2001 pontiac grand prix heater problems

30

Asked by Apr 08, 2015 at 01:54 PM about the 2001 Pontiac Grand Prix GT

Question type: Maintenance & Repair

The heater was working fine and then the upper coolant elbow broke. I replaced both the upper and lower coolant elbow. Car is running fine, no leaks, not overheating. But now the heater is not blowing hot air and the heater core hoses are cold when it is at running temp.

8 Answers

7,085

Did you bleed the air from the system, if not, there is a bleeder screw for the cooling system

5 out of 5 people think this is helpful.
30

I'll be damned, lol no I didn't, but makes perfect sense. Thanks, I'm not used to working on GM's. So if you replace the coolant elbows you have to bleed the system?

1 out of 1 people think this is helpful.
61,305

Yes. Your GT has the 3.8 (3800 ) so there's 1 bleeder screw on the thermostat housing. HTH. -Jim

30

awesome, thanks for the help

1 out of 1 people think this is helpful.
61,305

You're welcome. Glad to help. -Jim

10

I also had this issue in my '04, it was the plug located under the glove box kept coming loose

1 out of 1 people think this is helpful.
30

I just needed to bleed the air from the system. I added coolant, ran it till it got up to running temp, opened the bleeder screw, cycled the air out and the heater worked perfectly. Thanks again for the help

1 out of 1 people think this is helpful.
61,305

That's great! Thanks for letting us know. Glad you fixed it. -Jim

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