Why does my GMC 2500 have a low coolant light?
Why does my GMC 2500 have a low coolant light?
A good diagnosis goes a long way. Would’ve saved you from having to buy 2 coolant tanks. I have a 2017 GMC 2500 HD with the 6.6 Duramax. The truck now has about 35,000km on it and the low coolant message is appearing at almost every start up. The tank is not low but I topped it off right to the cap and the message still pops up.
Are there any low coolant warnings on my Silverado?
From buying research to owner support, join 1.5 MILLION GM Truck Enthusiasts every month who use GM-Trucks.com as a daily part of their ownership experience. I have a 2017 Silverado 3500 Z71 LTZ Crew Cab Midnight, I seem to be getting consistent low coolant warnings, the actual fluids are fine.
What kind of truck has low coolant light?
The truck is a 2019 2500HD with 30,000 miles. I have a friend with a 2017 with 30,000 and its now doing the same thing. Dealer did a pressure test of the coolant system and found a head gasket issue. This is the 5th truck he has had with this issue in the last 2 months.
Why does my coolant light come on when I start my truck?
The “Coolant Level is low” warning came on this morning. Is this typical for a brand new truck? I have never had this happen with a vehicle that is that new. I don’t know if diesels burn up the coolant or if there is a problem with my truck.
A good diagnosis goes a long way. Would’ve saved you from having to buy 2 coolant tanks. I have a 2017 GMC 2500 HD with the 6.6 Duramax. The truck now has about 35,000km on it and the low coolant message is appearing at almost every start up. The tank is not low but I topped it off right to the cap and the message still pops up.
Is the coolant level on my Silverado Sierra low?
A Low Coolant message may be displayed on the Driver Information Center of some 2017-2018 Silverado and Sierra models equipped with the 6.6L Duramax diesel engine (RPO L5P). An inspection of the radiator surge tank may appear to show a low coolant condition.
The truck is a 2019 2500HD with 30,000 miles. I have a friend with a 2017 with 30,000 and its now doing the same thing. Dealer did a pressure test of the coolant system and found a head gasket issue. This is the 5th truck he has had with this issue in the last 2 months.
When did the coolant message come on on my Silverado?
Bought my 2017 GMC denali 2500 HD 6.6L on 5/6/17 and that night the coolant message came on….Brought the truck back the next day, service writer opened the coolant cap which turned off the message for two days and they/he didn’t “see” the message on the dash or in the scan tool history.
What happens if your coolant light goes out?
If the light goes out then the switch is bad. If not then you could possibly have an open wire and the pcm isn’t seeing that the switch is closed thus keeping the light on. A multi-meter can tell you if a wire is open.
Can a PCM turn off a low coolant light?
Yes. If the light goes out then the switch is bad. If not then you could possibly have an open wire and the pcm isn’t seeing that the switch is closed thus keeping the light on. A multi-meter can tell you if a wire is open. Yes.
What to do if your coolant level is low?
Try the paperclip first to rule that out. You’ll need to find the wires at the PCM that come from the switch. Then with a multi-meter set on ohms you put one lead on the wire at the PCM and the other lead on the wire at the switch.
If the light goes out then the switch is bad. If not then you could possibly have an open wire and the pcm isn’t seeing that the switch is closed thus keeping the light on. A multi-meter can tell you if a wire is open.
Yes. If the light goes out then the switch is bad. If not then you could possibly have an open wire and the pcm isn’t seeing that the switch is closed thus keeping the light on. A multi-meter can tell you if a wire is open. Yes.
Try the paperclip first to rule that out. You’ll need to find the wires at the PCM that come from the switch. Then with a multi-meter set on ohms you put one lead on the wire at the PCM and the other lead on the wire at the switch.
What to do if your coolant light is not working?
You’ll need to find the wires at the PCM that come from the switch. Then with a multi-meter set on ohms you put one lead on the wire at the PCM and the other lead on the wire at the switch. If it reads OL then the wire is open. If you get some numbers then its not open. If its open then just run a new wire from the pcm to the switch.
Why does my car have a low coolant warning?
A customer may comment on a coolant leak, coolant consumption or of a low coolant message being displayed on the Driver’s Information Center (DIC). This may be due to cooling system leaks or an improper coolant fill procedure.
Where is the low coolant message on a Duramax?
During PDI, coolant should be added to fill the upper chamber of the radiator surge tank. (Fig. 6) A coolant level that is low enough to turn on the Low Coolant message will be below the horizontal line across the radiator surge tank. (Fig.
