GM Truck Club
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER
Results 1 to 2 of 2
  1. #1

    Default 1998 silverado leaking coolant near heater hoses on heater core

    I have a 1998 Silverado K1500 5.7L 175,000 miles.

    I drove to work today and when I got there I noticed it was leaking coolant from what appeared to be the heater hoses at the heater core. Upon inspection I found it is actually coming from a "spout" that is next to the heater hoses on the core, this is a rubber hose about the same diameter as the heater hoses and makes a 90 degree bend pointing downward. Does this mean I have to replace the heater core? If I do, do I have to remove the dash, or can I just remove the plastic "oil pan" looking part on the passenger side in the cab?

    Thanks in advance for your expertise.
    Attached Thumbnails Attached Thumbnails Leak_Location.JPG  
    Last edited by BigTirez; 03-20-2011 at 12:45 PM. Reason: Adding picture

  2. #2


    Well, I pulled some of the plastic parts off under the dash because I really didn't want to tear into the heater core if I didn't have to. I didn't notice ANY sign of leaking on the plastic under the heater core. Thanks CADDIC for letting me know what that drain was for, upon removing plastic I kind of figured it had to be the evaporator drain. I think it just may have been moisture from the evaporator, it has been quite humid here in the Pacific Northwest and I usually have my climate control on defrost which would run the AC. Is it possible that there was something blocking the evaporator drain and when enough fluid built up it finally broke the dam so to speak? I just purchased the truck in the beginning of March and the previous owner may not have used the defrost as much as I do. Anyway, I am going to keep and eye on my coolant levels and constantly check the passenger floorboard for moisture. If anything further is done I will be sure to update my post. Thanks again for your help CADDIC.

Similar Threads

  1. heater core
    By nextlevel in forum General Chevy & GM Tech Questions
    Replies: 3
    Last: 12-31-2010, 01:57 PM
  2. Leaking Heater Core
    By MidnightGT in forum Chevy Equinox Forum (GMC Terrain)
    Replies: 2
    Last: 10-08-2010, 09:28 PM
  3. 94 Suburban 5.7 heater core
    By blueninja in forum Chevy Suburban Forum (GMC Yukon XL)
    Replies: 5
    Last: 07-25-2010, 03:14 AM
  4. leaking heater core and other problems
    By fireman846 in forum General Chevy & GM Tech Questions
    Replies: 1
    Last: 08-28-2009, 05:26 PM
  5. 92 S-10 Heater Core replacement
    By pmosier in forum General Chevy & GM Tech Questions
    Replies: 1
    Last: 12-08-2008, 11:25 AM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts