20 Most Recent 2007 Cadillac STS V Sedan - Page 3 Questions & Answers


The fuel sending unit in the gas tank is bad and you will need to replace it by dropping the tank down and pulling the fuel pump housing out as it is mounted on the side of the assembly. Run the tank low as possible if you pull the tank off and there is a inspection cap on top and you can remove the assembly after disconnecting the fuel lines and wires on top of the tank. Hope this helps.

Cadillac STS... | Answered on Jun 04, 2017


the crank has to be on tdc for the piston position
on the right hand bank ( left side looking at the front of the engine , the top most cam is the inlet cam and the letters RI will be at the 9 oclock position on the top side of the shaft boss on the cam gear the lower cam gear will have the letters re in the same position
on the other bank the top cam gear will have li at the 3 oclock position and the lower cam gear will have re in the same position
use the position as 90 degrees to the head and taken through the cam shaft center

Cadillac STS... | Answered on May 14, 2017


Did you pull on the wires ? Is the PCM - engine computer near the headlamp you replaced ? They may share a common ground . Check body grounds , Do you know what these are ? Black wires with metal eyelets bolted to the body under the hood in engine compartment !

Cadillac STS... | Answered on Sep 17, 2016


Amy, DTC P1645 Evaporative Emission (EVAP) Purge Solenoid Control Circuit. You may want a good Tech, to diagnose and estimate repair. Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
Need help to solve P1645 code
1997 Cadillac Deville Engine Performance Problem 1997 Cadillac

Cadillac STS... | Answered on Jul 28, 2016


What's the voltage reading at the battery with the engine running ? 13 to 14.1 volts ? If not, it's not charging .Sounds to me like it's not charging ! Is there battery voltage at the heavier gage wire on the back of the alternator ? Does the battery symbol light on the dash work ?

Cadillac STS... | Answered on Feb 09, 2016


in most vehicle you would have to remove the inside door panel to gain access to the screws holding the mirror from inside the door..

Cadillac STS... | Answered on May 29, 2015


Look under the hood in the engine compartment an see if there is fuel leaking from a fuel hose or fuel pressure regulator . The gas smell will be stronger under the hood ! If you don't find anything I would take to a repair shop before it catches fire an burns up !

Cadillac STS... | Answered on May 16, 2015


How you start you car used to depend on were you lived and what the average temperature is. Gasoline is tempers for the environment. Gas in the North during winter is more volatile the in the south. and so it all depends on what is in the tank and what is the temperature. so if you filled up in the summer or you are low on gas then you have several possibilities. You could have water in the tank if you are less then full, since the pump pulse off the bottom of the tank, if you have water in the tank you might be feeding only water to the engine, if you filled up in the summer and live up north you might have the wrong gas mixture and this would be hard to fire. Also you battery might not really be that strong and you might not be turing over fast enough to catch. take your pick
best of luck

Cadillac STS... | Answered on Apr 12, 2015


Re: Where is the lower radiator hose?(99)
Stand in front of the car, open the hood, and face the engine.

On the left hand side of the radiator, at the top, is the upper radiator hose; which goes to the upper water pump connection.

On the right hand side of the radiator, from the bottom, is the lower radiator hose; which goes to the lower water pump connection.

Where is the lower radiator hose 99
It is a forum and goes on about draining the radiator.

Cadillac STS... | Answered on Mar 31, 2015


low on coolant or clogged heater core. if coolant is nasty could be clogged. if low you have a leak.

Cadillac STS... | Answered on Jan 13, 2015


check to see if the reverse light works off of the one that works. trace the wires. and the tag light may be part of the circuit too. be sure to check your grounds across the back. problem might be where the one that is working is coming out and going to the other one. make sure the sockets aren't burnt up. check power before the socket and look for ground also.

Cadillac STS... | Answered on Jan 13, 2015


posible baterie therminal loose

Cadillac STS... | Answered on Oct 22, 2014


Why you here

You go to a dealers parts dept for parts

Why would someone on the internet have
part #'s ?

Cadillac STS... | Answered on Oct 14, 2014


Get a code scanner and check for the error codes (DTCs) - they will show you what's wrong.

Cadillac STS... | Answered on Sep 27, 2014

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