Question about 2002 GMC Yukon Denali

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Recently, I am getting a low coolant warning. I put more coolant into the reserve plastic coolant holder and the message went away. But now it came back?

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Is the coolant low again, is the coolant leaking somewhwere,( find leak & fix)it is important that the engine has enough coolant or the repair bills can be enormous

Posted on Apr 09, 2011

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Have a look at the level if it whent down again ther is either a leak or you are burning coolant
if level is up the low coolant sensor is corroded or defective need to replaced
your truck should be factory filled with orangee coloured collant (extended life) if mix with
any other style coolant could and most lickly will cause contamination in system
also universal or camillion coolant should not be used (i dont recomened)

Posted on Apr 09, 2011

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1. Unplug the sensor harness from the bottom of the coolant bottle.

2. Find a large paper clip and use needle nose plyers to make a "staple" shaped jumper that is about 1/4 inch wide (about the distance between the two contacts on the harness) and about 3/8 inch long.

3. push the jumper you just made into the end of the harness connector.

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5. If all works well, use electrical tape to seal up the end of the harness so moisture doesn't get in. Also it's a good idea to secure the harness to something nearby so that it doesn't flop around when you are driving.

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