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Thread: 2004 z71 heating probs
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11-01-2011, 05:28 AM #1Junior Member
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gold- 2004 z71
2004 z71 heating probs
Hey what's up I was on my way to work an my heater stop wworking but I'm holding good running temp What should I check first
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11-01-2011, 05:57 AM #2Your dealership guy
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Velocity Yellow- 2008 Corvette Z06
By heat not working what happened? Was air still blowing out of the vents but it was just cold? Or was nothing coming out of the vents?
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11-01-2011, 06:46 AM #3Junior Member
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gold- 2004 z71
It was blowing just cold
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11-01-2011, 07:41 AM #4Your dealership guy
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Velocity Yellow- 2008 Corvette Z06
Is it auto-climate control or is it manual?
How is your coolant level and what does the coolant look like? A common issue on the 5.3 is a leaky waterpump. If your coolant level goes down, it could mess with your heat but not overheat the engine.
If you have auto-climate control, it may be the head unit.
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11-01-2011, 11:46 AM #5Senior Member
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red- 95 Z28
Originally Posted by konigandy6
I had a small leak out of my water pump on my 04 Sierra at only 21K miles. New gaskets is all it needed though. If this problem happened suddenly I am inclined to agree with konigandy. I suppose it is also possible that the heater core became clogged rather suddenly, and you're not getting good flow through there.
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11-01-2011, 01:26 PM #6Your dealership guy
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Velocity Yellow- 2008 Corvette Z06
I guess another good question would be how many miles the vehicle has and has the cooling system ever been flushed. We rarely ever see heater core problems with any of the gmt800 platform trucks. Originally Posted by 5.0THIS
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11-02-2011, 06:11 AM #7Junior Member
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gold- 2004 z71
It was water pump It had a leak but thanksgiving a lot
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11-02-2011, 06:14 AM #8Your dealership guy
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Velocity Yellow- 2008 Corvette Z06
No problem at all, glad we could help Originally Posted by chevyman100%
Thanksgiving for stopping by
lol
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