Thermostat issues

Asked by Feb 12, 2016 at 05:20 AM about the 2005 Pontiac Grand Prix Base

Question type: Maintenance & Repair

Temperature gauge goes up and down when
driving doesn't  get close to overheating but drops
all the way down and heater stops blowing cold air
doesn't happen when running idle what can be
issue

2 Answers

79,015

Ya it could be a sticking thermostat, wouldn't hurt to have it replaced, also make sure you are full on coolant.

May need to be bleed out due to air in water system

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