On a 2002 Envoy you turn the key to run but don't start it. Then push and release the gas pedal 3 times within 5 seconds. The change engine oil light should blink for 5 seconds meaning you have reset the system. If it doesn't blink for you do the procedure again. I'm pretty sure its the same on a 2003. Good luck.
I would suggest you get a service manual such as the factory service manual, a Chilton or other manual. Therein you will find instructions as well as diagrams that will help you change your brakes. If you don't have a manual they are often available at your local library.
Yes, it should be changed as outlined in your owners manual. If you have no manual change them both every 75,000 miles.
It's possible, but complicated. The entire transmission has to be changed out.
It's a transmission where the gears do not change themselves, but have to be changed with a gear shift and a clutch.
Are these the cables for the cables for the manual windows? If so, the cables are changed as part of the assembly called a regulator. Probably available only at a dealer or junk yard. They are riveted to the door frame from the factory. you will have to drill the rivets and replace them with nuts and bolts.
The oil change garage or Mercedes dealer has to reset the oil change light. The oil change light goes by the mileage on the car, tripping the light on at the factory recommended oil change intervals. The computer doesn't know you changed the oil in the car unless you tell it. Read your car owners manual.
You should get a factory service manual to familiarize yourself with the procedure. The rear shocks are fairly easy to change for anyone with general mechanical aptitude and the proper tools. The front shocks should be changed by a good front end shop that has a spring compressor.
Check your owner's manual. Under heavy driving conditions, the factory owner's manual suggests changing it at 50,000 miles.
Open the owners manual you received when you bought the vehicle. In that manual you will find the manufactures recommendation on how often to change the oil/filter and the correct weight of oil to use.
Peicework changed the nature of factory work becuase it entised workers to work faster and longer under poorer conditions (sweatshops). Although the person who worked the fastest and produced the most peices got paid higher than most, it wasn't much and required more manual labor.
Timing belts are changed at a set mileage which is listed in your owners manual. The belt may look good and be ready to break. Change it when that manufacture tells you to change it.
Underneath your steering column you will find the Security Control unit. You may change the setting to manual to no longer use the alarm. You can also change it from horn to siren if you don't have a siren. I just removed the whole thing. Hopefully this helps.