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I have good tire wear with factory 1999 settings, but I have had the front tires dismounted and remounted (left to right and vice versa) around 10k miles to even out the wear. This has yielded great results with "flat" tire wear. Of course this will cost you a little extra money, but you will...

To adjust / modify the PCM software you'll need third party software / hardware from companies like HP Tuners or EFI Live, etc. I am not associated with any of these companies. You could also seek out someone who does PCM tuning, which is quit common. You should be able to find someone easily...

My initial guess would be that due to the minor modifications done to your vehicle to help it "breath" better, it is now running lean. The 10% Ethanol (or more) in our fuel now does not help the situation. If your computer tune / calibration was not change or modified to take advantage of the...

Can you clarify some of your information? You state that there is some "bucking" between 1k and 1.5k, but then say in the end "the car seems to run fine but...". CG

My '99 had the "no brake lights", except the center brake light, ailment. Bought a new switch at the local Chevy dealer for $42. My new switch was made in Poland. The switch will "pop" out from the rear (with a little force from the front, pushing the assembly to the rear) and you can work it...

I concur. However, at the time I was writing my post, I was just thinking how putting an optical sensor in an ozone enriched, high voltage environment was not good engineering sense. CG

I've just received my MSD Optispark. Hopefully this is the last time I will have to replace it. I replaced it previously (Not an OE one) and had a bad feeling about it. I also need to replace the front crankshaft seal, so I am going to do that as well. Of all the quirkie things on the later...

There are quite a few 2.0 DIN head units to choose from with the features you are looking for. Crutchfield is always helpful and they usually carry the better brands, but there are alternatives too. The "static" you are hearing is probably from the head unit volume control, but without...

Most (if not all) modern alternators (with internal voltage regulators) are temperature compensated. It is a known fact that a battery's charging needs will change depending on the ambient temperature range. As an experiment, if you had two batteries in a vehicle and they were electrically...

Alternator output / battery charging is also temperature dependent. For example, in the morning, the alternator output is high, especially in the winter time (region dependent, but in general, an accurate statement). As the vehicle / under the hood warms up, the alternator charge voltage will...

I usually use anti-seize compound whenever a steel bolt is threaded into aluminum. Unless it is a head bolt or something similar where the final torque setting is critical. CG

I get the best results from vacuum bleeding. Made my own reservoir and I use my hand held vacuum pump. The results are a very tight brake pedal and you don't have to pump the poor master cylinder into oblivion. CG

I had a similar issue with my 1999 convertible. I replaced the driver side actuator door based on codes from the DIC. The OE actuator gear did what they all do... the plastic gear split for the metal center piece / hub. After this was complete, I still had warmer air from the center and driver...

After buying a second pair of Duralast wiper blades, I cannot recommend them. The second pair do not clear the hood. The Trico Exact Fit blades (From Advance Discount) appear to work great though (FTR 20-1) is the model number on the front of the package. $8.99 each. These are a low profile...

Opps... :happyanim: Ok - 1987 Camaro. CG

If you're going to upgrade your alternator, with say a Power Master unit, then you can usually just bolt these on and not have any issues. However, if you have a stock (CS130 / CS144 for example) unit rebuilt (DIY or otherwise) say above 150 amp, you will more than likely need a overdrive...

I hear ya'. Since I have an automatic, I have the transmission cooling lines to mess with as well. No big deal though, it is still easier than replacing the Opti-Spark on my C4! Which in retrospect, was not that bad. CG

I read the bulletin, but don't see how "polishing" the filler neck would correct my particular issue. These "new type" radiators are known to develop cracks, and in general, are not as robust as the "old" all metal radiators. In my case, I could see the crack on the top of the end cap...

Upon closer inspection, I need a radiator too. On the top of the composite end cap (where the upper radiator hose is) I saw a small puddle of green gook. I cleaned it away to reveal a hairline crack. Radiator is on order and should be here later this week. At least I caught it now instead of...

A week ago I replaced the four belt pulley's (2 AC belt and 2 serpentine belt) and AC belt. While doing this, I noticed some "wetness" from underneath the water pump. After replacing the pulley's I ordered a water pump and the upper and lower radiator hoses. Took me about 1.75 hours to do the...