Question about 1998 Cadillac DeVille

2 Answers

How long does it takes to replace a heater core in a 1998 cadillac deville

Posted by on


2 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

The same thing happend to me I found the heater core online for 110$ but my mechanic said dashboard needs to be removed so meanwhile hes gonna bypass it somehow

Posted on Mar 11, 2012

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

I was surrounded by smoke in the inside of the car while i was driving the car started to overheat and antifreeze poured into the inside passeger side of my car is it the heater core and is it exspensive?

Posted on Feb 15, 2010


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

How to replace my heater core in my Cadillac DeVille 1998?

First, according to the manual, disable the SIR system

Fuse panel in trunk behind back seat driver's side

Connection to left of steering column

Remove glove box
and unplug second SIR connector

Then remove bottom insulator panel and disconnect battery
HVAC programer can be pulled out of it's plastic cradle and then the top and bottom air door actuators must be removed

Then just two screws and you have the heater core uncovered.

Nov 04, 2013 | 1998 Cadillac DeVille

2 Answers

98 caddy deville nothstar v8 how to replace heater coil have no heat and I'm loosing water somewhere

the heater core in a 1998 Cadillac is very tricky to replace.
start with getting a pressure test to determine where the exact location of the leak is, it may not be the heater core.
if you do decide to pull the dash apart to change the core make sure the battery is disconnected for at least an hour to allow the airbag system to discharge.

Oct 11, 2012 | 1998 Cadillac DeVille

1 Answer

My heater dont work it blow out air but there very lil heat

Check whether the heater core is clogged by feeling the two tubes at the firewall that lead to the heater core. If they are cool rather than hot when the car is at normal operating temperature, the heater core will have to be flushed out, or replaced.

If the two tubes at the firewall are hot, but the interior doesn't get heat, then a blend door problem may exist where it is at the wrong angle due to a faulty vacuum motor, or control for the vacuum motor.

Good luck on getting heat inside of your 1998 Cadillac Deville.

Jan 21, 2011 | 1998 Cadillac DeVille

2 Answers

I have a 1998 Cadillac deville its over heating and theres water in the passenger floor board

Sounds like heater core is leaking,you can check under the hood where the heater hoses go into the firewall and make sure they are tight but you will likely need a new heater core...ope this helps

Nov 27, 2010 | 1998 Cadillac DeVille

1 Answer

How do i replace a heater core in a 1999 cadillac deville


Here is detailed solution on how to replace the heater core in the 1999 cadillac deville;

STEP 1 Disconnect the negative battery cable.

STEP 2. Drain and recycle the engine coolant.

STEP 3. Disconnect the heater core hoses using tool J-37097 or an equivalent.

STEP 4. Remove the right side sound insulator and the glove box module.

STEP 5 Remove the programmer shield, if equipped, and disconnect the air mix valve link.

STEP 6 Disconnect the programmer vacuum and electrical connectors.

STEP 7 Remove the heater core cover, leaving the programmer attached.

STEP 8 Remove the heater core retaining screws and the heater core.

have a nice day..

Aug 27, 2010 | 1999 Cadillac DeVille

1 Answer


tear the dash apart and replace or have some one else do it if tearing the dash apart doesn't suit you

Jan 11, 2010 | 1998 Cadillac DeVille

1 Answer

How to remove and replace a heater core for a 1998 Cadillac Deville?

if I remember correctly the engine has to be removed.

Nov 02, 2009 | 1998 Cadillac DeVille

3 Answers

How to remove heater core

On the firewall on the passnager side find the heater core feed and return hoses (bkack in color and usually have a clamp or two on them. remove the hoses and replace with a single piece by-passing the heater core.

Feb 01, 2009 | 1998 Cadillac DeVille

1 Answer

I have 1998 cadillac STS and the heater blows cold air only

this problem is caused by a defective air temp control blend door motor, this door and actuator motor is located inside the dash between the heater core and the AC evaporator core, it shifts airflow through the heater core or the AC core or mixes or blends the two for the desired temp at the outlets, the motor will have to be replaced. This is a very common issue.

Jan 21, 2009 | 1998 Cadillac DeVille

Not finding what you are looking for?
1998 Cadillac DeVille Logo

609 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cadillac Experts


Level 3 Expert

77201 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22265 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

Are you a Cadillac Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides