heater

Asked by jam101 Dec 17, 2016 at 04:55 AM about the 2004 Chevrolet Silverado 1500 LS 4WD

Question type: Maintenance & Repair

2000 Chevy Silverado no heat in cab

1 Answer

Super late to the party here but I'm experiencing the same issue on my 2001 Silverado 1500 LS 4WD. G A's answer above is solid. Lower radiator hose is straight-up cold while the upper radiator hose is really hot. Same for the two hoses going into the firewall (I believe to the heater core). One of those is really hot, the other is barely warm. Engine temp runs normal all the time. I've been told that there is a high probability that the thermostat is stuck in the open position. I will be replacing the thermostat this morning (Dec 22, 2019... First official shortest day of the year). It's the easiest and cheapest fix. If that does not solve the issue I may have to consider the actuator blend door or worse... the heater core. If the heat does not work after the thermostat replacement, I've been told to try using the garden hose to clean out the two lines that go into the firewall (to the heater core) as G A above suggests. I've watched enough vids to hope that it is the thermostat. The blend door requires taking the dash apart for access. The heater core looks to require even more in-depth dash removal. Neither look too daunting other than the time and patience that is needed.

Your Answer:

Own this car?

Share your experience with others.

2004 Chevrolet Silverado 1500

Review another car

CarGurus Experts

  • #1
    Rowefast
    Reputation
    10,500
  • #2
    John Carson
    Reputation
    9,670
  • #3
    Andrew Olsen
    Reputation
    9,660
View All

Know more, shop wisely

Search

Related Models For Sale

Used GMC Sierra 1500
1,873 Great Deals out of 68,846 listings starting at $1,900
Used Ford F-150
6,503 Great Deals out of 162,814 listings starting at $993
Used Chevrolet Silverado 2500HD
1,035 Great Deals out of 39,031 listings starting at $4,700
Used Toyota Tundra
1,061 Great Deals out of 31,023 listings starting at $2,250
Used Dodge RAM 1500
52 Great Deals out of 1,387 listings starting at $975
Used Toyota Tacoma
2,259 Great Deals out of 53,357 listings starting at $4,995
Used Chevrolet Tahoe
1,356 Great Deals out of 34,404 listings starting at $1,550
Used Chevrolet Colorado
987 Great Deals out of 29,817 listings starting at $2,795
Used GMC Sierra 2500HD
523 Great Deals out of 24,594 listings starting at $5,900
Used Ford F-250 Super Duty
1,300 Great Deals out of 50,571 listings starting at $2,000
Used GMC Yukon
635 Great Deals out of 15,606 listings starting at $3,980

Used Cars for Sale

2024 Chevrolet Silverado 1500 For Sale
261 Great Deals out of 35,630 listings starting at $25,486
2023 Chevrolet Silverado 1500 For Sale
502 Great Deals out of 5,647 listings starting at $19,995
2022 Chevrolet Silverado 1500 For Sale
595 Great Deals out of 6,627 listings starting at $19,900
2021 Chevrolet Silverado 1500 For Sale
534 Great Deals out of 7,029 listings starting at $13,585
2020 Chevrolet Silverado 1500 For Sale
397 Great Deals out of 4,626 listings starting at $13,500

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.