That is what I would look at especially if have to make up coolant level
SOURCE: Just replaced leaking radiator in my 2001 Grand
Hi
You need to bleed the heater system, suspect you still have an air lock in it.
Slacken off outlet side of heater, hose clip. and run engine at 1000rpm, pull off the hose, once the flow is coming out constant, refit hose and tighten clip, and top up coolant.
Good Luck !
A FixYa would be appreciated !........ Thanks....John
SOURCE: Prizm overheats, heater core leaks, no heat
You can bypass the core or fix it that's up to you but I would change or remove the thermostat first. If it still overheats then start looking at the water pump and radiator. Hope this helps. Good luck.
SOURCE: 1999 cadillac seville sls it over heats when in drive
how many miles are on it? if you have over 70k the head bolts may have let loose and allowed the head gaskets to leak they all do it
SOURCE: NOT GETTING ANY HEAT AT ALL, REPLACED WATER PUMP,
Make sure the blower runs, then make sure the heat and ventilation control doors move as they should. If you have hot coolant flowing through the heater core, air flow through the core, and appropriate air flow path, then you will have heat.
SOURCE: 2001 Cadillac Seville SLS Car does not run other
Well, the first thing one should check is the transmission fluid level. Add Dexron ATF to the transmission until full when the vehicle is at normal operating temperature after 30 or 40 minutes of driving.
Secondly, if the car's transmission hasn't been flushed and filled in 30,000 mi. it's recommended that you do so as normal maintenance. This service typically costs about $100 or so.
If the car only runs forward but not reverse, a solenoid may be plugged up with clutch dust, or it's shorted out and needs to be replaced. However, tearing down a transmission on a 2001 Cadillac Seville is rather expensive, in the thousands of dollars.
One might consider getting a good used transmission that has a guarantee on it and have it installed, or have the one in it rebuilt.
Good luck on this repair.
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