20 Most Recent 2004 Cadillac CTS - Page 7 Questions & Answers

A failed brake light switch or brake light circuit fuse will cause BOTH problems. Start by verifying that the fuse is OK, then proceed with replacing the brake light switch if the fuse was not at issue.

The sender unit,which measures your fuel, is a resister attached to a float.(basically) the more fuel the less resistance,and the gauge reads a full tank .I believe this little unit has worn out.Unless you have an access hatch in the floor under the rear seat to access the unit the gas tank has to come out to replace.Contact your dealer for this information.This unit is incorporated into your fuel pump so this gets replaced as well. It can get pricey to deal with,so you might just want to keep the tank full all the time,given this is a ten year old car you have to be the best judge as to how much you want to spend on it .good luck

I would say most likely the ignition coils are bad The dealer made their money when they sold it to you They can fix it, but don't have very high standards for the techs or no supervision,something ! Almost half the people that come to this site can't get a vehicle even diagnosed at a dealer The technology is passing everyone by You have ignition coils on each cylinder They only last about 6 to 7 years & will go into failsafe if they misfire bad enough,that is called a Class A misfire,you won't pick those up in the shop with test equipment,maybe on a scope, but I doubt many mechanics use one or know how Have to just walk a new coil,road test or replace the coils, when you have those issues The main problem is vehicles are only driven Never tested during the year & no one knows that you have to do anything other than change the oil & wait for them to break down & that is what is happening I would change all the ignition coils 6 or 8, replace the front oxygen sensors & clean the maf sensor & replace the spark plugs every 3 years,those I would have done the week I bought it I hope you changed ALL the fluids, power steering,trans, brake & rear axle. Need to road test with a professional scan tool to look at all data & look at cylinder misfire count,fuel trim & see that the 8 monitors run clear,you need them okey, in order to go to inspection & pass

Yep,should be 2 clamps I believe.

Check for miss adjusted shifter cable. But sounds like you need a new tumbler of key switch.

Sorry then you do not qualify for the recall.

Then it does not apply, recalls go by vin number on all makes and models, just because there is a recall that doesn't mean your particular car's VIN has the problem. Contact the dealer for a read out of all Recalls or call GM customer service with your make model and VIN code..

Hello Lillian.
Your CTS does not have a dipstick to check the level.
There is a procedure for checking it but it needs to be done by lifting the car high and level to access a plug on the side of the transmission.
Here is the procedure.

AUTOMATIC TRANSMISSION FLUID LEVEL CHECKING PROCEDURE

1. Start the engine and allow the engine to idle until the transmission fluid normal operating temperature has been reached.
2. Depress the brake pedal and move the shift lever through the gear ranges, pausing a few seconds in each range. Return the shift lever to the PARK range.
3. Raise the vehicle on a hoist. The vehicle must be level, with the engine running and the shift lever in the PARK range. CAUTION: The engine must be running when the transmission fluid fill plug is removed, or excessive fluid loss will occur. Transmission fluid may be hot. Since the actual fluid level is unknown, stand clear when removing the fill plug. Have a container ready to capture any lost fluid. Do not turn the engine off with the fill plug removed, as you can be injured by hot transmission fluid being expelled out of the oil fill opening.

If you would like further advise on this matter, please ask me here in a comment.
Thank you for using FixYa.

KL

the first thing you need to do is get the vehicle scan as the check engine light is up meaning you vehicle is in limp mode

I have a 2004 cadillac cts. I'm getting ready to give it a tune up. Do the valve covers get filled with oil and there fore need to be replaced as well??

I got a 2004 cadillac cts with 130 thousand miles and I'm getting ready to give it a tune up. do the valve covres get filled with oil?? where as i would have to replace them too??

need unlock code or take to any GM dealer to unlock

P0300 = radom misfire could be any cylinder monitor engine misfire screen and see which cylinder is misfirering