GM Volt Forum banner

581 - 592 of 592 Posts

·
Registered
Joined
·
23 Posts
?? None of the fluid reservoir tanks in my 2011 Volt or my 2017 Bolt have a float that I have seen. For sure the battery coolant reservoirs do not.
Thanks Steverino (y) I never looked at the tank all that closely, just going by what they told/sent me. I figured in either case that the switch bypass would fix the issue, whether there was something inside the tank telling the switch (incorrectly) that the level was low OR if it was a bad switch. Please correct me if I am wrong, but as long as the SHVCS warning isn't being displayed, I can just install the bypass and it shouldn't come back? Doug
 

·
Registered
Joined
·
1,263 Posts
?? None of the fluid reservoir tanks in my 2011 Volt or my 2017 Bolt have a float that I have seen. For sure the battery coolant reservoirs do not.
Steve, I'm 99% sure the battery coolant reservoir in my 2015 has a float switch at the bottom. I have removed the sensor from the reservoir and bench tested it. It is a simple magnetic switch and can be activated by attaching an ohmmeter and then placing a magnet near the base. The float switch has a float and a magnet at the bottom. The float holds the magnet up until the fluid level gets too low, then the magnet falls to the bottom of the tank, activating the sensor which is mounted just below it. Your 2011 didn't come with the float switch from the factory, but it should have been added by a dealership when it was retrofitted.
 
  • Like
Reactions: bentbiker

·
Administrator
Joined
·
20,023 Posts
Maybe I'm wrong.But I don't see one in the tank. I'm not finding one in parts diagrams either. Could it be a non-replaceable part molded in when the tank was made?
 

·
Registered
Joined
·
1,263 Posts
Maybe I'm wrong.But I don't see one in the tank. I'm not finding one in parts diagrams either. Could it be a non-replaceable part molded in when the tank was made?
The only way I could see it would be to drain the tank and use a flashlight. The only service manual I have is for a 2012, so it wouldn't show up there. I'm thinking you're right about the float being non-replaceable and installed when the tank was molded.
 

·
Registered
Joined
·
23 Posts
OK guys, I guess this is a little bit of a thread hijacked but here goes anyway :)

It took six LONG days for the bypass to get to me in Chandler AZ from Chico CA. I had all the codes reset at the Chevy dealer, then drove the car home on hold in hopes that not using the battery would decrease the odds of the SHVCS warning coming back on. We left the car sitting unplugged until today, I just installed the switch bypass at lunch. The hardest part BY FAR was getting the clip to release so I could pull the cable from the bottom of the reservoir. All the rest was easy ! I haven’t driven the car yet, but no warnings and no CEL when I briefly turned it on after reconnecting the battery (y)

One last question, and the reason this is a bit of a hijack, where is the overflow hose from the battery coolant reservoir supposed to go? In the process of finding a place to Velcro my switch bypass, I discovered that my overflow tube just goes kind of behind the right headlight and hangs there. Is it supposed to be clipped to something or go into a hole somewhere?

Thanks again, thanks especially to the folks who developed and produce the switch bypasses! Doug
 

·
Registered
Joined
·
23 Posts
I have the SHVCS error currently and the only dealer is 2+ hours drive. I want them to clear the codes and replace the sensor so that the error doesn't return before I get home again to install the defeat. Does this make sense or does the dealer clearing the codes keep the car error free for a while even with the original sensor in place?
Hey Alkers. Mine was diagnosed as having a stuck float in the reservoir, which is $733 at the two dealers I checked. That was a no go for me, so I just had them clear all the codes and drove it home on hold. Now my drive home was probably only 20 minutes or so, but the warning did not come back. I ordered the bypass and let the car sit until today, when I had a chance to get it installed. No CELs or warnings when I briefly turned it on(y)
 

·
Registered
Joined
·
3 Posts
I ended up making the trip to the dealer and they then told me after a four hour wait that their technician wasn't in that day and I'd have to make another appointment - complete waste of a trip.

In the meantime, my sensor came and I installed it.

I'm just not clear on the last step of the instructions, should I put the sensor back in place underneath the reservoir and then cap it with the connector that the defeat came connected to?

I don't need to do anything with the two wires coming from this connector?

Can I not remove the sensor all together once the defeat is installed?
 

·
Registered
Joined
·
3 Posts
I ended up making the trip to the dealer and they then told me after a four hour wait that their technician wasn't in that day and I'd have to make another appointment - complete waste of a trip.

In the meantime, my sensor came and I installed it.

I'm just not clear on the last step of the instructions, should I put the sensor back in place underneath the reservoir and then cap it with the connector that the defeat came connected to?

I don't need to do anything with the two wires coming from this connector?

Can I not remove the sensor all together once the defeat is installed?
I should add I've ordered a vx nano so I can reprogramme the modules myself to clear the codes
 

·
Registered
Joined
·
23 Posts
I'm just not clear on the last step of the instructions, should I put the sensor back in place underneath the reservoir and then cap it with the connector that the defeat came connected to?

I don't need to do anything with the two wires coming from this connector? Can I not remove the sensor all together once the defeat is installed?
The male plug with the wire pigtail is not necessary, it just fills the hole in the sensor to keep junk out of there. I just bent the wires back upon themselves and wrapped with electrical tape before plugging it in to the bottom of the resevoir. Good question on removing the sensor from the bottom of the resevoir... If it doesn't cause a leak or anything (not sure exactly what is going on down there), I don't see why it couldn't be removed. That said, I found getting the wire unplugged pretty frustrating so I won't be messing with mine :eek:

Doug
 

·
Registered
Joined
·
23 Posts
One last question, and the reason this is a bit of a hijack, where is the overflow hose from the battery coolant reservoir supposed to go? In the process of finding a place to Velcro my switch bypass, I discovered that my overflow tube just goes kind of behind the right headlight and hangs there. Is it supposed to be clipped to something or go into a hole somewhere?
Anyone, anyone? Bueller? My car was babied before I got it, and completely unmolested, so I'm thinking that overflow just dangles behind the right headlight?

Thanks again, Doug
 
581 - 592 of 592 Posts
Top