Is the low coolant light on on my Silverado?
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. 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...