20 Most Recent 2003 Buick Regal - Page 5 Questions & Answers

This is a problem caused by a sticking door ajar/courtesy light switch. The switch signal goes to the BCM (body control module) and that turns on the interior lights. Since each door has this switch you need to have the dealer use a special tool to scan the module inputs from the door switches and see which door switch is causing the lights to stay on.

if you have to ask dont attempt

Ask a local mechanic to look at it for you,its similar to a vauxhall vectra for the electrics as a common engineered vehicle sold in different countries by one manufacturer often uses universal parts but its the auto box where i get lost here as in europe only old women and invalids buy a auto option where you have to pay a lot more money for the auto version compared to a manual or stick change to our cousins over the big pond

chances are you have a head gasket leak, the top of the engine will need dismantling, the head may need skimming on a milling machine, the radiator, thermostat & water pump should all be replaced at the same time as a premature failure of one such as the head usually means the imminent failure of the others, everything apart from the head can be done at home by even a novice mechanic with a Chilton's manual to save on cost & a replacement head gasket done by a decent garage should cost between 500 - 700 bucks, but call around to get the best price.

check the catalytic converter. it may be plugged up with carbon.

The fuel relay is located in the fuse box under the hood, to remove it just pull it up an d out of it's socket.__________________________Mitchell on demand 5

I would check for a dirty throttle body and a faulty idle air control valve.

Call dealership or look online.

This problem is causes by a defective fuel level sending unit, The sending unit is located inside the gas tank and the gas tank must be removed from the car and the fuel pump module (contains level sensor) replaced to correct the problem. This job requires a hydraulic floor jack, safety stands to hold the car in the air safely and a very good set of common hand tools plus a special tool to remove the fuel lines from the tank. Time to complete is about 4 hours on the ground.

The 3.1L and 3.4L V6 intake coolant. Open hood take off plastic cover over engine. Under the cover you will looking at the upper intake manifold.On the left edge and the right edge of the lower intake is wet or oily wet looking thats where your loosing coolant. There are also 2 electric fans that come on when engine reaches 210deg f. A quick check on the fans is to turn ac on and fans will come on in a minute. 3.8L v6 had a plastic intake and could have same issue. some of those were known to crack and leak.

some times the tracks bind up remove the seat and turn the gear boxes with a pier of pliers to free them up

May not be put back together correctly,after a filter change or what ever

I have a 2002 buck regal-- the lights have gone a few times also and I think it was always with the brights-- anybody else?