since it is not getting any signal from the sending unit. or power to the cluster for that matter. you should have the disc that spins telling you what you have instead of a needle. half is white and the other is either dark grey or black. if it is pegged out, i would check out your wiring for grounding. if your wiring all looks good as well as the connections into the tank, bet is on the sending unit.

10-05-2008, 08:17 AM	#3
FaselZ71 Senior Member Join Date: Oct 2008 Location: Northern Michigan Posts: 1,177	I used to own an 86 S-10 and I had the same problem I replaced the sending unit and it fixed the problem. Trust me my S-10 was a wiring nightmere it surpises the truck even ran. gauges cluster wiring rarely as far as I know messes up the sending unit for my truck was 90 + tx at the local parts store so and my truck had a wooden box so it wasn't to big a pain for me but good luck to you!

10-07-2008, 04:38 AM	#4
cburcham73 Senior Member Join Date: Aug 2008 Location: williamsburg virginia Posts: 200	my 89 did the same thing. i had to get a new gauge from lmc trucks.think it was around $90.00. that fixed mine.good luck,check the grounds,wirs etc.

10-08-2008, 08:58 PM	#5
86 heavy chevy Junior Member Join Date: Oct 2008 Posts: 1	ive got a similar problem but my gauge doesnt move at all any ideas?

10-09-2008, 05:50 AM	#6
bradrhale Senior Moderator Join Date: Apr 2006 Location: Texas Posts: 9,536	check the same places. if the needle doesnt move at all, i would check the hot side of the connections as well.

10-09-2008, 06:15 AM	#7
RoadHammerTLM Senior Member Join Date: Sep 2008 Posts: 301	Check all connections on the sending unit on the tank. Hammer

10-10-2008, 03:50 AM	#8
silverhairdeere Senior Member Join Date: Feb 2008 Location: land between the lakes tn Posts: 1,633	now heres one for you . went and put gas in it (1/2 tank) and the problem went away . so far . silver hair deere

10-14-2008, 12:08 PM	#9
cburcham73 Senior Member Join Date: Aug 2008 Location: williamsburg virginia Posts: 200	sounds like your sending unit has a bad spot in the arm . your not getting a constant connection {ohm's reading} when the arm floats up and down.