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5

The main thing the higher pressure cap will do is to increase the boiling point of the coolant slightly. 3psi isn't going to make a huge difference, but it will make some difference. If your cooling system is in good shape, the higher pressure unlikely to cause problems. If your cooling system is already on the way out, well, then it'll be on the way out a ...


4

I can't speak for GM, but one reason they may be doing it is that they have a reputation for overheating under heavy use (heavy towing on the trucks and track days for the cars) amongst motorsports enthusiasts. Bumping it up a few psi is relatively safe for the cars and may well be enough to help keep the overheating under control.


3

All engines shipped from GM since January 2006 carry the newer 58x reluctor wheel. If you have an early LS2 (PN 12499750) then it's considered an '05 engine and will carry the 24x reluctor wheel like the LS1 and LS6 variants. This is important to know when you start shopping around for a computer to run your engine. Any LS engine can be converted either way ...


3

The bulb modules could actually be bad, despite both filaments coming on in high beam mode. Pull the connector at each bulb, there will be three wires: tan, green and black. The black is ground, tan is low and green is high. Make sure there is power on the tan wire when the headlights are on and the high/low switch is set to low. If the tan wire is hot, ...


2

Odometer tampering always has been and will probably always be possible. The only thing likely to change is the difficulty involved (and perhaps the legal penalties for doing it). If the perpetrator doesn't thoroughly cover their tracks, you might find hints that something isn't right by checking service records and Carfax (or similar services). Oil ...


2

As Brian alluded to in his comment, in most cases it will not work. You have to have a reader which will read OBD-I. Some readers, like the Innova 3140 will read both, and comes with all of the adapters to attach to the "older" vehicles. Brian also stated about the change to OBD-II. In the US it was mandated to change over in '96. Some manufactures changed ...


2

You need to find the RPO (Regular Production Options) list on the Service Parts Identification label. Similar to what is pictured below. It will likely be on the spare tire cover or the glove box, but may also be in the door jam or under some other compartment lid. Each on of those three digit number/letters indicates an option the car is equipped with on ...


2

Definitely sounds like the spark plugs or ignition coil to me. My father owns a mechanic shop in Boston and when my car was doing the SAME exact thing in the winter, he just replaced a certain spark plug and ignition coil that went bad and everything was all better. You won't know for sure without checking. If you know what burned out spark plugs will look ...


2

If you have any doubt at all that the RPO code sticker is accurate (like, maybe someone swapped the rear differential), you can tell an ordinary open diff from an LSD by jacking up the rear end of the car, releasing the parking brake, and turning each rear wheel in turn, leaving the other one free to turn by itself. With an open differential, the opposite ...


2

Just replace the injector plug. I believe it should look like this: You can order it from RockAuto.com for ~$6 (I'm sure you can get it from many other places as well. I would soldier this in place using heat shrink to seal them up. As far as the gaskets go, your vehicle uses the gaskets with the rubber-ish sealing portion (don't know what they are made ...


1

It sounds like you have three potential problems: The first problem you described sounds like you need to replace the temperature sending unit. This is important not only for your piece of mind (so you can read the correct temp on the gauge), but for your engine and fuel economy as well. Your computer could be reading the temp of this sensor and giving ...


1

On the face of it this should not happen. As have you white noise coming from your speakers it would seem that your radio/CD set has broken down internally. A check over from a competent auto electrician will determine if the fault is internal or down to any items such as mega-bass units external to the set, or even the aerial lead coming unplugged. A ...


1

As Larry said, look for the RPO codes. The code you are looking for the Limited Slip option is G80. Look here for a list of RPO codes specific to your CTS.


1

AFAIK, it's still possible on any car. Interrupt whatever mileage sensing system they have and the odometer won't increment. Older cars it was cable driven from the transmission. Newer cars have electrical sensors. Either way, interrupt the signal and no mileage gets counted. I can imagine it may be able to come up with a system less easily fooled if ...


1

First, make sure the spark plug wires are tight. On those cars it's easy to accidently knock one loose (loose enough to be intermittent) while doing an oil change. Those cars also seem to eat ignition coils, so that's a likely candidate. Spark plugs are also possible. Not very likely, but they're pretty cheap, so are often done first just in case they're ...



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