Close
QUESTIONS

RepairPal is your advocate for car care advice and guidance

Q: no heat all of a sudden only blows cold on 2006 Chevrolet Trailblazer SS

Edit
just started
Get a Repair Estimate
Guaranteed by certified locations nationwide. Learn more
RepairPal estimates are guaranteed at over 1,700 quality certified locations nationwide. Learn more
Check for the temperature of the coolant hoses going into and out of the heater core at the back of the engine compartment. If they are scalding hot, then you have a temperature control issue inside the truck. If they are cool or cold (or one is) then you may have an engine thermostat issue.
Didn't find what you were looking for?