Our 2002 K1500 Suburban only puts out heat when it is accelerating. The rest of time it blows cold air. What could be wrong?

ccowley
0

Asked by ccowley Nov 19, 2012 at 11:41 AM about the 2002 Chevrolet Suburban 1500 LT 4WD

Question type: Maintenance & Repair

2 Answers

tenspeed
69,615

Probably cause would be the water pump. The impeller wears out over time and it's not pumping enough coolant through the heater core at idle. At higher RPM's, more coolant flows. If you ever used any of the stop leak products, it could be that the heater core is clogged.

Darryl Kernahan
175

Check that your coolant is at the proper level as well, if it is low it may only pump enough during acceleration.

Your Answer

Add photo

Related Questions

Suburban
Looking for a Used Suburban in your area?
CarGurus has 17,062 nationwide Suburban listings starting at $1,995.
ZIP:

Search Chevrolet Suburban Questions

Chevrolet Suburban Experts

#1 Eric Fritz
Eric Fritz
Reputation 670
#2 John Saffrahn
John Saffrahn
Reputation 470
#3 Andrew Olsen
Andrew Olsen
Reputation 450
View All

Related Models For Sale

Used GMC Yukon XL"
117 Great Deals out of 5,814 listings starting at $2,990
Used Chevrolet Tahoe"
407 Great Deals out of 28,837 listings starting at $2,495
Used Ford Expedition"
350 Great Deals out of 15,653 listings starting at $1,800
Used GMC Yukon"
195 Great Deals out of 8,166 listings starting at $2,550
Used Cadillac Escalade ESV"
54 Great Deals out of 3,872 listings starting at $4,995
Used Cadillac Escalade"
152 Great Deals out of 6,843 listings starting at $3,995
Used Chevrolet Silverado 1500"
1,617 Great Deals out of 133,317 listings starting at $999
Used Lincoln Navigator"
69 Great Deals out of 4,604 listings starting at $1,550
Used Toyota Sequoia"
87 Great Deals out of 3,991 listings starting at $3,450
Used Ford F-150"
2,094 Great Deals out of 121,748 listings starting at $988
Used Ford Excursion"
15 Great Deals out of 656 listings starting at $2,900
Used Chevrolet Silverado 2500HD"
334 Great Deals out of 28,840 listings starting at $350

Used Cars For Sale

2015 Chevrolet Suburban For Sale
35 Great Deals out of 7,181 listings starting at $40,464
2014 Chevrolet Suburban For Sale
15 Great Deals out of 410 listings starting at $29,488
2013 Chevrolet Suburban For Sale
7 Great Deals out of 410 listings starting at $24,795
2012 Chevrolet Suburban For Sale
3 Great Deals out of 410 listings starting at $21,200