Why does my GMC Truck have a low coolant light?
Why does my GMC Truck have a low coolant light?
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. I stopped by the dealership and they said this is common as the sensor is in the surge tank and the fix is to replace the surge tank to the tune of $600.
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.
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.
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.
When does the low coolant level light come on?
When you start the engine, the low coolant level light should come on for a second or two and then go out. If it doesn’t go out, either the coolant level is too low or there is a problem with the sensor system. `. The light usually shows either a thermometer or a box, often with wavy lines to indicate liquid.
What happens if the coolant level in the reservoir is low?
If the coolant level in your reservoir is very low, below the “Min” or “Low” mark, there’s a decent chance you have a leak somewhere. We’ll get to that in a minute — but there is always the chance that you just need to add more coolant.
What do the coolant levels on my car mean?
It will have levels marked “Min” and “Max,” or “Low” and “Full,” that indicate the actual coolant level when the vehicle’s engine is cold. Your owner’s manual has the correct information for your vehicle.
What to do if your Radiator is leaking coolant?
If not, the worn hoses should be replaced. If your radiator cap and hoses are fine, but there are coolant leaks around the engine, or coolant puddles on the ground, you could have a faulty radiator, water pump or thermostat housing. Solution: Get your vehicle to a mechanic immediately. Have it towed if necessary.
Where is the low coolant sensor on my truck?
Maybe 6 or 8 inches down from the top on either side as Freddyack stated. Low coolant light. My truck is a ’93 6.5 C2500 and the low coolant sensor is in the passenger side radiator tank. About a foot down from the top.
Where is the low coolant warning lamp located?
See “Cooling System- Low Coolant Warning Lamp Circuit,” page 96 of DB Student handbook. “One of the end tanks has a fitting for the probe used in a low coolant warning lamp circuit (see Figure 4-12). The monitoring circuit is located in a module mounted behind the instrument cluster.
Is the low coolant light on on my Silverado?
Test drove 5 miles and no low coolant light on. Checked for TSB’s and found 17-NA-110 for this exact concern. From factory they are under-filled, Allowed to cool down completely and added 1 quart. Got to operating temp as to bleed air pockets and fill surge tank. Allowed to cool again and rechecked coolant level.
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.
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.
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.
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.
When does the low coolant level warning light go out?
When you start the engine, the low coolant level light should come on for a second or two and then go out. If it doesn’t go out, either the coolant level is too low or there is a problem with the sensor system.
