2017 Sierra Denali Fuel Gauge Issues

[steve76t]

Hi All,

 

I have a 2017 GMC Sierra Denali 1500 pickup that's giving me issues with the fuel gauge.  When I fill up with gas it only goes up to about the 3/4 mark.  This isn't the first time this the first time this issue has come up for me.  Back in February it did the same thing.  Took it to the dealership & they said that this is a very common issue that happens due to the use of additives in the fuel used in winter fuel blends.  So common that they were getting 3 to 5 vehicles in per day with this issue.  They inspected the truck and then ordered and replaced the fuel sending unit.  This fixed the problem for me at that time but it's back.  

 

Same as last winter, last time I filled up I put 22.3 gallons & the light was not on yet but only got to about 3/4 of a tank on the gauge.  After driving a few miles it creeped up towards towards the full line, but not quite get there.  Then the next time I start the truck it's back down just above the 3/4 tank line even though I've only driven about 10 miles since that last fill up.  It then reads much lower than expected for the remainder of the tank.  For example I've only driven 140 miles of mostly hwy miles on my current tank of gas and already down to the 1/4 tank mark on the fuel gauge. When the gauge is operating normally I'd still be well above the 1/2 tank line at this point.  

 

Who else has had this issue and what'd you do to fix it?  

 

The other concern I have now is that I've had my truck for more than 3 years now & have about 38,000 miles on it.  Concerned that the dealership & GM won't cover the costs of fixing this due to it being past the warranty period even though they'd be fixing an issue that was supposed to fixed less than a year ago.    

Edited December 7, 2020 by steve76t

[JimCost2014]

2 hours ago, steve76t said:

Hi All,

 

I have a 2017 GMC Sierra Denali 1500 pickup that's giving me issues with the fuel gauge.  When I fill up with gas it only goes up to about the 3/4 mark.  This isn't the first time this the first time this issue has come up for me.  Back in February it did the same thing.  Took it to the dealership & they said that this is a very common issue that happens due to the use of additives in the fuel used in winter fuel blends.  So common that they were getting 3 to 5 vehicles in per day with this issue.  They inspected the truck and then ordered and replaced the fuel sending unit.  This fixed the problem for me at that time but it's back.  

 

Same as last winter, last time I filled up I put 22.3 gallons & the light was not on yet but only got to about 3/4 of a tank on the gauge.  After driving a few miles it creeped up towards towards the full line, but not quite get there.  Then the next time I start the truck it's back down just above the 3/4 tank line even though I've only driven about 10 miles since that last fill up.  It then reads much lower than expected for the remainder of the tank.  For example I've only driven 140 miles of mostly hwy miles on my current tank of gas and already down to the 1/4 tank mark on the fuel gauge. When the gauge is operating normally I'd still be well above the 1/2 tank line at this point.  

 

Who else has had this issue and what'd you do to fix it?  

 

The other concern I have now is that I've had my truck for more than 3 years now & have about 38,000 miles on it.  Concerned that the dealership & GM won't cover the costs of fixing this due to it being past the warranty period even though they'd be fixing an issue that was supposed to fixed less than a year ago.    

Have you let the dealership know the issue is back?

 

I believe parts replaced under warranty have their own 12/12000 warranty, so if it is what is failing, it should be covered. But I would check to make sure with your dealer.

[steve76t]

57 minutes ago, JimCost2014 said:

Have you let the dealership know the issue is back?

 

I believe parts replaced under warranty have their own 12/12000 warranty, so if it is what is failing, it should be covered. But I would check to make sure with your dealer.

Not just yet...  Just started back up again with the last two fill ups, the last one being worse the than the previous fill up.  Going to see what my next fill up later this week looks like before calling the dealership again.  

 

[JimCost2014]

3 hours ago, steve76t said:

Not just yet...  Just started back up again with the last two fill ups, the last one being worse the than the previous fill up.  Going to see what my next fill up later this week looks like before calling the dealership again.  

 

I would just let them know, so they can put it the service records on the truck, better safe than sorry later when you have even more miles on the truck.