Question about Cadillac DeVille

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I have an overheating problem with my cadillac deville dhs, and i already took it to the mechanic they think it's a fuel pump which sounds rediculous to me. so any help? PLEASE

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I need more info like when overheats and how car acts

Posted on Sep 15, 2010


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There are a lot of coolant lines around the Northstar engine, but not one called a "purge line" that I am aware of. The coolant system is designed to be a closed system, and is never purged.

However, there is a rubber drain line on the pressurized overflow tank that will release coolant on excessive pressure sensed by the rad cap on the tank, or if the rad cap is faulty. If the system has a leak anywhere, it will not hold required pressure and that will always cause overheating. If you are losing coolant, that is the first place to look (bad rad cap, or cracked tank or line from the tank to the rad).

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Please help; my Cadillac Concours 1995 use fuel ? tooooooooo much in 100 km use ? 35 liters (9 gallons) without any smoke or missing. What is problem and how can I fix it????

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There are 53 Cadillac DeVilles with reported gas mileage parked at Fuelly. ... Any Submodel, d'Elegance (1), DTS (1), Concours (2), DHS (4), Base (13), Other (32) ... 4 Vehicles; 27 Fuel-ups; 5,215 Miles Tracked; View All 1995 Cadillac DeVilles ... 2 Vehicles; 9 Fuel-ups; 1,664 Miles Tracked; View All 1991 Cadillac DeVilles.

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02caddy dev.dhs overheating unsure if thermo/water pump.. I was hearing a noise for a couple days before like running water . any ideas to narrow it down .

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What's the easyest way to hot wire a 2000 Cadilac DHS

There isn't one. The 2000 DTS has a VATS security system. The car has to have the right key in the ignition for the system to turn on the fuel pump and the ignition system. Without those, the car no run.

Jun 06, 2015 | 2000 Cadillac DeVille DHS

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How do you change a water pump on a 2001 cadillac deville dhs

need a special tool for this ...its in the back of the engine

Nov 20, 2010 | 2002 Cadillac Deville

2 Answers


The most common overheating problem with the Northstar engine is a blocked purge line. It's job is to purge air out of the cooling system.
There is a small diameter hose coming from near the top of the coolant tank,this is the purge line.
With the engine idling,pull the purge line from the tank,if there is no coolant flow from this small hose,it is blocked and this will cause overheating.If the hose is clear, check for blockage at the nipple on the tank.Or trace the hose back until you find the blockage.The hose goes in to the engine to a crossover and comes out the other side to near the thermostat housing,the blockage may be there.

Jan 28, 2010 | 2002 Cadillac Deville

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Ii have a 2000 Cadillac deville. My question is

Probably the best thing is a Glass shop. It sounds like a part called a window regulator is broke. Hopefully the cracking sound is just the plastic of the regulator and not electricity arcing.
In trying to do this yourself, the window has to be up and braced. Your Cadillac is a big car with big windows. Parts are a little heavier and harder to control.
You can call around for the price, tell them you "WANT TO KNOW THE COST OF REPLACING A WINDOW REGULATOR FOR YOUR CADILLAC DHS."

Aug 08, 2009 | Cadillac DeVille Cars & Trucks

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