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 10 of 21

Hybrid View

  1. #1

    Default Coolant leak or heater core issues?


    My truck seems to be leaking a lot of water or coolant after I drive the truck. Dash says my coolant level is now low. There is a lot of liquid being dispelled from the hose underneath the AC condensor by the firewall.

    I rarely run my AC. And I've had on going issues with my climate controls since for the past year. AC sometimes works when it wants to. Normally, the AC is fine on the hwy and crappy on the streets. Heater sometimes kicks in and somethings won't.

    Can anyone give me some pointers here?
    2000 Silverado 5.3L Z71 4x4: K&N air filter, Procomp 16x8 rims, 285/70R16 Toyo AT2s, Kenwood head unit, Alpine 500.1 amp, 12" kicker, Infinity 5.25" speakers, Bilstein HD shocks, EBC GD Sport dimple & slotted front rotors w. EBC green stuff pads, Brembo slotted rear rotors & HIDs.

  2. #2


    Yep, looks like my heatercore is leaking. I was driving today and my vents were smoking. I'll try to hit it with some Alume-seal, hopefully that will fix the problem.

  3. #3


    Maybe I'll just bypass the heater core completely.

    Can anyone tell me what size the tubing going in and out of the firewall is?

  4. #4


    So, I just decided to bypass the heatercore and go without heat all together.

  5. #5


    1 year later, finally attempting to replace me heatercore. Ordered everything I need and starting next weekend.

  6. #6

    Join Date
    Sep 2010
    everett, massachusetts


    what you will need is alot of time to remove dash.

Similar Threads

  1. 1998 silverado leaking coolant near heater hoses on heater core
    By BigTirez in forum General Chevy & GM Tech Questions
    Replies: 1
    Last: 03-21-2011, 09:43 AM
  2. heater core
    By nextlevel in forum General Chevy & GM Tech Questions
    Replies: 3
    Last: 12-31-2010, 01:57 PM
  3. 04 Z71 heater issues. AC sometimes blows hot, heater temp is lukewarm
    By yak in forum General Chevy & GM Tech Questions
    Replies: 0
    Last: 11-04-2010, 10:11 AM
  4. 83 chevy heater core
    By rolly in forum Chevy C/K Truck Forum
    Replies: 5
    Last: 02-02-2010, 03:11 PM
  5. Heater Core Replacement
    By mb73 in forum Chevy Trailblazer Forum (GMC Envoy)
    Replies: 8
    Last: 01-11-2007, 09:30 PM

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