Need Help?

2004 GMC Sonoma SLS Crew Cab 123 WB 4WD

2004 GMC Sonoma
Trim Info:
4-Wheel Drive, Crew Cab 4.7' Fleetside SLS
15 mpg city / 19 mpg hwy
Other Trims
Do you own this car?
Estimated Mileage
Enter current mileage for most
accurate info about this vehicle

Track Your Service Records
Get Recall Alerts
Get Updated Value Estimates on Your Car.
back to question list

Ask the Community

Ask Our Auto Mechanics

December 31, 2012, 4:05 pm

Jamie H

Question: Running hot, heater won't come on.

Ok folks here is the story. My heater stopped working and then 2 days later my truck starting running hot when only driven like 5 miles. I checked fuse for the heater and was still good. took out blower motor and was not able to get it to turn on using a jumper. bought new one and still get nothing. Replaced the thermostat and still running hot. any ideas?

January 5, 2013, 12:12 pm

Ron W
Expert Mechanic

Sounds like air in the cooling system, or restricted coolant flow. You should make sure the air is bled from the cooling system.

0/0 users found this helpful.

Ask our panel of certified auto mechanics a question. We pay for their advice so you don't have to

My Auto Score

See the free AutoCheck score

Meet The Experts
Kim Perrin
Kim Perrin is our resident mechanic here at DriverSide. Kim worked as…
Tyler Orr
Tyler Orr is an expert in German and Japanese cars and has been a mechanic …
Elizabeth Kriesten
Elizabeth Kriesten worked as an automotive technician for several years at Dodge…
Tips on Servicing

Car Brakes: How Do You Know When to Change Them?

By Zach Bowman For those who suffer a daily commute through heavy traffic, your vehicle's braking system can bring thousands of pounds of metal, plastic and empty Starbucks cups to a stop hundreds of times before you get to work. It goes without saying that these pieces wear out, but they do so slowly, meaning you may not notice they need attention until ...

Read more…